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<build>
  <plugins>
    <plugin>
      <groupId>org.onosproject</groupId>
      <artifactId>onos-yang-maven-plugin</artifactId>
      <version>1.9</version>
         <version>1.0.0-SNAPSHOT</version>
      <executions>
        <execution>
          <configuration><configuration>
             <classFileDir>src/main/java</classFileDir>
          </configuration>
          <goals>
            <goal>yang2java</goal>
          </goals>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>

Note:

1. If user does not provide any configurations for code generation , code will be generated in "target/generated-sources" folder. This folder conatains majorly,
   i) Service interface for module.
   ii) Module interface and its param class.
   iii) Interfaces of child constructs of module and their default implementation class.
   
2. If a yang file contains only typedef/grouping nodes, there will not be any generation of service class only one interface will be generated.

File : acme-system.yang
module acme-system {
     namespace "http://acme.example.com/system";
     prefix "acme";
     organization "ACME Inc."

File : network.yang
  module network {
     yang-version 1;
     namespace "urn:TBD:params:xml:ns:yang:nodescontact "joe@acme.example.com";
     prefix nd;description

     organization "TBD";
  "The module for contact
entities implementing the ACME    "WILL-BE-DEFINED-LATER"system.";
      descriptionrevision 2007-06-09 {
       "This module definesdescription a common base model for a collection"Initial revision.";
     }
     container system {
 of nodes in a network. Node definitions s arecontainer furtherlogin used{
        in network topologies and inventories.";

    leaf revision 2014-03-09 message {
       description
          "Initial revision."type string;
       reference "draft-clemm-i2rs-yang-network-topo-04";
     }
     description
     list networklist {
       key "network-id";

      "Message leafgiven network-id {
   at start of login session";
      type string;
       }

       leaf server-provided {}
         type boolean;}
         config false;.
       }.
     }
     ….
}

File : network.yang
  module network { 
     yang-version 1; 
     namespace "urn:TBD:params:xml:ns:yang:nodes"; 
     prefix nd; 
 
     organization "TBD"; 
     contact 
       "WILL-BE-DEFINED-LATER"; 
     description 
       "This module defines a common base model for a collection 
        of nodes in a network. Node definitions s are further used 
        in network topologies and inventories."; 
 
     revision 2014-03-09 { 
       description 
         "Initial revision."; 
       reference "draft-clemm-i2rs-yang-network-topo-04"; 
     } 
      
     list networklist { 
       key "network-id"; 
 
       leaf network-id { 
         type string; 
       } 
 
       leaf server-provided { 

File : acme-system.yang
module acme-system {
    namespace "http://yang-central.org/ns/example/acme";
    prefix acme;

    include "acme-types";
 
    leaf id {
        type string;
    }
}
File : acme-types.yang
submodule acme-types {
    yang-version 1;
    belongs-to "acme-system" {
        prefix "acme";
    }
    leaf access-timeout {
         type uint32; boolean; 
         config false; 
       } 
     } 
    leaf retries {
 rpc rpc-test { 
      input { 
        container cont { 
            leaf lf { 
                type uint8string; 
            } 
        } 
      } 
    }  
}

File : acme-system.yang
module acme-system {
     namespace "WG Web:   <http:http://toolsyang-central.ietf.org/wgns/netmodexample/>acme";
    prefix acme;
  WG List:  <mailto:netmod@ietf.org>
include "acme-types";
 
    container access {
 WG Chair: David Kessens
    leaf id {
           <mailto:david.kessens@nsn.com>

   type uint32;
     WG Chair: Juergen Schoenwaelder}
        
    }
}
File     <mailto:j.schoenwaelder@jacobs-university.de>

  : acme-types.yang
submodule acme-types {
     Editor:   Juergen Schoenwaelderyang-version 1;
    belongs-to "acme-system" {
           <mailto:j.schoenwaelder@jacobs-university.de>prefix "acme";

     description
      "This module contains a collection of generally useful derived}
    
    container   YANG data types.

access {
       Copyright (c) 2013 IETF Trust and the persons identified asleaf access-timeout {
       authors of the code.  All rightstype reserved.uint32;

       Redistribution and use in source and binary forms, with or }
       without modification,leaf is permitted pursuant to, and subject
  retries {
     to the license terms contained in, the Simplified BSD Licensetype uint8;
       set forth}
 in Section  }
}

Code generation will be same as module.

module dhcp {
  namespace "http://yang-central.org/ns/example/dhcp";
  prefix dhcp;

 import ietf-yang-types { prefix yang; }
 import ietf-inet-types { prefix inet; }
}

File : flow-classifier.yang
module flow-classifier {
    yang-version 1;
    namespace "sfc.flowclassifier";
    prefix "flow-classifier";
    import "ietf-yang-types" {
        prefix "yang";
    } 
    
    organization "ON-LAB";
    description "This submodule defines for flow classifier.";
    revision "2016-05-24" {
4.c of the IETF Trust's Legal Provisions
       Relating to IETF Documents
       (http://trustee.ietf.org/license-info).

       This version of this YANG module is part of RFC 6991; see
       the RFC itself for full legal notices.";

     revision 2013-07-15 {
       description
        "This revision adds the following new data types:
         - yang-identifier
         - hex-string
         - uuid
         - dotted-quad";
       reference
        "RFC 6991: Common YANG Data Types";
     }

     revision 2010-09-24 {
       description
        "Initial revision.";
       reference
        "RFC 6021: Common YANG Data Types";
     }

     typedef uuid {
       type string {
         pattern '[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-'
              description + '[0-9a-fA-F]{4}-[0-9a-fA-F]{12}';
 "Initial revision.";
      }
       description
    leaf id {
  "A Universally Unique IDentifier in the string representationtype yang:uuid;
    }
}

File     defined in RFC 4122.  The canonical representation uses: ietf-yang-types.yang
module ietf-yang-types {

     namespace    lowercase characters.
"urn:ietf:params:xml:ns:yang:ietf-yang-types";
     prefix "yang";

     organization
      "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

     contact
      "WG Web:   The following is an example of a UUID in string representation:
<http://tools.ietf.org/wg/netmod/>
       WG List:  <mailto:netmod@ietf.org>

       WG Chair:  f81d4fae-7dec-11d0-a765-00a0c91e6bf6David Kessens
         ";
        <mailto:david.kessens@nsn.com>

       WG Chair: Juergen referenceSchoenwaelder
          "RFC 4122: A Universally Unique IDentifier (UUID) URN
         <mailto:j.schoenwaelder@jacobs-university.de>

       Editor:   Juergen Schoenwaelder
                 Namespace<mailto:j.schoenwaelder@jacobs-university.de>";

     }
}

File : Uuid.java
package org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev20100924.ietfyangtypes;
import java.util.Objects;
import com.google.common.base.MoreObjects;

public final class Uuid {
    public final class SystemImpl implements Systemprivate String string;

    private Uuid() {
    }

    privatepublic Uuid(String value) hostName;{
        @Overridethis.string = value;
    }

    public static Uuid of(String hostName() {
    value) {
        return new Uuid(value);
    }

    public String string() {
        return hostNamestring;
    }

    }@Override
    public int .
hashCode() {
        return Objects.hash(string);
    .}

    }
}

File : acme-system.yang
module acme-system {
     namespace "http://acme.example.com/system";
     prefix "acme";
     organization "ACME Inc.";
     contact "joe@acme.example.com";
     description
        "The module for entities implementing the ACME system.";
     revision 2007-06-09 {
         description "Initial revision.";
     }
     container system {
             getAugmentedInfoList().add(value);leaf host-name {
        }

        type @Overridestring;
        public List<AugmentedInfo> getAugmentedInfoList() {
     description "Hostname for this  system";
  return augmentedInfoList;
        }

     }
    @Override.
    .
    .
}

File:  public void removeAugmentation() {
            getAugmentedInfoList().clear();
        }
    }
}

File : acme-system.yang
module acme-system {
    @Override
 namespace "http://acme.example.com/system";
      public String addThisBeforeClass() {prefix "acme";
     organization "ACME Inc.";
     return addThisBeforeClasscontact "joe@acme.example.com";
     description
   }

     "The module for @Override
entities implementing the ACME system.";
    public int hashCode()revision 2007-06-09 {
         description   return Objects.hash(name, fullName, addThisBeforeClass)"Initial revision.";
     }
   }

  container system  {
   @Override
        public boolean equals(Object obj) leaf-list domain-search {
              if (this == obj)type {string;
                return true description "List of domain names to search";
             }
     }
    .
    if.
 (obj instanceof LoginImpl) .
}

File : System.java
package org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem; 

import java.util.BitSet; 
import java.util.List; 

/** 
 * Abstraction of an entity which represents the functionality of system. 
 */ 
public interface System { 

    /** 
     * Identify the leaf of System. 
     */ 
    public enum LeafIdentifier implements org.onosproject.yang.model.LeafIdentifier{ {
                LoginImpl other = (LoginImpl) obj;
                return
                     Objects.equals(name, other.name) &&
        /** 
         * Represents  Objects.equals(fullName, other.fullName) &&domainSearch. 
         */ 
           Objects.equals(addThisBeforeClass, other.addThisBeforeClassDOMAINSEARCH(1); 

        private int leafIndex; 
 }
        public int getLeafIndex() { 
   return  false;
       return }leafIndex; 

        @Override} 

        public String toString(LeafIdentifier(int value) { 
            return MoreObjects.toStringHelper(getClass())
   this.leafIndex = value; 
        } 
    .add("name", name)} 

    /** 
     * Returns the attribute   .add("fullName", fullName)domainSearch. 
     * 
     * @return domainSearch list  .add("addThisBeforeClass", addThisBeforeClass)of domainSearch 
     */ 
          .toStringList<String> domainSearch(); 

    /** 
   }
  * Returns the attribute valueLeafFlags. 
 public LoginImpl(LoginBuilder builderObject) {
 * 
     * @return valueLeafFlags value of this.name = builderObject.name();valueLeafFlags 
     */ 
      this.fullName = builderObject.fullNameBitSet valueLeafFlags(); 

    /** 
     * Sets this.addThisBeforeClassthe =attribute builderObject.addThisBeforeClass();domainSearch. 
     * 
   }

  * @param domainSearch list of domainSearch @Override
     */ 
   public void addAugmentationdomainSearch(AugmentedInfoList<String> valuedomainSearch); {

    /** 
     * Adds  getAugmentedInfoList().add(value);to the list of domainSearch. 
     * 
   }

  * @param addTo value of domainSearch @Override
     */ 
   public List<AugmentedInfo>void getAugmentedInfoListaddToDomainSearch(String addTo); {


    /** 
     * Checks returnif augmentedInfoList;
the leaf value is set. 
    }

 * 
     * @Override
@param leaf leaf whose value status needs to publicchecked void
 removeAugmentation() {
   * @return result of leaf value set in  getAugmentedInfoList().clear();object 
     */ 
   }
 boolean isLeafValueSet(LeafIdentifier leaf); }
}

GeneratedFile java files for list's holder(another list):

File : Login.java
public interface Login extends AugmentationHolder  {
    String name();
List<org: DefaultSystem.java

package org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem.login.Login> login();
    interface LoginBuilder {
        String name();
List<org; 

import com.google.common.base.MoreObjects; 
import java.util.ArrayList; 
import java.util.BitSet; 
import java.util.List; 
import java.util.Objects; 
import org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem.login.Login> login();
        LoginBuilder name(String name);
        LoginBuilder login(List<org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem
                .login
                .Login> login);
        Login build();
    }
}

File : LoginBuilder.java
public class LoginBuilder implements Login.LoginBuilder {
    private String name;
    private List<org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem.login.Login> login;model.InnerModelObject; 

/** 
 * Represents the implementation of system. 
 * 
 * <p> 
 * valueLeafFlags identify the leafs whose value are explicitly set 
 * Applicable in protocol edit and query operation. 
 * </p> 
 */ 
public class DefaultSystem extends InnerModelObject implements System { 
    protected List<String> domainSearch; 
    protected BitSet valueLeafFlags = new BitSet(); 

    @Override 
    public List<String> domainSearch() { 
        return domainSearch; 
    } 

    @Override 
    public StringBitSet namevalueLeafFlags() { 
        return namevalueLeafFlags; 
    } 

    @Override 
    public List<org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem.login
    void domainSearch(List<String> domainSearch) { 
        .Login> loginvalueLeafFlags.set(LeafIdentifier.DOMAINSEARCH.getLeafIndex()); {
        this.domainSearch return= logindomainSearch; 
    } 

    @Override 
    public LoginBuildervoid nameaddToDomainSearch(String nameaddTo) { 
        this.nameif (domainSearch = name;
= null) { 
            domainSearch = new ArrayList<>(); 
         return this;} 
        domainSearch.add(addTo); 
    } 


    @Override 
    public LoginBuilderint login(List<org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609hashCode() { 
        return Objects.hash(domainSearch, valueLeafFlags); 
  .acmesystem  } 

    @Override 
    public boolean  .login.Login> loginequals(Object obj) { 
        if (this.login == login;
obj) { 
            return thistrue; 
        } 
       .
 if (obj instanceof DefaultSystem) { 
       .
    .     DefaultSystem other = (DefaultSystem) obj; 
    public    final class LoginImpl implements Loginreturn {
    .
    .
    .
    }
}

File : acme-system.yang
module acme-system {
    namespace "http://acme.example.com/system";
    prefix "acme";
    organization "ACME Inc.";
    contact "joe@acme.example.com";
    description
        "The module for entities implementing the ACME system.";
    revision 2007-06-09 {
        description "Initial this.port = portrevision.";
    }
    list returnlogin this;{
    }

    key @Override"name";
    public    SfpInputlist build()login {
          return  new SfpInputImpl(this)key "name";
    }

    public SfpInputBuilder() {
  leaf name }{

    public final class SfpInputImpl implements SfpInput {

      type string;
  private String port;

        @Override}
           public String port()leaf full-name {
            return port;
   type string;
    }

        @Override}
        public int hashCode() {
 leaf class {
         return Objects.hash(port);
      type  }
string;
        @Override
    }
    public boolean equals(Object obj) {}
        leaf name {
   if (this == obj) {
     type string;
        }
   return true;}
    .
    .
    .
}

Note: Qualified name is used for child node "login".  
 
File : Login.java
package org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem; 

import java.util.BitSet; 
import java.util.List; 

/** 
 * Abstraction of an entity which represents the functionality of login. 
 */ 
public interface Login { 

    /** 
     * Identify the leaf of Login.  }
            if (obj instanceof SfpInputImpl) {
                SfpInputImpl other = (SfpInputImpl) obj;
                return
     */ 
    public enum LeafIdentifier implements org.onosproject.yang.model.LeafIdentifier{ 
        Objects.equals(port, other.port);/** 
         * Represents name. }
         */ 
  return false;
     NAME(1); 

   }

     private int leafIndex; @Override

        public Stringint toStringgetLeafIndex() { 
                return MoreObjects.toStringHelper(getClass())return leafIndex; 
        } 

        LeafIdentifier(int  .add("port", port)value) { 
            this.leafIndex = value; 
    .toString();
    } 
    } 

    /** 
     public* SfpInputImpl(SfpInputBuilder builderObject) {
  Returns the attribute name. 
     * 
     * @return name value this.portof = builderObject.port();name 
     */ 
  }
  String name(); }
}
File  : Sfpoutput.java
package org.onosproject.yang.gen.v1.http.huawei.com.rev20160526.sfc.sfp;

public interface SfpOutput {
 /** 
     * Returns the attribute valueLeafFlags. 
     * 
    String path();

    interface SfpOutputBuilder {
 * @return valueLeafFlags value of valueLeafFlags 
     */ 
  String  BitSet pathvalueLeafFlags(); 

    /** 
    SfpOutputBuilder path(String path);
 * Returns the attribute login. 
     * 
     * @return login SfpOutput build();list of login 
     }
}
File : SfpOutputBuilder.java

package org*/ 
    List<org.onosproject.yang.gen.v1.http.huaweiacme.example.com.rev20160526system.sfc.sfp;

import com.google.common.base.MoreObjects;
import java.util.Objects;
public class SfpOutputBuilder implements SfpOutput.SfpOutputBuilder {

     private String path;

    @Overriderev20070609.acmesystem.login.Login> login(); 

    /** 
     * Sets the attribute name. 
     * 
    public String* path() {
         return path;@param name value of name 
    }

    @Override */ 
    publicvoid SfpOutputBuilder pathname(String pathname); {

         this.path = path;/** 
     * Sets the attribute returnlogin. this;
    }

   * @Override
    public SfpOutput* build() {
    @param login list of login 
     return new SfpOutputImpl(this);*/ 
    }

    public SfpOutputBuilder() {void login(List<org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem.login 
    }

    public final class SfpOutputImpl implements SfpOutput {.Login> login); 

    /** 
    private String path;

         @Override* Adds to the list of login. 
         public String path() {* 
     * @param addTo value of   returnlogin path;
         }
*/ 
         @Override
void addToLogin(org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem.login 
           public int.Login hashCode(addTo); {


    /** 
     * Checks return Objects.hash(path);
         }
if the leaf value is set. 
     * 
   @Override
  * @param leaf leaf whose value status publicneeds boolean equals(Object obj) {to checked 
     * @return result of leaf value set ifin (this == obj) {object 
     */ 
    boolean isLeafValueSet(LeafIdentifier leaf); 
}

File : DefaultLogin.java

package org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem; 

import com.google.common.base.MoreObjects; 
import  return true;
            }
            if (obj instanceof SfpOutputImpl) {
                     SfpOutputImpl other = (SfpOutputImpl) obj;
                     return Objects.equals(path, other.path);
            }
            return false;
         }

          @Override
         public String toString() {java.util.ArrayList; 
import java.util.BitSet; 
import java.util.List; 
import java.util.Objects; 
import org.onosproject.yang.model.InnerModelObject; 
import org.onosproject.yang.model.MultiInstanceObject; 

/** 
 * Represents the implementation of login. 
 * 
 * <p> 
 * valueLeafFlags identify the leafs whose value are explicitly set 
 * Applicable in protocol edit and query operation. 
 * </p> 
 */ 
public class DefaultLogin extends InnerModelObject 
        implements Login, MultiInstanceObject<LoginKeys> { 
    protected String name; 
    protected BitSet valueLeafFlags = new BitSet(); 
    protected List<org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem.login 
            .Login> login; 

    @Override 
    public String name() { 
        return name; 
    } 

    @Override 
    public BitSet valueLeafFlags() { 
        return valueLeafFlags; 
  return MoreObjects.toStringHelper(getClass())
     } 

    @Override 
    public List<org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem 
            .login.add("path", path)Login> login() { 
        return login; 
    } 

    @Override 
    public void name(String name) { 
       .toString valueLeafFlags.set(LeafIdentifier.NAME.getLeafIndex()); 
        this.name = name; 
    } 

    @Override 
    public SfpOutputImpl(SfpOutputBuilder builderObject) {
    void login(List<org.onosproject.yang.gen.v1.http.acme.example.com.system.rev20070609.acmesystem 
            .login.Login> login) { 
        this.pathlogin = builderObject.path()login; 
    } 

    }@Override 
     }
}

module Test {
    namespace "http://test.example.com/";
   this.severity =prefix severity"test";
    organization "ACME Inc.";
  return this;
 grouping endpoint { }

    @Override
    public Test build()leaf address {
        return new TestImpl(this);
  type int32; }

    public TestBuilder() {
   } }

    public final class TestImpl implementsleaf Testport {

        private List<AugmentedInfo> augmentedInfoList = newtype ArrayList<>()int8; 
        private String eventClass;}
        private String severity;

}
    container connection  { @Override
        publiccontainer Stringsource eventClass() {
            returnuses eventClassendpoint;
        }

        @Override
container        public String severity() destination {
            returnuses severityendpoint;
        }

    }
    @Override.
    .
    .
}

File : Connection.java
package org.onosproject.yang.gen.v1.http.test.example.com.test; 

import org.onosproject.yang.gen.v1.http.test.example.com.test.connection.Destination; 
import org.onosproject.yang.gen.v1.http.test.example.com.test.connection.Source; 

/** 
 * Abstraction of an entity which represents the functionality of connection. 
 */ 
public interface Connection { 

    /** public int hashCode() {
            return Objects.hash(eventClass, severity);
        }

        @Override
        public boolean equals(Object obj) {
           if (this == obj) {
     * Returns the attribute source. 
     return* true;
     * @return source value of source  }
     */ 
    Source  if (obj instanceof TestImpl) {source(); 

    /** 
     * Returns the attribute destination. 
  TestImpl other = (TestImpl)* obj;
     * @return destination value of destination 
     return Objects.equals(eventClass, other.eventClass) &&*/ 
    Destination destination(); 

    /** 
     * Sets the attribute    Objects.equals(severity, other.severity);source. 
     * 
     * }
@param source value of source 
       return false;*/ 
    void    }source(Source source); 

        @Override/** 
     * Sets the publicattribute String toString() {destination. 
            return MoreObjects.toStringHelper(getClass())* 
     * @param destination value of destination 
         .add("eventClass", eventClass)*/ 
    void destination(Destination destination); 

}

File : link.yang
module link {
    yang-version 1;
    namespace http://huawei.com;
    prefix Ant;
    container link {
        choice interfaceType                .add("severity", severity)
                    .toString();
        }

        public TestImpl(TestBuilder builderObject) {
            this.eventClass = builderObject.eventClass();
            this.severity = builderObject.severity();
        }

        @Override
        public void addAugmentation(AugmentedInfo value) {
            getAugmentedInfoList().add(value);case ethernerType {
        }

        @Override
leaf ethernet { type string; }
   public List<AugmentedInfo> getAugmentedInfoList() {
      }
      return augmentedInfoList;
     case p2pType {
 }

        @Override
      leaf p2p public{ void removeAugmentation() {type string; }
            getAugmentedInfoList().clear();}
        }
     }
}

File: sfc.yang
module Sfc {
    yang-version 1;
    namespace http://huawei.com;
    prefix Ant;
    rpc SFP {
        input {
            leaf port {
                type string;
            }
          }
          output {
            leaf path {
                type string;
            }
          }
    }
}

File : SfcService.java
package org.onosproject.yang.gen.v1.http.huawei.com; 

import org.onosproject.yang.gen.v1.http.huawei.com.sfc.sfp.SfpInput; 
import org.onosproject.yang.gen.v1.http.huawei.com.sfc.sfp.SfpOutput; 

/** 
 * Abstraction of an entity which represents the functionality of sfc. 
 */ 
public interface SfcService { 
    /** 
     * Service interface of sfp. 
     * 
     * @param inputVar input of service interface sfp 
     * @return sfpOutput output of service interface sfp 
     */ 
    SfpOutput sfp(SfpInput inputVar); 

}

File : SfpInput.java
package org.onosproject.yang.gen.v1.http.huawei.com.sfc.sfp; 

import java.util.BitSet; 

/** 
 * Abstraction of an entity which represents the functionality of sfpInput. 
 */ 
public interface SfpInput { 

    /** 
     * Identify the leaf of SfpInput. 
     */ 
    public enum LeafIdentifier implements org.onosproject.yang.model.LeafIdentifier{ 
        /** 
         * Represents port. 
         */ 
        PORT(1); 

        private int leafIndex; 

        public int getLeafIndex() { 
            return leafIndex; 
        } 

        LeafIdentifier(int value) { 
            this.leafIndex = value; 
        } 
    } 

    /** 
     * Returns the attribute port. 
     * 
     * @return port value of port 
     */ 
    String port(); 

    /** 
     * Returns the attribute valueLeafFlags. 
     * 
     * @return valueLeafFlags value of valueLeafFlags 
     */ 
    BitSet valueLeafFlags(); 

    /** 
     * Sets the attribute port. 
     * 
     * @param port value of port 
     */ 
    void port(String port); 


    /** 
     * Checks if the leaf value is set. 
     * 
     * @param leaf leaf whose value status needs to checked 
     * @return result of leaf value set in object 
     */ 
    boolean isLeafValueSet(LeafIdentifier leaf); 
}


File : DefaultSfpInput.java
package org.onosproject.yang.gen.v1.http.huawei.com.sfc.sfp; 

import com.google.common.base.MoreObjects; 
import java.util.BitSet; 
import java.util.Objects; 
import org.onosproject.yang.model.InnerModelObject; 

/** 
 * Represents the implementation of sfpInput. 
 */ 
public class DefaultSfpInput extends InnerModelObject implements SfpInput { 
    protected String port; 
    protected BitSet valueLeafFlags = new BitSet(); 

    @Override 
    public String port() { 
        return port; 
    } 

    @Override 
    public BitSet valueLeafFlags() { 
        return valueLeafFlags; 
    } 

    @Override 
    public void port(String port) { 
        valueLeafFlags.set(LeafIdentifier.PORT.getLeafIndex()); 
        this.port = port; 
    } 

    @Override 
    public int hashCode() { 
        return Objects.hash(port, valueLeafFlags); 
    } 

    @Override 
    public boolean equals(Object obj) { 
        if (this == obj) { 
            return true; 
        } 
        if (obj instanceof DefaultSfpInput) { 
            DefaultSfpInput other = (DefaultSfpInput) obj; 
            return 
                Objects.equals(port, other.port) && 
                Objects.equals(valueLeafFlags, other.valueLeafFlags); 
        } 
        return false; 
    } 

    @Override 
    public String toString() { 
        return MoreObjects.toStringHelper(getClass()) 
            .omitNullValues() 
            .add("port", port) 
            .add("valueLeafFlags", valueLeafFlags) 
            .toString(); 
    } 


    /** 
     * Creates an instance of defaultSfpInput. 
     */ 
    public DefaultSfpInput() { 
    } 


    @Override 
    public boolean isLeafValueSet(LeafIdentifier leaf) { 
        return valueLeafFlags.get(leaf.getLeafIndex()); 
    } 

}


File : Sfpoutput.java

package org.onosproject.yang.gen.v1.http.huawei.com.sfc.sfp; 

import java.util.BitSet; 

/** 
 * Abstraction of an entity which represents the functionality of sfpOutput. 
 */ 
public interface SfpOutput { 

    /** 
     * Identify the leaf of SfpOutput. 
     */ 
    public enum LeafIdentifier implements org.onosproject.yang.model.LeafIdentifier{ 
        /** 
         * Represents path. 
         */ 
        PATH(1); 

        private int leafIndex; 

        public int getLeafIndex() { 
            return leafIndex; 
        } 

        LeafIdentifier(int value) { 
            this.leafIndex = value; 
        } 
    } 

    /** 
     * Returns the attribute path. 
     * 
     * @return path value of path 
     */ 
    String path(); 

    /** 
     * Returns the attribute valueLeafFlags. 
     * 
     * @return valueLeafFlags value of valueLeafFlags 
     */ 
    BitSet valueLeafFlags(); 

    /** 
     * Sets the attribute path. 
     * 
     * @param path value of path 
     */ 
    void path(String path); 


    /** 
     * Checks if the leaf value is set. 
     * 
     * @param leaf leaf whose value status needs to checked 
     * @return result of leaf value set in object 
     */ 
    boolean isLeafValueSet(LeafIdentifier leaf); 
}


File : DefaultSfpOutput.java

package org.onosproject.yang.gen.v1.http.huawei.com.sfc.sfp; 

import com.google.common.base.MoreObjects; 
import java.util.BitSet; 
import java.util.Objects; 
import org.onosproject.yang.model.InnerModelObject; 

/** 
 * Represents the implementation of sfpOutput. 
 */ 
public class DefaultSfpOutput extends InnerModelObject implements SfpOutput { 
    protected String path; 
    protected BitSet valueLeafFlags = new BitSet(); 

    @Override 
    public String path() { 
        return path; 
    } 

    @Override 
    public BitSet valueLeafFlags() { 
        return valueLeafFlags; 
    } 

    @Override 
    public void path(String path) { 
        valueLeafFlags.set(LeafIdentifier.PATH.getLeafIndex()); 
        this.path = path; 
    } 

    @Override 
    public int hashCode() { 
        return Objects.hash(path, valueLeafFlags); 
    } 

    @Override 
    public boolean equals(Object obj) { 
        if (this == obj) { 
            return true; 
        } 
        if (obj instanceof DefaultSfpOutput) { 
            DefaultSfpOutput other = (DefaultSfpOutput) obj; 
            return 
                Objects.equals(path, other.path) && 
                Objects.equals(valueLeafFlags, other.valueLeafFlags); 
        } 
        return false; 
    } 

    @Override 
    public String toString() { 
        return MoreObjects.toStringHelper(getClass()) 
            .omitNullValues() 
            .add("path", path) 
            .add("valueLeafFlags", valueLeafFlags) 
            .toString(); 
    } 


    /** 
     * Creates an instance of defaultSfpOutput. 
     */ 
    public DefaultSfpOutput() { 
    } 


    @Override 
    public boolean isLeafValueSet(LeafIdentifier leaf) { 
        return valueLeafFlags.get(leaf.getLeafIndex()); 
    } 

}
 
 
File : DefaultRpcHandler.java
 
package org.onosproject.yang.gen.v1.http.huawei.com;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.onosproject.config.RpcHandler;
import org.onosproject.config.RpcCommand;
import org.onosproject.config.RpcInput;
/**
 * Represents the implementation of RPC handler.
 */
public class DefaultRpcHandler implements RpcHandler {
    private ExecutorService executor;
    @Override
    public void executeRpc(Integer msgId, RpcCommand cmd, RpcInput input) {
        executor = Executors.newSingleThreadExecutor();
        executor.execute(new RpcExecuter(msgId, (RpcExtendedCommand) cmd, input));
    }
    /**
     * Runnable capable of invoking the appropriate RPC command's execute method.
     */
    public class RpcExecuter implements Runnable {
        Integer msgId;
        RpcExtendedCommand cmd;
        RpcInput input;
        /**
         * Constructs a RPC executor for the given msg id, RPC command and
         * RPC input.
         *
         * @param msgId msgId of the RPC message to be executed
         * @param cmd RPC command to be executed
         * @param input input data to the RPC command
         */
        public RpcExecuter(Integer msgId, RpcExtendedCommand cmd, RpcInput input) {
            this.msgId = msgId;
            this.cmd = cmd;
            this.input = input;
        }
        @Override
        public void run() {
            cmd.execute(input, msgId);
        }
    }
}
 
 
File : RegisterRpc.java
 
package org.onosproject.yang.gen.v1.http.huawei.com;
import org.onosproject.yang.gen.v1.http.huawei.com.sfc.SfpCommand;
import java.util.LinkedList;
import java.util.List;
import org.onosproject.config.RpcCommand;
import org.onosproject.config.RpcHandler;
import org.onosproject.config.DynamicConfigService;
import org.onosproject.yang.model.ModelConverter;
/**
 * Represents the implementation of register RPC.
 */
public class RegisterRpc {
    private List<RpcCommand> rpcCommands;
    private RpcHandler rpcHandler;
    private DynamicConfigService storeService;
    private ModelConverter modelConverter;
    private SfcService sfcService;
    /**
     * Constructs a register rpc for the given store service, mode converter and
     * application service.
     *
     * @param store dynamic config service
     * @param modelConverter model converter for convertion
     * @param allService application service
     */
    public RegisterRpc(DynamicConfigService store, ModelConverter modelConverter, SfcService sfcService) {
        this.rpcCommands = new LinkedList<RpcCommand>();
        this.rpcHandler = new DefaultRpcHandler();
        this.storeService = store;
        this.modelConverter = modelConverter;
        this.sfcService = sfcService;
    }
    /**
     * Registers RPC handler with dynamic config service.
     */
    public void registerRpc() {
        createRpcCommands();
        for (RpcCommand rpcCommand : rpcCommands) {
            storeService.registerHandler(rpcHandler, rpcCommand);
        }
    }
    /**
     * Creates RPC command for all the RPC.
     */
    public void createRpcCommands() {
        RpcCommand sfp = new SfpCommand(storeService, modelConverter, sfcService);
        rpcCommands.add(sfp);
    }
}
 
 
File : RpcExtendedCommand.java
 
package org.onosproject.yang.gen.v1.http.huawei.com;
import org.onosproject.yang.model.ResourceId;
import org.onosproject.config.RpcInput;
import org.onosproject.config.RpcCommand;
/**
 * Abstract implementation of an RPC extended command.
 */
public abstract class RpcExtendedCommand extends RpcCommand {
    /**
     * Creates an instance of RPC extended command.
     *
     * @param cmdId of RPC command
     */
    public RpcExtendedCommand(ResourceId cmdId) {
        super(cmdId);
    }
    /**
     * Executes the RPC command.
     *
     * @param input input data to the RPC command
     * @param msgId of the RPC message to be executed
     */
    public abstract void execute(RpcInput rpcInput, int msgId);
}
 
 
File : SfpCommand.java
 
package org.onosproject.yang.gen.v1.http.huawei.com.sfc;
import org.onosproject.yang.gen.v1.http.huawei.com.RpcExtendedCommand;
import org.onosproject.yang.gen.v1.http.huawei.com.SfcService;
import org.onosproject.yang.gen.v1.http.huawei.com.sfc.sfp.DefaultSfpOutput;
import org.onosproject.yang.gen.v1.http.huawei.com.sfc.sfp.SfpInput;
import org.onosproject.yang.model.ModelConverter;
import org.onosproject.yang.model.ResourceId;
import org.onosproject.config.RpcInput;
import org.onosproject.config.RpcOutput;
import org.onosproject.config.DynamicConfigService;
import org.onosproject.yang.model.ResourceData;
import org.onosproject.yang.model.ModelObjectData;
import org.onosproject.yang.runtime.DefaultResourceData;
import org.onosproject.yang.model.DefaultModelObjectData;
import static org.onosproject.config.RpcOutput.Status.RPC_SUCCESS;
/**
 * Represents the implementation of sfp.
 */
public class SfpCommand extends RpcExtendedCommand {
    private ModelConverter modelConverter;
    private SfcService sfcService;
    private DynamicConfigService storeService;
    /**
     * Constructs a sfp command for the given cmd id, model converter,
     * application service.
     *
     * @param cmdId identifier of RPC command
     * @param modelConverter model converter for convertion
     * @param allService application service
     */
    public SfpCommand(DynamicConfigService store, ModelConverter modelConverter, SfcService sfcService) {
        super(getResourceId());
        this.storeService = store;
        this.modelConverter = modelConverter;
        this.sfcService = sfcService;
    }
    @Override
    public void execute(RpcInput rpcInput) {
    }
    /**
     * Executes the RPC command.
     *
     * @param rpcInput input data to the RPC command
     * @param msgId msgId of the RPC message to be executed
     */
    public void execute(RpcInput rpcInput, int msgId) {
        ResourceData inputData = DefaultResourceData.builder()
                .resourceId(getResourceId())
                .addDataNode(rpcInput.input()).build();
        ModelObjectData inputMo = modelConverter.createModel(inputData);
        SfpInput inputObject = ((SfpInput) inputMo.modelObjects().get(0));
        DefaultSfpOutput outputObject = (DefaultSfpOutput) sfcService.sfp(inputObject);
        ModelObjectData outputMo = DefaultModelObjectData.builder()
                .addModelObject(outputObject).build();
        ResourceData outputData = modelConverter.createDataNode(outputMo);
        RpcOutput output = new RpcOutput(RPC_SUCCESS, outputData.dataNodes().get(0));
        storeService.rpcResponse(msgId, output);
    }
    private static ResourceId getResourceId() {
        return new ResourceId.Builder().addBranchPointSchema("/", null)
                .addBranchPointSchema("SFP", "http://huawei.com").build();
    }
}

File : ospf.yang
module ospf {
    namespace "http://example.com/ospf";
    prefix "ospf";

    notification test {
           leaf event-class {
              type string;
           }
           leaf severity {
              type string;
           }
    }
}

File : OspfService.java

package org.onosproject.yang.gen.v1.http.example.com.ospf; 

import org.onosproject.event.ListenerService; 
import org.onosproject.yang.gen.v1.http.example.com.ospf.ospf.OspfEvent; 
import org.onosproject.yang.gen.v1.http.example.com.ospf.ospf.OspfEventListener; 

/** 
 * Abstraction of an entity which represents the functionality of ospf. 
 */ 
public interface OspfService extends ListenerService<OspfEvent, OspfEventListener> { 
}


File : OspfEvent.java

package org.onosproject.yang.gen.v1.http.example.com.ospf.ospf; 

import org.onosproject.event.AbstractEvent; 

/** 
 * Represents event implementation of ospf. 
 */ 
public class OspfEvent extends AbstractEvent<OspfEvent.Type, OspfEventSubject> { 

    public enum Type { 

        /** 
         * Represents test. 
         */ 
        TEST 
    } 

    /** 
     * Creates OspfEventSubject event with type and subject. 
     * 
     * @param type event type 
     * @param subject subject OspfEventSubject 
     */ 
    public OspfEvent(Type type, OspfEventSubject subject) { 
        super(type, subject); 
    } 

    /** 
     * Creates OspfEventSubject event with type, subject and time. 
     * 
     * @param type event type 
     * @param subject subject OspfEventSubject 
     * @param time time of event 
     */ 
    public OspfEvent(Type type, OspfEventSubject subject, long time) { 
        super(type, subject, time); 
    } 

}


File : OspfEventSubject.java

package org.onosproject.yang.gen.v1.http.example.com.ospf.ospf; 
/** 
 * Represents the implementation of ospf. 
 */ 
public class OspfEventSubject { 

    protected Test test; 
    /** 
     * Returns the attribute test. 
     * 
     * @return test value of test 
     */ 
    public Test test() { 
        return test; 
    } 

    /** 
     * Sets the value to attribute test. 
     * 
     * @param test value of test 
     */ 
    public void test(Test test) { 
        this.test = test; 
    } 

}


File : OspfEventListener.java

package org.onosproject.yang.gen.v1.http.example.com.ospf.ospf; 

import org.onosproject.event.EventListener; 

/** 
 * Abstraction for event listener of ospf. 
 */ 
public interface OspfEventListener extends EventListener<OspfEvent> { 
}


File : Test.java

package org.onosproject.yang.gen.v1.http.example.com.ospf.ospf; 

import java.util.BitSet; 

/** 
 * Abstraction of an entity which represents the functionality of test. 
 */ 
public interface Test { 

    /** 
     * Identify the leaf of Test. 
     */ 
    public enum LeafIdentifier implements org.onosproject.yang.model.LeafIdentifier{ 
        /** 
         * Represents eventClass. 
         */ 
        EVENTCLASS(1), 
        /** 
         * Represents severity. 
         */ 
        SEVERITY(2); 

        private int leafIndex; 

        public int getLeafIndex() { 
            return leafIndex; 
        } 
 
        LeafIdentifier(int value) { 
            this.leafIndex = value; 
        } 
    } 

    /** 
     * Returns the attribute eventClass. 
     * 
     * @return eventClass value of eventClass 
     */ 
    String eventClass(); 

    /** 
     * Returns the attribute severity. 
     * 
     * @return severity value of severity 
     */ 
    String severity(); 

    /** 
     * Returns the attribute valueLeafFlags. 
     * 
     * @return valueLeafFlags value of valueLeafFlags 
     */ 
    BitSet valueLeafFlags(); 

    /** 
     * Sets the attribute eventClass. 
     * 
     * @param eventClass value of eventClass 
     */ 
    void eventClass(String eventClass); 

    /** 
     * Sets the attribute severity. 
     * 
     * @param severity value of severity 
     */ 
    void severity(String severity); 


    /** 
     * Checks if the leaf value is set. 
     * 
     * @param leaf leaf whose value status needs to checked 
     * @return result of leaf value set in object 
     */ 
    boolean isLeafValueSet(LeafIdentifier leaf); 
}


File : DefaultTest.java

package org.onosproject.yang.gen.v1.http.example.com.ospf.ospf; 

import com.google.common.base.MoreObjects; 
import java.util.BitSet; 
import java.util.Objects; 
import org.onosproject.yang.model.InnerModelObject; 

/** 
 * Represents the implementation of test. 
 */ 
public class DefaultTest extends InnerModelObject implements Test { 
    protected String eventClass; 
    protected String severity; 
    protected BitSet valueLeafFlags = new BitSet(); 

    @Override 
    public String eventClass() { 
        return eventClass; 
    } 

    @Override 
    public String severity() { 
        return severity; 
    } 

    @Override 
    public BitSet valueLeafFlags() { 
        return valueLeafFlags; 
    } 

    @Override 
    public void eventClass(String eventClass) { 
        valueLeafFlags.set(LeafIdentifier.EVENTCLASS.getLeafIndex()); 
        this.eventClass = eventClass; 
    } 

    @Override 
    public void severity(String severity) { 
        valueLeafFlags.set(LeafIdentifier.SEVERITY.getLeafIndex()); 
        this.severity = severity; 
    } 

    @Override 
    public int hashCode() { 
        return Objects.hash(eventClass, severity, valueLeafFlags); 
    } 

    @Override 
    public boolean equals(Object obj) { 
        if (this == obj) { 
            return true; 
        } 
        if (obj instanceof DefaultTest) { 
            DefaultTest other = (DefaultTest) obj; 
            return 
                Objects.equals(eventClass, other.eventClass) && 
                Objects.equals(severity, other.severity) && 
                Objects.equals(valueLeafFlags, other.valueLeafFlags); 
        } 
        return false; 
    } 

    @Override 
    public String toString() { 
        return MoreObjects.toStringHelper(getClass()) 
            .omitNullValues() 
            .add("eventClass", eventClass) 
            .add("severity", severity) 
            .add("valueLeafFlags", valueLeafFlags) 
            .toString(); 
    } 


    /** 
     * Creates an instance of defaultTest. 
     */ 
    public DefaultTest() { 
    } 


    @Override 
    public boolean isLeafValueSet(LeafIdentifier leaf) { 
        return valueLeafFlags.get(leaf.getLeafIndex()); 
    } 

}

 A augment node can't add the same augmented info to an augmented node multiple times.

File : Test.yang
module Test {
     yang-version 1;
     namespace "http://huawei.com";
     prefix Ant;
     description "Interval before a route is declared invalid";

     container interface {
          leaf ifType {
                type string;
          }
     }

     augment "/interface" {
          leaf ds0ChannelNumber {
               type int16;
         }
    }
}

 
File : AugmentedInterface.java

package org.onosproject.yang.gen.v1.http.huawei.com.test.yangautoprefixinterface; 

import java.util.BitSet; 

/** 
 * Abstraction of an entity which represents the functionality of augmentedInterface. 
 */ 
public interface AugmentedInterface { 

    /** 
     * Identify the leaf of AugmentedInterface. 
     */ 
    public enum LeafIdentifier implements org.onosproject.yang.model.LeafIdentifier{ 
        /** 
         * Represents ds0ChannelNumber. 
         */ 
        DS0CHANNELNUMBER(1); 

        private int leafIndex; 

        public int getLeafIndex() { 
            return leafIndex; 
        } 

        LeafIdentifier(int value) { 
            this.leafIndex = value; 
        } 
    } 

    /** 
     * Returns the attribute ds0ChannelNumber. 
     * 
     * @return ds0ChannelNumber value of ds0ChannelNumber 
     */ 
    short ds0ChannelNumber(); 

    /** 
     * Returns the attribute valueLeafFlags. 
     * 
     * @return valueLeafFlags value of valueLeafFlags 
     */ 
    BitSet valueLeafFlags(); 

    /** 
     * Sets the attribute ds0ChannelNumber. 
     * 
     * @param ds0ChannelNumber value of ds0ChannelNumber 
     */ 
    void ds0ChannelNumber(short ds0ChannelNumber); 


    /** 
     * Checks if the leaf value is set. 
     * 
     * @param leaf leaf whose value status needs to checked 
     * @return result of leaf value set in object 
     */ 
    boolean isLeafValueSet(LeafIdentifier leaf); 
}


File : DefaultAugmentedInterface.java
package org.onosproject.yang.gen.v1.http.huawei.com.test.yangautoprefixinterface; 

import com.google.common.base.MoreObjects; 
import java.util.BitSet; 
import java.util.Objects; 
import org.onosproject.yang.model.InnerModelObject; 

/** 
 * Represents the implementation of augmentedInterface. 
 * 
 * <p> 
 * valueLeafFlags identify the leafs whose value are explicitly set 
 * Applicable in protocol edit and query operation. 
 * </p> 
 */ 
public class DefaultAugmentedInterface extends InnerModelObject implements AugmentedInterface { 
    protected short ds0ChannelNumber; 
    protected BitSet valueLeafFlags = new BitSet(); 

    @Override 
    public short ds0ChannelNumber() { 
        return ds0ChannelNumber; 
    } 

    @Override 
    public BitSet valueLeafFlags() { 
        return valueLeafFlags; 
    } 

    @Override 
    public void ds0ChannelNumber(short ds0ChannelNumber) { 
        valueLeafFlags.set(LeafIdentifier.DS0CHANNELNUMBER.getLeafIndex()); 
        this.ds0ChannelNumber = ds0ChannelNumber; 
    } 

    @Override 
    public int hashCode() { 
        return Objects.hash(ds0ChannelNumber, valueLeafFlags); 
    } 

    @Override 
    public boolean equals(Object obj) { 
        if (this == obj) { 
            return true; 
        } 
        if (obj instanceof DefaultAugmentedInterface) { 
            DefaultAugmentedInterface other = (DefaultAugmentedInterface) obj; 
            return 
                Objects.equals(ds0ChannelNumber, other.ds0ChannelNumber) && 
                Objects.equals(valueLeafFlags, other.valueLeafFlags); 
        } 
        return false; 
    } 

    @Override 
    public String toString() { 
        return MoreObjects.toStringHelper(getClass()) 
            .omitNullValues() 
            .add("ds0ChannelNumber", ds0ChannelNumber) 
            .add("valueLeafFlags", valueLeafFlags) 
            .toString(); 
    } 


    /** 
     * Creates an instance of defaultAugmentedInterface. 
     */ 
    public DefaultAugmentedInterface() { 
    } 


    @Override 
    public boolean isLeafValueSet(LeafIdentifier leaf) { 
        return valueLeafFlags.get(leaf.getLeafIndex()); 
    } 

}

leaf one {                         
    type string;
}

leaf two {                           
    type int32;
}

leaf-list three {
    type boolean;
}

leaf-list four {            
    type int16;
}
leaf mybits {
    type bits {
        bit disable-nagle {
            position 0;
        }
        bit auto-sense-speed {
            position 1;
        }
        bit Mb-only {
            position 2;
        }
    }
    default "auto-sense-speed";
}

File : Test.java

package org.onosproject.yang.gen.v1.http.huawei.com;

import java.util.BitSet;
import java.util.List;

/**
 * Abstraction of an entity which represents the functionality of test.
 */
public interface Test {

    /**
     * Identify the leaf of Test.
     */
    public enum LeafIdentifier implements org.onosproject.yang.model.LeafIdentifier{
        
        ONE(1),
        /**
         * Represents two.
         */
        TWO(2),
        /**
         * Represents mybits.
         */
        MYBITS(3),
        /**
         * Represents three.
         */
        THREE(4),
        /**
         * Represents four.
         */
        FOUR(5);

        private int leafIndex;

        public int getLeafIndex() {
            return leafIndex;
        }

        LeafIdentifier(int value) {
            this.leafIndex = value;
        }
    }

    /**
     * Returns the attribute one.
     *
     * @return one value of one
     */
    String one();

    /**
     * Returns the attribute two.
     *
     * @return two value of two
     */
    int two();

    /**
     * Returns the attribute mybits.
     *
     * @return mybits value of mybits
     */
    BitSet mybits();

    /**
     * Returns the attribute three.
     *
     * @return three list of three
     */
    List<Boolean> three();

    /**
     * Returns the attribute four.
     *
     * @return four list of four
     */
    List<Short> four();

    /**
     * Returns the attribute valueLeafFlags.
     *
     * @return valueLeafFlags value of valueLeafFlags
     */
    BitSet valueLeafFlags();

    /**
     * Sets the attribute one.
     *
     * @param one value of one
     */
    void one(String one);

    /**
     * Sets the attribute two.
     *
     * @param two value of two
     */
    void two(int two);

    /**
     * Sets the attribute mybits.
     *
     * @param mybits value of mybits
     */
    void mybits(BitSet mybits);

    /**
     * Sets the attribute three.
     *
     * @param three list of three
     */
    void three(List<Boolean> three);

    /**
     * Sets the attribute four.
     *
     * @param four list of four
     */
    void four(List<Short> four);

    /**
     * Adds to the list of three.
     *
     * @param addTo value of three
     */
    void addToThree(Boolean addTo);

    /**
     * Adds to the list of four.
     *
     * @param addTo value of four
     */
    void addToFour(Short addTo);


    /**
     * Checks if the leaf value is set.
     *
     * @param leaf leaf whose value status needs to checked
     * @return result of leaf value set in object
     */
    boolean isLeafValueSet(LeafIdentifier leaf);
}



File : TestOpParam

package org.onosproject.yang.gen.v1.http.huawei.com;

import com.google.common.base.MoreObjects;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import org.onosproject.yang.model.InnerModelObject;

/**
 * Represents the implementation of test.
 *
 * <p>
 * valueLeafFlags identify the leafs whose value are explicitly set
 * Applicable in protocol edit and query operation.
 * </p>
 */
public class TestOpParam extends InnerModelObject implements Test {
    protected String one;
    protected int two;
    protected BitSet mybits;
    protected List<Boolean> three;
    protected List<Short> four;
    protected BitSet valueLeafFlags = new BitSet();

    @Override
    public String one() {
        return one;
    }

    @Override
    public int two() {
        return two;
    }

    @Override
    public BitSet mybits() {
        return mybits;
    }

    @Override
    public List<Boolean> three() {
        return three;
    }

    @Override
    public List<Short> four() {
        return four;
    }

    @Override
    public BitSet valueLeafFlags() {
        return valueLeafFlags;
    }

    @Override
    public void one(String one) {
        valueLeafFlags.set(LeafIdentifier.ONE.getLeafIndex());
        this.one = one;
    }

    @Override
    public void two(int two) {
        valueLeafFlags.set(LeafIdentifier.TWO.getLeafIndex());
        this.two = two;
    }

    @Override
    public void mybits(BitSet mybits) {
        valueLeafFlags.set(LeafIdentifier.MYBITS.getLeafIndex());
        this.mybits = mybits;
    }

    @Override
    public void three(List<Boolean> three) {
        valueLeafFlags.set(LeafIdentifier.THREE.getLeafIndex());
        this.three = three;
    }

    @Override
    public void four(List<Short> four) {
        valueLeafFlags.set(LeafIdentifier.FOUR.getLeafIndex());
        this.four = four;
    }

    @Override
    public void addToThree(Boolean addTo) {
        if (three == null) {
            three = new ArrayList<>();
        }
        three.add(addTo);
    }


    @Override
    public void addToFour(Short addTo) {
        if (four == null) {
            four = new ArrayList<>();
        }
        four.add(addTo);
    }


    @Override
    public int hashCode() {
        return Objects.hash(one, two, mybits, three, four, valueLeafFlags);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof TestOpParam) {
            TestOpParam other = (TestOpParam) obj;
            return
                Objects.equals(one, other.one) &&
                Objects.equals(two, other.two) &&
                Objects.equals(mybits, other.mybits) &&
                Objects.equals(three, other.three) &&
                Objects.equals(four, other.four) &&
                Objects.equals(valueLeafFlags, other.valueLeafFlags);
        }
        return false;
    }

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(getClass())
            .omitNullValues()
            .add("one", one)
            .add("two", two)
            .add("mybits", mybits)
            .add("three", three)
            .add("four", four)
            .add("valueLeafFlags", valueLeafFlags)
            .toString();
    }

    /**
     * Creates an instance of testOpParam.
     */
    public TestOpParam() {
    }


    @Override
    public boolean isLeafValueSet(LeafIdentifier leaf) {
        return valueLeafFlags.get(leaf.getLeafIndex());
    }


    @Override
    public void addAugmentation(InnerModelObject obj) {
    }

    @Override
    public void removeAugmentation(InnerModelObject obj) {
    }

    @Override
    public Map<Class<? extends InnerModelObject>, InnerModelObject> augmentations() {

        return null;
    }

    @Override
    public <T extends InnerModelObject> T augmentation(Class<T> c) {

        return null;
    }
}

File : test.yang

module test {

    yang-version 1;
    namespace "http://huawei.com";
    prefix "test";

    typedef percent {
        type uint8;
           description "Percentage";
    }

    leaf completed {
        type percent;
    }
}

File : Percent.java
package org.onosproject.yang.gen.v1.http.huawei.com.test;

import java.util.Objects;

/**
 * Represents the implementation of percent.
 */
public final class Percent {

    private short uint8;

    /**
     * Creates an instance of percent.
     */
    private Percent() {
    }

    /**
     * Creates an instance of uint8.
     *
     * @param uint8 value of uint8
     */
    public Percent(short uint8) {
        this.uint8 = uint8;
    }

    /**
     * Returns the object of percent for type uint8.
     *
     * @param value value of percent for type uint8
     * @return percent for type uint8
     */
    public static Percent of(short value) {
        return new Percent(value);
    }

    /**
     * Returns the attribute uint8.
     *
     * @return uint8 value of uint8
     */
    public short uint8() {
        return uint8;
    }
    /**
     * Sets the attribute uint8.
     *
     * @param uint8 value of uint8
     */
    public void uint8(short uint8) {
        this.uint8 = uint8;
    }

    @Override
    public int hashCode() {
        return Objects.hash(uint8);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof Percent) {
            Percent other = (Percent) obj;
            return
                Objects.equals(uint8, other.uint8);
        }
        return false;
    }

    @Override
    public String toString() {
        return String.valueOf(uint8);
    }
    /**
     * Returns the object of percent fromString input String percent.
     *
     * @param valInString value of input String
     * @return percent
     */
    public static Percent fromString(String valInString) {
        try {
            short tmpVal = Short.parseShort(valInString);
            return of(tmpVal);
        } catch (Exception e) {
            throw new IllegalArgumentException("not a valid input element");
        }
    }
}

File: test.yang
module Test {

    yang-version 1;
    namespace "http://huawei.com";
    prefix Ant;
    description "Interval before a route is declared invalid";

    leaf  packetType {
         type enumeration {
             enum "unbounded";
             enum ZERO;
           enum two;
             enum four;
         }         
       }
}

File : PacketTypeEnum.java

package org.onosproject.yang.gen.v1.http.huawei.com.test;

/**
 * Represents ENUM data of packetTypeEnum.
 */
public enum PacketTypeEnum {

    /**
     * Represents unbounded.
     */
    UNBOUNDED(0, "unbounded"),

    /**
     * Represents zERO.
     */
    ZERO(1, "ZERO"),

    /**
     * Represents two.
     */
    TWO(2, "two"),

    /**
     * Represents four.
     */
    FOUR(3, "four");

    private int packetTypeEnum;
    private String schemaName;

    /**
     * Creates an instance of packetTypeEnum.
     *
     * @param packetTypeEnum value of packetTypeEnum
     */
     PacketTypeEnum(int packetTypeEnum, String schemaName) {
        this.packetTypeEnum = packetTypeEnum;
        this.schemaName = schemaName;
    }

    /**
     * Returns the object of packetTypeEnum for.
     *
     * @param value value of packetTypeEnum for
     * @return packetTypeEnum for
     */
    public static PacketTypeEnum of(int value) {
        switch (value) {
            case 0:
                return PacketTypeEnum.UNBOUNDED;
            case 1:
                return PacketTypeEnum.ZERO;
            case 2:
                return PacketTypeEnum.TWO;
            case 3:
                return PacketTypeEnum.FOUR;
            default :
                throw new IllegalArgumentException("not a valid input element");
        }
    }
    /**
     * Returns the object of packetTypeEnum for.
     *
     * @param value value of packetTypeEnum for
     * @return packetTypeEnum for
     */
    public static PacketTypeEnum of(String value) {
        switch (value) {
            case "unbounded":
                return PacketTypeEnum.UNBOUNDED;
            case "ZERO":
                return PacketTypeEnum.ZERO;
            case "two":
                return PacketTypeEnum.TWO;
            case "four":
                return PacketTypeEnum.FOUR;
            default :
                throw new IllegalArgumentException("not a valid input element");
        }
    }
    /**
     * Returns the attribute packetTypeEnum.
     *
     * @return packetTypeEnum value of packetTypeEnum
     */
    public int packetTypeEnum() {
        return packetTypeEnum;
    }


    @Override
    public String toString() {
        return schemaName;
    }
}

File : test.yang
module test {
    yang-version 1;
    namespace "http://huawei.com";
    prefix "test";

    typedef ip-address {
        type union {
            type int32;
            type uint32;
        }
    }
}

File : IpAddressUnion.java
package org.onosproject.yang.gen.v1.http.huawei.com.test.ipaddress;

import java.util.Objects;
import java.util.BitSet;

/**
 * Represents the implementation of ipAddressUnion.
 */
public final class IpAddressUnion {
    private int int32;
    private long uint32;
    private BitSet setValue = new BitSet();

    /**
     * Creates an instance of ipAddressUnion.
     */
    private IpAddressUnion() {
    }

    /**
     * Creates an instance of int32.
     *
     * @param int32 value of int32
     */
    public IpAddressUnion(int int32) {
        setValue.set(0);
        this.int32 = int32;
    }

    /**
     * Creates an instance of uint32.
     *
     * @param uint32 value of uint32
     */
    public IpAddressUnion(long uint32) {
        setValue.set(1);
        this.uint32 = uint32;
    }

    /**
     * Returns the object of ipAddressUnion for type int32.
     *
     * @param value value of ipAddressUnion for type int32
     * @return ipAddressUnion for type int32
     */
    public static IpAddressUnion of(int value) {
        return new IpAddressUnion(value);
    }

    /**
     * Returns the object of ipAddressUnion for type uint32.
     *
     * @param value value of ipAddressUnion for type uint32
     * @return ipAddressUnion for type uint32
     */
    public static IpAddressUnion of(long value) {
        return new IpAddressUnion(value);
    }

    /**
     * Returns the attribute int32.
     *
     * @return int32 value of int32
     */
    public int int32() {
        return int32;
    }
    /**
     * Returns the attribute uint32.
     *
     * @return uint32 value of uint32
     */
    public long uint32() {
        return uint32;
    }
    /**
     * Sets the attribute int32.
     *
     * @param int32 value of int32
     */
    public void int32(int int32) {
        this.int32 = int32;
    }
    /**
     * Sets the attribute uint32.
     *
     * @param uint32 value of uint32
     */
    public void uint32(long uint32) {
        this.uint32 = uint32;
    }

    @Override
    public int hashCode() {
        return Objects.hash(int32, uint32);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof IpAddressUnion) {
            IpAddressUnion other = (IpAddressUnion) obj;
            return
                Objects.equals(int32, other.int32) &&
                Objects.equals(uint32, other.uint32);
        }
        return false;
    }

    @Override
    public String toString() {
        if (setValue.get(0)) {
            return String.valueOf(int32);
        }
        if (setValue.get(1)) {
            return String.valueOf(uint32);
        }
        return null;
    }
    /**
     * Returns the object of ipAddressUnion fromString input String ipAddressUnion.
     *
     * @param valInString value of input String
     * @return ipAddressUnion
     */
    public static IpAddressUnion fromString(String valInString) {
        try {
            int tmpVal = Integer.parseInt(valInString);
            return of(tmpVal);
        } catch (Exception e) {
        }
        try {
            long tmpVal = Long.parseLong(valInString);
            return of(tmpVal);
        } catch (Exception e) {
            throw new IllegalArgumentException("not a valid input element");
        }
    }
}

File : test.yang
module test {
    yang-version 1;
    namespace "http://huawei.com";
    prefix "test";

    typedef ip-address {
        type union {
            type int32;
            type uint16;
            type int64;
            type uint32;
            type string;
        }
    }
}

File : IpAddressUnion.java

package org.onosproject.yang.gen.v1.http.huawei.com.test.ipaddress;

import java.math.BigInteger;
import java.util.BitSet;
import java.util.Objects;

/**
 * Represents the implementation of ipAddressUnion.
 */
public final class IpAddressUnion {
    private static final int INT32_MIN_RANGE = -2147483648;
    private static final int INT32_MAX_RANGE = 2147483647;
    private static final BigInteger INT64_MIN_RANGE = new BigInteger("-9223372036854775808");
    private static final BigInteger INT64_MAX_RANGE = new BigInteger("9223372036854775807");
    private int int32;
    private int uint16;
    private long int64;
    private long uint32;
    private String string;
    private BitSet setValue = new BitSet();

    /**
     * Creates an instance of ipAddressUnion.
     */
    private IpAddressUnion() {
    }

    /**
     * Creates an instance of string.
     *
     * @param string value of string
     */
    public IpAddressUnion(String string) {
        setValue.set(4);
        this.string = string;
    }

    /**
     * Creates an instance of int32.
     *
     * @param int32 value of int32
     */
    public IpAddressUnion(int int32) {
        setValue.set(0);
        if (validateRange(INT32_MIN_RANGE, INT32_MAX_RANGE, int32)) {
            this.int32 = int32;
        } else {
            this.uint16 = int32;
    }
        }

    /**
     * Creates an instance of int64.
     *
     * @param int64 value of int64
     */
    public IpAddressUnion(long int64) {
        setValue.set(2);
        if (validateRange(INT64_MIN_RANGE, INT64_MAX_RANGE, int64)) {
            this.int64 = int64;
        } else {
            this.uint32 = int64;
    }
        }

    /**
     * Returns the object of ipAddressUnion for type string.
     *
     * @param value value of ipAddressUnion for type string
     * @return ipAddressUnion for type string
     */
    public static IpAddressUnion of(String value) {
        return new IpAddressUnion(value);
    }

    /**
     * Returns the object of ipAddressUnion for type int32.
     *
     * @param value value of ipAddressUnion for type int32
     * @return ipAddressUnion for type int32
     */
    public static IpAddressUnion of(int value) {
        return new IpAddressUnion(value);
    }

    /**
     * Returns the object of ipAddressUnion for type int64.
     *
     * @param value value of ipAddressUnion for type int64
     * @return ipAddressUnion for type int64
     */
    public static IpAddressUnion of(long value) {
        return new IpAddressUnion(value);
    }

    /**
     * Returns the attribute int32.
     *
     * @return int32 value of int32
     */
    public int int32() {
        return int32;
    }
    /**
     * Returns the attribute int64.
     *
     * @return int64 value of int64
     */
    public long int64() {
        return int64;
    }
    /**
     * Returns the attribute string.
     *
     * @return string value of string
     */
    public String string() {
        return string;
    }
    /**
     * Sets the attribute int32.
     *
     * @param int32 value of int32
     */
    public void int32(int int32) {
        this.int32 = int32;
    }
    /**
     * Sets the attribute uint16.
     *
     * @param uint16 value of uint16
     */
    public void uint16(int uint16) {
        this.uint16 = uint16;
    }
    /**
     * Sets the attribute int64.
     *
     * @param int64 value of int64
     */
    public void int64(long int64) {
        this.int64 = int64;
    }
    /**
     * Sets the attribute uint32.
     *
     * @param uint32 value of uint32
     */
    public void uint32(long uint32) {
        this.uint32 = uint32;
    }
    /**
     * Sets the attribute string.
     *
     * @param string value of string
     */
    public void string(String string) {
        this.string = string;
    }

    @Override
    public int hashCode() {
        return Objects.hash(int32, uint16, int64, uint32, string);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof IpAddressUnion) {
            IpAddressUnion other = (IpAddressUnion) obj;
            return
                Objects.equals(int32, other.int32) &&
                Objects.equals(uint16, other.uint16) &&
                Objects.equals(int64, other.int64) &&
                Objects.equals(uint32, other.uint32) &&
                Objects.equals(string, other.string);
        }
        return false;
    }

    @Override
    public String toString() {
        if (setValue.get(0)) {
            return String.valueOf(int32);
        }
        if (setValue.get(1)) {
            return String.valueOf(uint16);
        }
        if (setValue.get(2)) {
            return String.valueOf(int64);
        }
        if (setValue.get(3)) {
            return String.valueOf(uint32);
        }
        if (setValue.get(4)) {
            return string;
        }
        return null;
    }
    /**
     * Returns the object of ipAddressUnion fromString input String ipAddressUnion.
     *
     * @param valInString value of input String
     * @return ipAddressUnion
     */
    public static IpAddressUnion fromString(String valInString) {
        try {
            int tmpVal = Integer.parseInt(valInString);
            return of(tmpVal);
        } catch (Exception e) {
        }
        try {
            long tmpVal = Long.parseLong(valInString);
            return of(tmpVal);
        } catch (Exception e) {
        }
        try {
            String tmpVal = (valInString);
            return of(tmpVal);
        } catch (Exception e) {
            throw new IllegalArgumentException("not a valid input element");
        }
    }
    /**
     * Validates if value is in given range.validateRange.
     *
     * @param minRange value of minRange
     * @param minRange value of maxRange
     * @return  true if value is in range
     */
    private boolean validateRange(int minRange, int maxRange, int value) {
        return value >= minRange && value <= maxRange;
    }
    /**
     * Validates if value is in given range.validateRange.
     *
     * @param minRange value of minRange
     * @param minRange value of maxRange
     * @return  true if value is in range
     */
    private boolean validateRange(BigInteger minRange, BigInteger maxRange, long value) {
        BigInteger bigInteger = new BigInteger(" " + value);
        return bigInteger.compareTo(minRange) == 1 && bigInteger.compareTo(maxRange) == 1;
    }
}