// =================== DO NOT EDIT THIS FILE ====================
   //  Generated by Modello Velocity from model.vm
   //  template, any modifications will be overwritten.
   // ==============================================================
   package org.apache.maven.api.model;
   
   import java.io.Serializable;
   import java.util.Collections;
   import java.util.HashMap;
  import java.util.Map;
  import org.apache.maven.api.annotations.Experimental;
  import org.apache.maven.api.annotations.Generated;
  import org.apache.maven.api.annotations.Immutable;
  import org.apache.maven.api.annotations.Nonnull;
  import org.apache.maven.api.annotations.NotThreadSafe;
  import org.apache.maven.api.annotations.ThreadSafe;
  
  /**
   * Describes a build extension to utilise.
   */
  @Experimental
  @Generated @ThreadSafe @Immutable
  public class Extension
      implements Serializable, InputLocationTracker
  {
      /**
       * The group ID of the extension's artifact.
       */
      final String groupId;
      /**
       * The artifact ID of the extension.
       */
      final String artifactId;
      /**
       * The version of the extension.
       */
      final String version;
      /** Location of the xml element for this object. */
      final InputLocation location;
      /** Location of the xml element for the field groupId. */
      final InputLocation groupIdLocation;
      /** Location of the xml element for the field artifactId. */
      final InputLocation artifactIdLocation;
      /** Location of the xml element for the field version. */
      final InputLocation versionLocation;
      /** Other locations */
      final Map<Object, InputLocation> locations;
  
      /**
        * Constructor for this class, package protected.
        * @see Builder#build()
        */
      Extension(
          String groupId,
          String artifactId,
          String version,
          Map<Object, InputLocation> locations,
          InputLocation location,
          InputLocation groupIdLocation,
          InputLocation artifactIdLocation,
          InputLocation versionLocation
      )
      {
          this.groupId = groupId;
          this.artifactId = artifactId;
          this.version = version;
          this.locations = ImmutableCollections.copy( locations );
          this.location = location;
          this.groupIdLocation = groupIdLocation;
          this.artifactIdLocation = artifactIdLocation;
          this.versionLocation = versionLocation;
      }
  
      /**
       * The group ID of the extension's artifact.
       *
       * @return a {@code String}
       */
      public String getGroupId()
      {
          return this.groupId;
      }
  
      /**
       * The artifact ID of the extension.
       *
       * @return a {@code String}
       */
      public String getArtifactId()
      {
          return this.artifactId;
      }
  
      /**
       * The version of the extension.
       *
       * @return a {@code String}
       */
      public String getVersion()
     {
         return this.version;
     }
 
     /**
      * Gets the location of the specified field in the input source.
      */
     public InputLocation getLocation( Object key )
     {
         if ( key instanceof String )
         {
             switch ( ( String ) key )
             {
                 case "":
                     return location;
                 case "groupId":
                     return groupIdLocation;
                 case "artifactId":
                     return artifactIdLocation;
                 case "version":
                     return versionLocation;
             }
         }
         return locations != null ? locations.get( key ) : null;
     }
 
     /**
      * Creates a new builder with this object as the basis.
      *
      * @return a {@code Builder}
      */
     @Nonnull
     public Builder with()
     {
         return newBuilder( this );
     }
     /**
      * Creates a new {@code Extension} instance using the specified groupId.
      *
      * @param groupId the new {@code String} to use
      * @return a {@code Extension} with the specified groupId
      */
     @Nonnull
     public Extension withGroupId( String groupId )
     {
         return with().groupId( groupId ).build();
     }
     /**
      * Creates a new {@code Extension} instance using the specified artifactId.
      *
      * @param artifactId the new {@code String} to use
      * @return a {@code Extension} with the specified artifactId
      */
     @Nonnull
     public Extension withArtifactId( String artifactId )
     {
         return with().artifactId( artifactId ).build();
     }
     /**
      * Creates a new {@code Extension} instance using the specified version.
      *
      * @param version the new {@code String} to use
      * @return a {@code Extension} with the specified version
      */
     @Nonnull
     public Extension withVersion( String version )
     {
         return with().version( version ).build();
     }
 
     /**
      * Creates a new {@code Extension} instance.
      * Equivalent to {@code newInstance( true )}.
      * @see #newInstance(boolean)
      *
      * @return a new {@code Extension}
      */
     @Nonnull
     public static Extension newInstance()
     {
         return newInstance( true );
     }
 
     /**
      * Creates a new {@code Extension} instance using default values or not.
      * Equivalent to {@code newBuilder( withDefaults ).build()}.
      *
      * @param withDefaults the boolean indicating whether default values should be used
      * @return a new {@code Extension}
      */
     @Nonnull
     public static Extension newInstance( boolean withDefaults )
     {
         return newBuilder( withDefaults ).build();
     }
 
     /**
      * Creates a new {@code Extension} builder instance.
      * Equivalent to {@code newBuilder( true )}.
      * @see #newBuilder(boolean)
      *
      * @return a new {@code Builder}
      */
     @Nonnull
     public static Builder newBuilder()
     {
         return newBuilder( true );
     }
 
     /**
      * Creates a new {@code Extension} builder instance using default values or not.
      *
      * @param withDefaults the boolean indicating whether default values should be used
      * @return a new {@code Builder}
      */
     @Nonnull
     public static Builder newBuilder( boolean withDefaults )
     {
         return new Builder( withDefaults );
     }
 
     /**
      * Creates a new {@code Extension} builder instance using the specified object as a basis.
      * Equivalent to {@code newBuilder( from, false )}.
      *
      * @param from the {@code Extension} instance to use as a basis
      * @return a new {@code Builder}
      */
     @Nonnull
     public static Builder newBuilder( Extension from )
     {
         return newBuilder( from, false );
     }
 
     /**
      * Creates a new {@code Extension} builder instance using the specified object as a basis.
      *
      * @param from the {@code Extension} instance to use as a basis
      * @param forceCopy the boolean indicating if a copy should be forced
      * @return a new {@code Builder}
      */
     @Nonnull
     public static Builder newBuilder( Extension from, boolean forceCopy )
     {
         return new Builder( from, forceCopy );
     }
 
     /**
      * Builder class used to create Extension instances.
      * @see #with()
      * @see #newBuilder()
      */
     @NotThreadSafe
     public static class Builder
     {
         Extension base;
         String groupId;
         String artifactId;
         String version;
         Map<Object, InputLocation> locations;
 
         Builder( boolean withDefaults )
         {
             if ( withDefaults )
             {
             }
         }
 
         Builder( Extension base, boolean forceCopy )
         {
             if ( forceCopy )
             {
                 this.groupId = base.groupId;
                 this.artifactId = base.artifactId;
                 this.version = base.version;
             }
             else
             {
                 this.base = base;
             }
         }
 
         @Nonnull
         public Builder groupId( String groupId )
         {
             this.groupId = groupId;
             return this;
         }
 
         @Nonnull
         public Builder artifactId( String artifactId )
         {
             this.artifactId = artifactId;
             return this;
         }
 
         @Nonnull
         public Builder version( String version )
         {
             this.version = version;
             return this;
         }
 
 
         @Nonnull
         public Builder location( Object key, InputLocation location )
         {
             if ( location != null )
             {
                 if ( this.locations == null )
                 {
                     this.locations = new HashMap<>();
                 }
                 this.locations.put( key, location );
             }
             return this;
         }
 
         @Nonnull
         public Extension build()
         {
             if ( base != null
                     && ( groupId == null || groupId == base.groupId )
                     && ( artifactId == null || artifactId == base.artifactId )
                     && ( version == null || version == base.version )
             )
             {
                 return base;
             }
             Map<Object, InputLocation> locations = null;
             InputLocation location = null;
             InputLocation groupIdLocation = null;
             InputLocation artifactIdLocation = null;
             InputLocation versionLocation = null;
             if ( this.locations != null )
             {
                 locations = this.locations;
                 location = locations.remove( "" );
                 groupIdLocation = locations.remove( "groupId" );
                 artifactIdLocation = locations.remove( "artifactId" );
                 versionLocation = locations.remove( "version" );
             }
             return new Extension(
                 groupId != null ? groupId : ( base != null ? base.groupId : null ),
                 artifactId != null ? artifactId : ( base != null ? base.artifactId : null ),
                 version != null ? version : ( base != null ? base.version : null ),
                 locations != null ? locations : ( base != null ? base.locations : null ),
                 location != null ? location : ( base != null ? base.location : null ),
                 groupIdLocation != null ? groupIdLocation : ( base != null ? base.groupIdLocation : null ),
                 artifactIdLocation != null ? artifactIdLocation : ( base != null ? base.artifactIdLocation : null ),
                 versionLocation != null ? versionLocation : ( base != null ? base.versionLocation : null )
             );
         }
     }
 
 
             
     /**
      * @see java.lang.Object#equals(java.lang.Object)
      */
     public boolean equals( Object o )
     {
         if ( this == o )
         {
             return true;
         }
 
         if ( !( o instanceof Extension ) )
         {
             return false;
         }
 
         Extension e = (Extension) o;
 
         if ( !equal( e.getArtifactId(), getArtifactId() ) )
         {
             return false;
         }
         else if ( !equal( e.getGroupId(), getGroupId() ) )
         {
             return false;
         }
         else if ( !equal( e.getVersion(), getVersion() ) )
         {
             return false;
         }
         return true;
     }
 
     private static <T> boolean equal( T obj1, T obj2 )
     {
         return ( obj1 != null ) ? obj1.equals( obj2 ) : obj2 == null;
     }
 
     /**
      * @see java.lang.Object#hashCode()
      */
     public int hashCode()
     {
         int result = 17;
         result = 37 * result + ( getArtifactId() != null ? getArtifactId().hashCode() : 0 );
         result = 37 * result + ( getGroupId() != null ? getGroupId().hashCode() : 0 );
         result = 37 * result + ( getVersion() != null ? getVersion().hashCode() : 0 );
         return result;
     }
             
           
 }