content: package org.apache.archiva.repository.content.base;
  
  /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  import org.apache.archiva.repository.ManagedRepositoryContent;
  import org.apache.archiva.repository.content.Namespace;
  import org.apache.archiva.repository.content.Project;
  import org.apache.archiva.repository.content.Version;
  import org.apache.archiva.repository.content.base.builder.VersionOptBuilder;
  import org.apache.archiva.repository.content.base.builder.WithAssetBuilder;
  import org.apache.archiva.repository.content.base.builder.WithProjectBuilder;
  import org.apache.archiva.repository.content.base.builder.WithVersionBuilder;
  import org.apache.archiva.repository.storage.StorageAsset;
  import org.apache.commons.lang3.StringUtils;
  
  import java.util.Arrays;
  import java.util.List;
  import java.util.regex.PatternSyntaxException;
  
  /**
   * Immutable version instance.
   * <p>
   * You have to use the builder method to create instances of this version object.
   * <p>
   * The project and the version string are required attributes of this instance additional to the base
   * attributes repository and asset.
   * <p>
   * Two instances are equal, if the project and the version match in addition to the base attributes repository and asset.
   */
  public class ArchivaVersion extends BaseContentItem implements Version
  {
  
      private String version;
      private Project project;
      private String separatorExpression = "\\.";
      private List<String> versionSegments;
  
      private ArchivaVersion( )
      {
  
      }
  
      /**
       * Creates a new builder for creating new version instances. You have to provide the required
       * attributes before the build() method can be called.
       *
       * @param storageAsset the storage asset
       * @return the builder for creating new version instances
       */
      public static WithProjectBuilder withAsset( StorageAsset storageAsset )
      {
          return new Builder( ).withAsset( storageAsset );
      }
  
      public static WithAssetBuilder<WithProjectBuilder> withRepository( ManagedRepositoryContent repository )
      {
          return new ArchivaVersion.Builder( ).withRepository( repository );
      }
  
      @Override
      public List<String> getVersionSegments( )
      {
          return versionSegments;
      }
  
      @Override
      public String getId( )
      {
          return version;
      }
  
      @Override
      public Project getProject( )
      {
          return project;
      }
  
      @Override
      public Namespace getNamespace( )
      {
          return project.getNamespace( );
      }
  
      @Override
      public boolean equals( Object o )
      {
          if ( this == o ) return true;
          if ( o == null || getClass( ) != o.getClass( ) ) return false;
  
          ArchivaVersion that = (ArchivaVersion) o;
          if (!repository.equals( that.repository )) return false;
          if ( !version.equals( that.version ) ) return false;
          return project.equals( that.project );
      }
  
      @Override
      public int hashCode( )
      {
          int result = super.hashCode( );
          result = 31 * result + version.hashCode( );
          result = 31 * result + project.hashCode( );
          return result;
      }
  
      @Override
      public String toString( )
      {
          return "ArchivaVersion{ "+version+", project="+project.toString()+"}";
      }
  
      private static final class Builder extends ContentItemBuilder<ArchivaVersion, VersionOptBuilder, WithProjectBuilder>
          implements WithProjectBuilder, WithVersionBuilder, VersionOptBuilder
      {
  
          Builder( )
          {
              super( new ArchivaVersion( ) );
          }
  
          @Override
          protected WithProjectBuilder getNextBuilder( )
          {
              return this;
          }
  
          @Override
          protected VersionOptBuilder getOptBuilder( )
          {
              return this;
          }
  
          @Override
          public VersionOptBuilder withVersion( String version )
          {
              if ( StringUtils.isEmpty( version ) )
              {
                  throw new IllegalArgumentException( "Version parameter must not be empty or null." );
              }
              item.version = version;
              updateVersionSegments( );
              return this;
          }
  
  
          private void updateVersionSegments( )
          {
              item.versionSegments = Arrays.asList( item.version.split( item.separatorExpression ) );
          }
  
          @Override
          public WithVersionBuilder withProject( Project project )
          {
              if ( project == null )
              {
                  throw new IllegalArgumentException( "Project may not be null" );
              }
              item.project = project;
              super.setRepository( project.getRepository( ) );
              return this;
          }
  
          @Override
          public ArchivaVersion build( )
          {
              super.build( );
              return item;
          }
  
          @Override
          public VersionOptBuilder withSeparatorExpression( String expression )
          {
              if ( StringUtils.isEmpty( expression ) )
              {
                  throw new IllegalArgumentException( "Separator expression may not be null or empty" );
              }
              this.item.separatorExpression = expression;
              try
              {
                  updateVersionSegments( );
              }
              catch ( PatternSyntaxException e )
              {
                  throw new IllegalArgumentException( "Bad separator expression " + expression + ": " + e.getMessage( ), e );
              }
              return this;
          }
      }
  
  }
  