content: package org.apache.archiva.model;
  
  /*
   * 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.commons.lang3.StringUtils;
  
  /**
   * Keys - utility methods for converting common objects into string keys. 
   *
   *
   */
  public class Keys
  {
      public static String toKey( String groupId, String artifactId, String version, String classifier, String type )
      {
          StringBuilder key = new StringBuilder();
  
          key.append( groupId ).append( ":" );
          key.append( artifactId ).append( ":" );
          key.append( version ).append( ":" );
          key.append( StringUtils.defaultString( classifier ) ).append( ":" );
          key.append( type );
  
          return key.toString();
      }
  
      public static String toKey( ArtifactReference ref )
      {
          return toKey( ref.getGroupId(), ref.getArtifactId(), ref.getVersion(), ref.getClassifier(), ref.getType() );
      }
  
      public static String toKey( ProjectReference ref )
      {
          StringBuilder key = new StringBuilder();
  
          key.append( ref.getGroupId() ).append( ":" );
          key.append( ref.getArtifactId() );
  
          return key.toString();
      }
  
      public static String toKey( String groupId, String artifactId, String version )
      {
          StringBuilder key = new StringBuilder();
  
          key.append( groupId ).append( ":" );
          key.append( artifactId ).append( ":" );
          key.append( version );
  
          return key.toString();
      }
      
      public static String toKey( VersionedReference ref )
      {
          return toKey( ref.getGroupId(), ref.getArtifactId(), ref.getVersion() );
      }
  }
  