001/*
002 * Copyright (c) 2007-2015 Concurrent, Inc. All Rights Reserved.
003 *
004 * Project and contact information: http://www.cascading.org/
005 *
006 * This file is part of the Cascading project.
007 *
008 * Licensed under the Apache License, Version 2.0 (the "License");
009 * you may not use this file except in compliance with the License.
010 * You may obtain a copy of the License at
011 *
012 *     http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing, software
015 * distributed under the License is distributed on an "AS IS" BASIS,
016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017 * See the License for the specific language governing permissions and
018 * limitations under the License.
019 */
020
021package cascading.flow.planner.graph;
022
023import cascading.flow.FlowElement;
024import cascading.util.EnumMultiMap;
025
026/**
027 *
028 */
029public class AnnotatedDecoratedElementGraph extends DecoratedElementGraph implements AnnotatedGraph
030  {
031  private final EnumMultiMap<FlowElement> annotations;
032
033  public AnnotatedDecoratedElementGraph( ElementGraph decorated, EnumMultiMap<FlowElement> annotations )
034    {
035    super( decorated );
036
037    if( annotations == null )
038      throw new IllegalArgumentException( "annotations are required" );
039
040    this.annotations = annotations;
041    }
042
043  @Override
044  public boolean hasAnnotations()
045    {
046    return annotations != null && !annotations.isEmpty();
047    }
048
049  @Override
050  public EnumMultiMap<FlowElement> getAnnotations()
051    {
052    return annotations;
053    }
054
055  @Override
056  public int hashCode()
057    {
058    int result = super.hashCode();
059    result = 31 * result + ( annotations != null ? annotations.hashCode() : 0 );
060    return result;
061    }
062  }