    001/*
    002 * Copyright (c) 2007-2017 Xplenty, 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 abstract class BaseAnnotatedElementGraph extends BaseElementGraph implements AnnotatedGraph
    030  {
    031  protected EnumMultiMap<FlowElement> annotations;
    032
    033  public boolean hasAnnotations()
    034    {
    035    return annotations != null && !annotations.isEmpty();
    036    }
    037
    038  public EnumMultiMap<FlowElement> getAnnotations()
    039    {
    040    if( annotations == null )
    041      annotations = new EnumMultiMap<>();
    042
    043    return annotations;
    044    }
    045
    046  protected void addParentAnnotations( ElementGraph parent )
    047    {
    048    if( parent instanceof AnnotatedGraph && ( ( (AnnotatedGraph) parent ) ).hasAnnotations() )
    049      getAnnotations().addAll( ( (AnnotatedGraph) parent ).getAnnotations() );
    050    }
    051
    052  @Override
    053  public int hashCode()
    054    {
    055    int result = super.hashCode();
    056    result = 31 * result + ( annotations != null ? annotations.hashCode() : 0 );
    057    return result;
    058    }
    059  }