| /** |
| * 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. |
| */ |
| package org.apache.atlas.util; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.atlas.v1.model.instance.Referenceable; |
| import org.apache.atlas.repository.graph.GraphHelper; |
| |
| /** |
| * Map of attribute values to a collection of IndexedInstances with that attribute value. |
| * |
| * @see GraphHelper#getVerticesForInstancesByUniqueAttributes |
| * |
| */ |
| public class AttributeValueMap { |
| |
| //need collection in case they are adding the same entity twice? |
| private Map<Object,Collection<IndexedInstance>> valueMap_ = new HashMap<>(); |
| |
| public void put(Object value, Referenceable instance, int index) { |
| IndexedInstance wrapper = new IndexedInstance(instance, index); |
| Collection<IndexedInstance> existingValues = valueMap_.get(value); |
| if(existingValues == null) { |
| //only expect 1 value |
| existingValues = new HashSet<>(1); |
| valueMap_.put(value, existingValues); |
| } |
| existingValues.add(wrapper); |
| } |
| |
| public Collection<IndexedInstance> get(Object value) { |
| return valueMap_.get(value); |
| } |
| |
| |
| public Set<Object> getAttributeValues() { |
| return valueMap_.keySet(); |
| } |
| |
| } |