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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/branches/2.0-Beta1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/collection/CollectionMap.java | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/sca-java-2.x/branches/2.0-Beta1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/collection/CollectionMap.java b/sca-java-2.x/branches/2.0-Beta1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/collection/CollectionMap.java new file mode 100644 index 0000000000..0db80c891d --- /dev/null +++ b/sca-java-2.x/branches/2.0-Beta1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/collection/CollectionMap.java @@ -0,0 +1,77 @@ +/* + * 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.tuscany.sca.common.java.collection; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.concurrent.ConcurrentHashMap; + +/** + * A Map with Collection values + */ +public class CollectionMap<K, V> extends ConcurrentHashMap<K, Collection<V>> { + private static final long serialVersionUID = -8926174610229029369L; + + public boolean putValue(K key, V value) { + Collection<V> collection = get(key); + if (collection == null) { + collection = createCollection(); + put(key, collection); + } + return collection.add(value); + } + + public boolean putValues(K key, Collection<? extends V> value) { + Collection<V> collection = get(key); + if (collection == null) { + collection = createCollection(); + put(key, collection); + } + return collection.addAll(value); + } + + public boolean removeValue(K key, V value) { + return removeValue(key, value, false); + } + + /** + * Remove an entry from the collection for a key + * @param key The key + * @param value The value in the collection + * @param removeEmptyEntry Indicate if the entry should be removed if the collection is empty + * @return + */ + public boolean removeValue(K key, V value, boolean removeEmptyEntry) { + Collection<V> collection = get(key); + if (collection == null) { + return false; + } + boolean result = collection.remove(value); + if(removeEmptyEntry && collection.isEmpty()) { + remove(key); + } + return result; + } + + protected Collection<V> createCollection() { + return new ArrayList<V>(); + } + +} |