1 files changed, 77 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/collection/CollectionMap.java b/sca-java-2.x/tags/2.0.1-RC1/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/tags/2.0.1-RC1/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>();
+    }
+
+}