1 files changed, 60 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6-TUSCANY-3909/domain-search/src/main/java/org/apache/tuscany/sca/domain/search/DocumentMap.java b/sca-java-1.x/tags/1.6-TUSCANY-3909/domain-search/src/main/java/org/apache/tuscany/sca/domain/search/DocumentMap.java
new file mode 100644
index 0000000000..47deb41a6f
--- /dev/null
+++ b/sca-java-1.x/tags/1.6-TUSCANY-3909/domain-search/src/main/java/org/apache/tuscany/sca/domain/search/DocumentMap.java
@@ -0,0 +1,60 @@
+/*
+ * 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.domain.search;
+
+import java.util.HashMap;
+
+import org.apache.tuscany.sca.domain.search.impl.Document;
+
+/**
+ * A map that holds a collection of {@link Document}s. Each {@link Document} key
+ * should ideally be something that is unique across the entire contribution
+ * documents. This class overrides {@link HashMap#get(Object)} method, so it
+ * adds an empty {@link Document} object if the specified key is not found in
+ * the map.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class DocumentMap extends HashMap<Object, Document> {
+
+    private static final long serialVersionUID = -2402910290314939928L;
+
+    /**
+     * Returns a {@link Document} object mapped from the specified key. If no
+     * {@link Document} object is found from the specified key, a empty
+     * {@link Document} object is created and added to the map.
+     * 
+     * @param key the {@link Document} key
+     * @return the {@link Document} object mapped from the key
+     */
+    @Override
+    public Document get(Object key) {
+        Document doc = super.get(key);
+
+        if (doc == null) {
+            doc = new Document();
+            put(key, doc);
+
+        }
+
+        return doc;
+
+    }
+
+}