pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / util / MapOfSets.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/util/MapOfSets.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/util/MapOfSets.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/util/MapOfSets.java
@@ -0,0 +1,82 @@
+package org.apache.lucene.util;
+
+/**
+ * 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.
+ */
+
+
+import java.util.Set;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Map;
+
+/**
+ * Helper class for keeping Lists of Objects associated with keys. <b>WARNING: THIS CLASS IS NOT THREAD SAFE</b>
+ * @lucene.internal
+ */
+public class MapOfSets<K, V> {
+
+  private final Map<K, Set<V>> theMap;
+
+  /**
+   * @param m the backing store for this object
+   */
+  public MapOfSets(Map<K, Set<V>> m) {
+    theMap = m;
+  }
+
+  /**
+   * @return direct access to the map backing this object.
+   */
+  public Map<K, Set<V>> getMap() {
+    return theMap;
+  }
+
+  /**
+   * Adds val to the Set associated with key in the Map.  If key is not 
+   * already in the map, a new Set will first be created.
+   * @return the size of the Set associated with key once val is added to it.
+   */
+  public int put(K key, V val) {
+    final Set<V> theSet;
+    if (theMap.containsKey(key)) {
+      theSet = theMap.get(key);
+    } else {
+      theSet = new HashSet<V>(23);
+      theMap.put(key, theSet);
+    }
+    theSet.add(val);
+    return theSet.size();
+  }
+   /**
+   * Adds multiple vals to the Set associated with key in the Map.  
+   * If key is not 
+   * already in the map, a new Set will first be created.
+   * @return the size of the Set associated with key once val is added to it.
+   */
+  public int putAll(K key, Collection<? extends V> vals) {
+    final Set<V> theSet;
+    if (theMap.containsKey(key)) {
+      theSet = theMap.get(key);
+    } else {
+      theSet = new HashSet<V>(23);
+      theMap.put(key, theSet);
+    }
+    theSet.addAll(vals);
+    return theSet.size();
+  }
+ 
+}