pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / index / NoDeletionPolicy.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/NoDeletionPolicy.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/NoDeletionPolicy.java
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+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/NoDeletionPolicy.java
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+package org.apache.lucene.index;
+
+/**
+ * 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.io.IOException;
+import java.util.List;
+
+/**
+ * An {@link IndexDeletionPolicy} which keeps all index commits around, never
+ * deleting them. This class is a singleton and can be accessed by referencing
+ * {@link #INSTANCE}.
+ */
+public final class NoDeletionPolicy implements IndexDeletionPolicy {
+
+  /** The single instance of this class. */
+  public static final IndexDeletionPolicy INSTANCE = new NoDeletionPolicy();
+  
+  private NoDeletionPolicy() {
+    // keep private to avoid instantiation
+  }
+  
+  public void onCommit(List<? extends IndexCommit> commits) throws IOException {}
+
+  public void onInit(List<? extends IndexCommit> commits) throws IOException {}
+  
+}