pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/util/DummyConcurrentLock.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/util/DummyConcurrentLock.java
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+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/util/DummyConcurrentLock.java
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+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.concurrent.TimeUnit;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * A dummy lock as a replacement for {@link ReentrantLock} to disable locking
+ * @lucene.internal
+ */
+public final class DummyConcurrentLock implements Lock {
+
+  /** a default instance, can be always used, as this {@link Lock} is stateless. */
+  public static final DummyConcurrentLock INSTANCE = new DummyConcurrentLock();
+
+  public void lock() {}
+  
+  public void lockInterruptibly() {}
+  
+  public boolean tryLock() {
+    return true;
+  }
+  
+  public boolean tryLock(long time, TimeUnit unit) {
+    return true;
+  }
+  
+  public void unlock() {}
+  
+  public Condition newCondition() {
+    throw new UnsupportedOperationException();
+  }
+
+}