pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / store / NoLockFactory.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/store/NoLockFactory.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/store/NoLockFactory.java
new file mode 100755 (executable)
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+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/store/NoLockFactory.java
@@ -0,0 +1,77 @@
+package org.apache.lucene.store;
+
+/**
+ * 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;
+
+/**
+ * Use this {@link LockFactory} to disable locking entirely.
+ * Only one instance of this lock is created.  You should call {@link
+ * #getNoLockFactory()} to get the instance.
+ *
+ * @see LockFactory
+ */
+
+public class NoLockFactory extends LockFactory {
+
+  // Single instance returned whenever makeLock is called.
+  private static NoLock singletonLock = new NoLock();
+  private static NoLockFactory singleton = new NoLockFactory();
+  
+  /**
+   * @deprecated This constructor was not intended to be public and should not be used.
+   *  It will be made private in Lucene 4.0
+   * @see #getNoLockFactory()
+   */
+  // make private in 4.0!
+  @Deprecated
+  public NoLockFactory() {}
+
+  public static NoLockFactory getNoLockFactory() {
+    return singleton;
+  }
+
+  @Override
+  public Lock makeLock(String lockName) {
+    return singletonLock;
+  }
+
+  @Override
+  public void clearLock(String lockName) {}
+}
+
+class NoLock extends Lock {
+  @Override
+  public boolean obtain() throws IOException {
+    return true;
+  }
+
+  @Override
+  public void release() {
+  }
+
+  @Override
+  public boolean isLocked() {
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return "NoLock";
+  }
+}