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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
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* The contents of this file are subject to the terms of either the GNU
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* General Public License Version 2 only ("GPL") or the Common
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* Development and Distribution License("CDDL") (collectively, the
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* "License"). You may not use this file except in compliance with the
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* License. You can obtain a copy of the License at
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* http://www.netbeans.org/cddl-gplv2.html
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* or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
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* specific language governing permissions and limitations under the
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* License. When distributing the software, include this License Header
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* Notice in each file and include the License file at
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* nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the GPL Version 2 section of the License file that
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* accompanied this code. If applicable, add the following below the
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* License Header, with the fields enclosed by brackets [] replaced by
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* your own identifying information:
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* "Portions Copyrighted [year] [name of copyright owner]"
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* The Original Software is NetBeans. The Initial Developer of the Original
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* Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
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* Microsystems, Inc. All Rights Reserved.
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* If you wish your version of this file to be governed by only the CDDL
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* or only the GPL Version 2, indicate your decision by adding
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* "[Contributor] elects to include this software in this distribution
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* under the [CDDL or GPL Version 2] license." If you do not indicate a
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* single choice of license, a recipient has the option to distribute
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* your version of this file under either the CDDL, the GPL Version 2 or
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* to extend the choice of license to its licensees as provided above.
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* However, if you add GPL Version 2 code and therefore, elected the GPL
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* Version 2 license, then the option applies only if the new code is
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* made subject to such option by the copyright holder.
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package org.netbeans.modules.java.source.usages;
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import java.io.IOException;
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import org.apache.lucene.store.SimpleFSLockFactory;
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import org.openide.filesystems.FileUtil;
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* @author Tomas Zezula
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public class NBLockFactory extends SimpleFSLockFactory {
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private static final String LOCK_DIR = "var"+File.separatorChar+"lock"; //NOI18N
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private static File lockDir;
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/** Creates a new instance of NBLockFactory
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* @throws java.io.IOException
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public NBLockFactory () throws IOException {
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* NEVER call this method! The only place where it's save to
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* call this method is {@link JBrowseModule.restore} to remove
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* orphan locks from previous IDE session.
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public static void clearLocks () {
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if (!Index.isTest()) {
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final File lockDir = getLockDir();
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final File[] children = lockDir.listFiles();
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if (children != null) {
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for (File child : children) {
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private static synchronized File getLockDir () {
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if (lockDir == null) {
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final String nbUserDirProp = Index.getNbUserDir();
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assert nbUserDirProp != null;
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File userDir = new File (nbUserDirProp);
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lockDir = FileUtil.normalizeFile(new File (userDir, LOCK_DIR));
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if (!lockDir.exists()) {
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assert lockDir.isDirectory() && lockDir.canRead() && lockDir.canWrite();