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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.versioning.util;
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import org.netbeans.modules.versioning.spi.VersioningSupport;
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import java.util.prefs.Preferences;
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* Collection of Files that has special contracts for add, remove and contains methods, see below.
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* @author Maros Sandor
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public class FileCollection {
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private static final char FLAT_FOLDER_MARKER = '*';
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private final Set<File> storage = new HashSet<File>(1);
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public synchronized void load(Preferences prefs, String key) {
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List<String> paths = Utils.getStringList(prefs, key);
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for (String path : paths) {
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if (path.charAt(0) == FLAT_FOLDER_MARKER) {
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storage.add(VersioningSupport.getFlat(path.substring(1)));
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storage.add(new File(path));
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public synchronized void save(Preferences prefs, String key) {
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List<String> paths = new ArrayList<String>(storage.size());
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for (File file : storage) {
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if (VersioningSupport.isFlat(file)) {
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paths.add(FLAT_FOLDER_MARKER + file.getAbsolutePath());
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paths.add(file.getAbsolutePath());
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Utils.put(prefs, key, paths);
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* A file is contained in the collection either if it is in the colelction itself or there is any of its parents.
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* @param file a file to query
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* @return true if the file is contained in the collection, false otherwise
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public synchronized boolean contains(File file) {
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for (File element : storage) {
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if (Utils.isAncestorOrEqual(element, file)) return true;
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* Adds a file to the collection. If any of its parent files is already in the collection, the file is NOT added.
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* All children of the supplied file are removed from the collection.
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* @param file a file to add
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public synchronized void add(File file) {
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for (Iterator<File> i = storage.iterator(); i.hasNext(); ) {
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File element = i.next();
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if (Utils.isAncestorOrEqual(element, file)) return;
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if (Utils.isAncestorOrEqual(file, element)) {
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* Removes a file from the collection. This method also removes all its parents and also all its children.
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* @param file a file to remove
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public synchronized void remove(File file) {
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for (Iterator<File> i = storage.iterator(); i.hasNext(); ) {
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File element = i.next();
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if (Utils.isAncestorOrEqual(element, file) || Utils.isAncestorOrEqual(file, element)) {