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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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* nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
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package org.netbeans.modules.java.source.classpath;
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import javax.swing.event.ChangeListener;
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import org.netbeans.api.java.queries.SourceForBinaryQuery;
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import org.netbeans.modules.java.source.usages.Index;
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import org.netbeans.spi.java.queries.SourceForBinaryQueryImplementation;
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import org.openide.filesystems.FileObject;
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import org.openide.filesystems.URLMapper;
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import org.openide.util.Lookup;
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* @author Tomas Zezula
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public class CacheSourceForBinaryQueryImpl implements SourceForBinaryQueryImplementation {
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private String FILE_PROTOCOL = "file"; //NOI18N
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/** Creates a new instance of CacheSourceForBinaryQueryImpl */
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public CacheSourceForBinaryQueryImpl() {
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public SourceForBinaryQuery.Result findSourceRoots(URL binaryRoot) {
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if (!FILE_PROTOCOL.equals (binaryRoot.getProtocol())) {
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URL sourceURL = Index.getSourceRootForClassFolder(binaryRoot);
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SourceForBinaryQuery.Result result = null;
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if (sourceURL != null) {
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for ( SourceForBinaryQueryImplementation impl :Lookup.getDefault().lookupAll(SourceForBinaryQueryImplementation.class)) {
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result = impl.findSourceRoots(sourceURL);
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result = new R (sourceURL);
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private static class R implements SourceForBinaryQuery.Result {
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private final FileObject sourceRoot;
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public R (final URL sourceRootURL) {
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assert sourceRootURL != null;
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this.sourceRoot = URLMapper.findFileObject(sourceRootURL);
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public void removeChangeListener(ChangeListener l) {
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//Imutable, not needed
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public void addChangeListener(ChangeListener l) {
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//Imutable, not needed
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public FileObject[] getRoots() {
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if (this.sourceRoot == null) {
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return new FileObject[0];
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return new FileObject[] {this.sourceRoot};