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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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* 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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* particular file as subject to the "Classpath" exception as provided
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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 1997-2006 Sun
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package org.netbeans.modules.java.j2seproject;
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import java.beans.PropertyChangeListener;
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import java.beans.PropertyChangeEvent;
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import javax.swing.event.ChangeEvent;
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import javax.swing.event.ChangeListener;
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import org.netbeans.modules.java.j2seproject.ui.customizer.J2SEProjectProperties;
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import org.openide.util.Mutex;
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import org.netbeans.api.project.Sources;
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import org.netbeans.api.project.SourceGroup;
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import org.netbeans.api.project.ProjectManager;
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import org.netbeans.api.project.FileOwnerQuery;
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import org.netbeans.api.java.project.JavaProjectConstants;
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import org.netbeans.spi.project.support.ant.SourcesHelper;
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import org.netbeans.spi.project.support.ant.AntProjectHelper;
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import org.netbeans.spi.project.support.ant.PropertyEvaluator;
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import org.openide.util.ChangeSupport;
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* Implementation of {@link Sources} interface for J2SEProject.
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public class J2SESources implements Sources, PropertyChangeListener, ChangeListener {
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private static final String BUILD_DIR_PROP = "${" + J2SEProjectProperties.BUILD_DIR + "}"; //NOI18N
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private static final String DIST_DIR_PROP = "${" + J2SEProjectProperties.DIST_DIR + "}"; //NOI18N
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private final AntProjectHelper helper;
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private final PropertyEvaluator evaluator;
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private final SourceRoots sourceRoots;
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private final SourceRoots testRoots;
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private SourcesHelper sourcesHelper;
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private Sources delegate;
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* Flag to forbid multiple invocation of {@link SourcesHelper#registerExternalRoots}
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private boolean externalRootsRegistered;
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private final ChangeSupport changeSupport = new ChangeSupport(this);
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J2SESources(AntProjectHelper helper, PropertyEvaluator evaluator,
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SourceRoots sourceRoots, SourceRoots testRoots) {
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this.evaluator = evaluator;
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this.sourceRoots = sourceRoots;
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this.testRoots = testRoots;
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this.sourceRoots.addPropertyChangeListener(this);
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this.testRoots.addPropertyChangeListener(this);
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this.evaluator.addPropertyChangeListener(this);
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initSources(); // have to register external build roots eagerly
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* Returns an array of SourceGroup of given type. It delegates to {@link SourcesHelper}.
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* This method firstly acquire the {@link ProjectManager#mutex} in read mode then it enters
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* into the synchronized block to ensure that just one instance of the {@link SourcesHelper}
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* is created. These instance is cleared also in the synchronized block by the
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* {@link J2SESources#fireChange} method.
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public SourceGroup[] getSourceGroups(final String type) {
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return ProjectManager.mutex().readAccess(new Mutex.Action<SourceGroup[]>() {
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public SourceGroup[] run() {
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synchronized (J2SESources.this) {
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if (delegate == null) {
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delegate = initSources();
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delegate.addChangeListener(J2SESources.this);
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_delegate = delegate;
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return _delegate.getSourceGroups(type);
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private Sources initSources() {
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this.sourcesHelper = new SourcesHelper(helper, evaluator); //Safe to pass APH
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register(sourceRoots);
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this.sourcesHelper.addNonSourceRoot (BUILD_DIR_PROP);
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this.sourcesHelper.addNonSourceRoot(DIST_DIR_PROP);
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externalRootsRegistered = false;
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ProjectManager.mutex().postWriteRequest(new Runnable() {
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if (!externalRootsRegistered) {
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sourcesHelper.registerExternalRoots(FileOwnerQuery.EXTERNAL_ALGORITHM_TRANSIENT);
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externalRootsRegistered = true;
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return this.sourcesHelper.createSources();
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private void register(SourceRoots roots) {
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String[] propNames = roots.getRootProperties();
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String[] rootNames = roots.getRootNames();
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for (int i = 0; i < propNames.length; i++) {
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String prop = propNames[i];
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String displayName = roots.getRootDisplayName(rootNames[i], prop);
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String loc = "${" + prop + "}"; // NOI18N
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String includes = "${" + J2SEProjectProperties.INCLUDES + "}"; // NOI18N
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String excludes = "${" + J2SEProjectProperties.EXCLUDES + "}"; // NOI18N
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sourcesHelper.addPrincipalSourceRoot(loc, includes, excludes, displayName, null, null); // NOI18N
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sourcesHelper.addTypedSourceRoot(loc, includes, excludes, JavaProjectConstants.SOURCES_TYPE_JAVA, displayName, null, null); // NOI18N
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public void addChangeListener(ChangeListener changeListener) {
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changeSupport.addChangeListener(changeListener);
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public void removeChangeListener(ChangeListener changeListener) {
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changeSupport.removeChangeListener(changeListener);
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private void fireChange() {
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synchronized (this) {
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if (delegate != null) {
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delegate.removeChangeListener(this);
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changeSupport.fireChange();
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public void propertyChange(PropertyChangeEvent evt) {
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String propName = evt.getPropertyName();
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if (SourceRoots.PROP_ROOT_PROPERTIES.equals(propName) ||
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J2SEProjectProperties.BUILD_DIR.equals(propName) ||
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J2SEProjectProperties.DIST_DIR.equals(propName)) {
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public void stateChanged (ChangeEvent event) {