001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041:
042: package org.netbeans.modules.tasklist.impl;
043:
044: import java.beans.PropertyChangeListener;
045: import java.beans.PropertyChangeSupport;
046: import java.util.ArrayList;
047: import java.util.List;
048: import org.netbeans.spi.tasklist.TaskScanningScope;
049: import org.openide.util.Lookup;
050: import org.openide.util.LookupEvent;
051: import org.openide.util.LookupListener;
052: import org.openide.util.lookup.Lookups;
053:
054: /**
055: *
056: * @author S. Aubrecht
057: */
058: public final class ScanningScopeList {
059:
060: public static final String PROP_SCOPE_LIST = "scopeList"; //NOI18N
061:
062: private static final String SCOPE_LIST_PATH = "TaskList/ScanningScopes"; //NOI18N
063:
064: private static ScanningScopeList theInstance;
065:
066: private PropertyChangeSupport propertySupport = new PropertyChangeSupport(
067: this );
068:
069: private Lookup.Result<TaskScanningScope> lookupRes;
070:
071: /** Creates a new instance of ScanningScopeList */
072: private ScanningScopeList() {
073: }
074:
075: public static ScanningScopeList getDefault() {
076: if (null == theInstance) {
077: theInstance = new ScanningScopeList();
078: }
079: return theInstance;
080: }
081:
082: public void addPropertyChangeListener(PropertyChangeListener pcl) {
083: propertySupport.addPropertyChangeListener(pcl);
084: }
085:
086: public void removePropertyChangeListener(PropertyChangeListener pcl) {
087: propertySupport.removePropertyChangeListener(pcl);
088: }
089:
090: public List<TaskScanningScope> getTaskScanningScopes() {
091: if (null == lookupRes) {
092: lookupRes = initLookup();
093: lookupRes.addLookupListener(new LookupListener() {
094: public void resultChanged(LookupEvent ev) {
095: fireScopeListChange();
096: }
097: });
098: }
099: return new ArrayList<TaskScanningScope>(lookupRes
100: .allInstances());
101: }
102:
103: public TaskScanningScope getDefaultScope() {
104: List<TaskScanningScope> scopes = getTaskScanningScopes();
105: for (TaskScanningScope ss : scopes) {
106: if (Accessor.isDefault(ss)) {
107: return ss;
108: }
109: }
110: return scopes.isEmpty() ? null : scopes.get(0);
111: }
112:
113: private Lookup.Result<TaskScanningScope> initLookup() {
114: Lookup lkp = Lookups.forPath(SCOPE_LIST_PATH);
115: Lookup.Template<TaskScanningScope> template = new Lookup.Template<TaskScanningScope>(
116: TaskScanningScope.class);
117: Lookup.Result<TaskScanningScope> res = lkp.lookup(template);
118: return res;
119: }
120:
121: private void fireScopeListChange() {
122: propertySupport.firePropertyChange(PROP_SCOPE_LIST, null,
123: getTaskScanningScopes());
124: }
125: }
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