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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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* 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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* License Header, with the fields enclosed by brackets [] replaced by
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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 1997-2006 Sun
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package org.netbeans.spi.tasklist;
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import java.util.List;
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import org.netbeans.modules.tasklist.trampoline.TaskManager;
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import org.openide.filesystems.FileObject;
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* <p>Task Scanner that can push new Tasks into Task List window.</p>
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* <p>You should use this scanner type if it takes too long to compute your tasks
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* or if your tasks are calculated asynchronously. <br/>
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* In most cases it is easier to use {@link FileTaskScanner} instead.</p>
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public abstract class PushTaskScanner {
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private String displayName;
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private String description;
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private String optionsPath;
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* Creates a new instance of PushTaskScanner
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* @param displayName Scanner's display name, will appear in Task List's filter window.
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* @param description Scanner's description, will be used for tooltips.
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* @param optionsPath Path that identifies panel in the global Options dialog window,
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* or null if the scanner has no user settings. When scanner's settings changed the
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* scanner must refresh its tasks the Task List window
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* ({@link PushTaskScanner.Callback#clearAllTasks}, {@link PushTaskScanner.Callback#setTasks}).
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public PushTaskScanner( String displayName, String description, String optionsPath ) {
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assert null != displayName;
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this.displayName = displayName;
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this.description = description;
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this.optionsPath = optionsPath;
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* Scanner's display name.
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* @return Scanner's display name.
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final String getDisplayName() {
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* Scanner's description (e.g. for tooltips).
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* @return Scanner's description (e.g. for tooltips).
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final String getDescription() {
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* Path to the global options panel.
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* @return Path that identifies panel in the global Options dialog window,
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* or null if the scanner has no user settings.
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final String getOptionsPath() {
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* Called by the framework when the user switches to a different scanning scope
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* or when the currently used scope needs to be refreshed.
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* @param scope New scanning scope, null value indicates that task scanning is to be cancelled.
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* @param callback Callback into Task List framework.
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public abstract void setScope( TaskScanningScope scope, Callback callback );
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* Callback into Task List framework
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public static final class Callback {
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private PushTaskScanner scanner;
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private TaskManager tm;
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/** Creates a new instance of SimpleTaskScannerCallback */
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Callback( TaskManager tm, PushTaskScanner scanner ) {
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this.scanner = scanner;
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* Notify the framework that the scanner started looking for available Tasks.
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public void started() {
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tm.started( scanner );
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* Add/remove Tasks for the given file/folder.
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* @param file Resource (file or folder) the tasks are associated with.
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* @param tasks Tasks associated with the given resource or an empty list to remove previously provided Tasks.
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public void setTasks( FileObject file, List<? extends Task> tasks ) {
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tm.setTasks( scanner, file, tasks );
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* Remove from the Task List window all Tasks that were provided by this scanner.
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public void clearAllTasks() {
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tm.clearAllTasks( scanner );
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* Notify the framework that the scanner has finished.
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public void finished() {
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tm.finished( scanner );