org.eclipse.mylyn.internal.tasks.ui.TaskListModifyOperation.java Source code

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Here is the source code for org.eclipse.mylyn.internal.tasks.ui.TaskListModifyOperation.java

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/*******************************************************************************
 * Copyright (c) 2004, 2008 Tasktop Technologies and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Tasktop Technologies - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.internal.tasks.ui;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.mylyn.internal.tasks.core.ITaskListRunnable;
import org.eclipse.mylyn.internal.tasks.core.TaskList;

/**
 * Use to perform atomic operations on the task list i.e. open/restore
 * 
 * @author Rob Elves
 * @since 3.0
 */
public abstract class TaskListModifyOperation implements IRunnableWithProgress {

    ISchedulingRule rule;

    public TaskListModifyOperation() {
        this(null);
    }

    public TaskListModifyOperation(ISchedulingRule rule) {
        this.rule = rule;
    }

    protected abstract void operations(IProgressMonitor monitor)
            throws CoreException, InvocationTargetException, InterruptedException;

    final public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
        final InvocationTargetException[] ite = new InvocationTargetException[1];
        try {
            ITaskListRunnable runnable = new ITaskListRunnable() {

                public void execute(IProgressMonitor monitor) throws CoreException {
                    try {
                        Job.getJobManager().beginRule(rule,
                                new SubProgressMonitor(monitor, IProgressMonitor.UNKNOWN));
                        operations(monitor);
                    } catch (InvocationTargetException e) {
                        ite[0] = e;
                    } catch (InterruptedException e) {
                        throw new OperationCanceledException(e.getMessage());
                    } finally {
                        Job.getJobManager().endRule(rule);
                    }
                }
            };
            getTaskList().run(runnable, monitor);
        } catch (CoreException e) {
            throw new InvocationTargetException(e);
        }

        if (ite[0] != null) {
            throw ite[0];
        }
    }

    protected TaskList getTaskList() {
        return TasksUiPlugin.getTaskList();
    }
}