descent.internal.ui.actions.WorkbenchRunnableAdapter.java Source code

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Here is the source code for descent.internal.ui.actions.WorkbenchRunnableAdapter.java

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/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package descent.internal.ui.actions;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.core.runtime.jobs.Job;

import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.operation.IThreadListener;

import descent.core.JavaCore;

import descent.internal.ui.JavaUIStatus;

/**
 * An <code>IRunnableWithProgress</code> that adapts and  <code>IWorkspaceRunnable</code>
 * so that is can be executed inside <code>IRunnableContext</code>. <code>OperationCanceledException</code> 
 * thrown by the adapted runnable are caught and re-thrown as a <code>InterruptedException</code>.
 */
public class WorkbenchRunnableAdapter implements IRunnableWithProgress, IThreadListener {

    private boolean fTransfer = false;
    private IWorkspaceRunnable fWorkspaceRunnable;
    private ISchedulingRule fRule;

    /**
     * Runs a workspace runnable with the workspace lock.
     */
    public WorkbenchRunnableAdapter(IWorkspaceRunnable runnable) {
        this(runnable, ResourcesPlugin.getWorkspace().getRoot());
    }

    /**
     * Runs a workspace runnable with the given lock or <code>null</code> to run with no lock at all.
     */
    public WorkbenchRunnableAdapter(IWorkspaceRunnable runnable, ISchedulingRule rule) {
        fWorkspaceRunnable = runnable;
        fRule = rule;
    }

    /**
     * Runs a workspace runnable with the given lock or <code>null</code> to run with no lock at all.
     * @param transfer <code>true</code> if the rule is to be transfered 
     *  to the model context thread. Otherwise <code>false</code>
     */
    public WorkbenchRunnableAdapter(IWorkspaceRunnable runnable, ISchedulingRule rule, boolean transfer) {
        fWorkspaceRunnable = runnable;
        fRule = rule;
        fTransfer = transfer;
    }

    public ISchedulingRule getSchedulingRule() {
        return fRule;
    }

    /**
     * {@inheritDoc}
     */
    public void threadChange(Thread thread) {
        if (fTransfer)
            Platform.getJobManager().transferRule(fRule, thread);
    }

    /*
     * @see IRunnableWithProgress#run(IProgressMonitor)
     */
    public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
        try {
            JavaCore.run(fWorkspaceRunnable, fRule, monitor);
        } catch (OperationCanceledException e) {
            throw new InterruptedException(e.getMessage());
        } catch (CoreException e) {
            throw new InvocationTargetException(e);
        }
    }

    public void runAsUserJob(String name, final Object jobFamiliy) {
        Job buildJob = new Job(name) {
            /* (non-Javadoc)
             * @see org.eclipse.core.runtime.jobs.Job#run(org.eclipse.core.runtime.IProgressMonitor)
             */
            protected IStatus run(IProgressMonitor monitor) {
                try {
                    WorkbenchRunnableAdapter.this.run(monitor);
                } catch (InvocationTargetException e) {
                    Throwable cause = e.getCause();
                    if (cause instanceof CoreException) {
                        return ((CoreException) cause).getStatus();
                    } else {
                        return JavaUIStatus.createError(IStatus.ERROR, cause);
                    }
                } catch (InterruptedException e) {
                    return Status.CANCEL_STATUS;
                } finally {
                    monitor.done();
                }
                return Status.OK_STATUS;
            }

            public boolean belongsTo(Object family) {
                return jobFamiliy == family;
            }
        };
        buildJob.setRule(fRule);
        buildJob.setUser(true);
        buildJob.schedule();

        // TODO: should block until user pressed 'to background'
    }
}