gov.redhawk.sca.internal.ui.handlers.RefreshHandler.java Source code

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Here is the source code for gov.redhawk.sca.internal.ui.handlers.RefreshHandler.java

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/** 
 * This file is protected by Copyright. 
 * Please refer to the COPYRIGHT file distributed with this source distribution.
 * 
 * This file is part of REDHAWK IDE.
 * 
 * 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.
 *
 */
package gov.redhawk.sca.internal.ui.handlers;

import gov.redhawk.model.sca.IRefreshable;
import gov.redhawk.model.sca.RefreshDepth;
import gov.redhawk.model.sca.provider.ScaItemProviderAdapterFactory;
import gov.redhawk.sca.util.PluginUtil;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.emf.edit.provider.IItemLabelProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.navigator.CommonNavigator;
import org.eclipse.ui.progress.WorkbenchJob;

/**
 * 
 */
public class RefreshHandler extends AbstractHandler implements IHandler {

    /**
     * {@inheritDoc}
     */
    @Override
    public Object execute(final ExecutionEvent event) throws ExecutionException {
        ISelection selection = HandlerUtil.getActiveMenuSelection(event);
        if (selection == null) {
            selection = HandlerUtil.getCurrentSelection(event);
        }
        if (selection instanceof IStructuredSelection) {
            final IStructuredSelection structuredSelection = (IStructuredSelection) selection;
            final List<IRefreshable> refreshList = new ArrayList<IRefreshable>();
            for (final Object obj : structuredSelection.toList()) {
                final IRefreshable dataObj = PluginUtil.adapt(IRefreshable.class, obj, true);
                if (dataObj != null) {
                    refreshList.add(dataObj);
                }
            }
            final int size = refreshList.size();
            if (size > 0) {
                final IProgressMonitor refreshProgressGroup = Job.getJobManager().createProgressGroup();
                final IWorkbenchPart activePart = HandlerUtil.getActivePart(event);
                refreshProgressGroup.beginTask("Refreshing elements...", size);
                final ScaItemProviderAdapterFactory adapterFactory = new ScaItemProviderAdapterFactory();
                final Display display = HandlerUtil.getActiveShell(event).getDisplay();
                for (final IRefreshable dataObj : refreshList) {
                    final IItemLabelProvider lp = (IItemLabelProvider) adapterFactory.adapt(dataObj,
                            IItemLabelProvider.class);
                    String label = "";
                    if (lp != null) {
                        label = " " + lp.getText(dataObj);
                    }
                    final Job job = new Job("Refreshing" + label) {

                        @Override
                        protected IStatus run(final IProgressMonitor monitor) {
                            try {
                                dataObj.refresh(monitor, RefreshDepth.CHILDREN);
                                final WorkbenchJob uiJob = new WorkbenchJob(display, "Refresh viewer") {

                                    @Override
                                    public IStatus runInUIThread(final IProgressMonitor monitor) {
                                        if (activePart instanceof CommonNavigator) {
                                            final CommonNavigator navigator = (CommonNavigator) activePart;
                                            navigator.getCommonViewer().refresh(structuredSelection.toArray());
                                        }
                                        refreshProgressGroup.done();
                                        return Status.OK_STATUS;
                                    }
                                };
                                uiJob.setPriority(Job.INTERACTIVE);
                                uiJob.setUser(false);
                                uiJob.schedule();
                            } catch (final InterruptedException e) {
                                return Status.CANCEL_STATUS;
                            }
                            return Status.OK_STATUS;
                        }

                        @Override
                        protected void canceling() {
                            getThread().interrupt();
                            super.canceling();
                        }
                    };
                    job.setProgressGroup(refreshProgressGroup, 1);
                    job.setUser(true);
                    job.schedule();
                }
                adapterFactory.dispose();
            }
        }
        return null;
    }

}