org.eclipse.epp.internal.mpc.ui.catalog.AbstractResourceRunnable.java Source code

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Here is the source code for org.eclipse.epp.internal.mpc.ui.catalog.AbstractResourceRunnable.java

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/*******************************************************************************
 * Copyright (c) 2010 The Eclipse Foundation 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:
 *    The Eclipse Foundation - initial API and implementation
 *******************************************************************************/
package org.eclipse.epp.internal.mpc.ui.catalog;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.concurrent.Callable;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.epp.internal.mpc.core.util.TransportFactory;
import org.eclipse.epp.internal.mpc.ui.MarketplaceClientUi;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.osgi.util.NLS;

/**
 * A runnable that downloads a resource from an URL
 * 
 * @author David Green
 */
abstract class AbstractResourceRunnable implements IRunnableWithProgress, Callable<Object> {

    protected ResourceProvider resourceProvider;

    protected String resourceUrl;

    private final IProgressMonitor cancellationMonitor;

    public AbstractResourceRunnable(IProgressMonitor cancellationMonitor, ResourceProvider resourceProvider,
            String resourceUrl) {
        this.cancellationMonitor = cancellationMonitor;
        this.resourceProvider = resourceProvider;
        this.resourceUrl = resourceUrl;
    }

    public Object call() throws Exception {
        run(new NullProgressMonitor() {
            @Override
            public boolean isCanceled() {
                return cancellationMonitor.isCanceled();
            }
        });
        return this;
    }

    public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
        try {
            URL imageUrl = new URL(resourceUrl);

            InputStream in = TransportFactory.instance().getTransport().stream(imageUrl.toURI(), monitor);
            try {
                resourceProvider.putResource(resourceUrl, in);
            } finally {
                in.close();
            }
        } catch (URISyntaxException e) {
            MarketplaceClientUi.error(NLS.bind(Messages.AbstractResourceRunnable_badUri, resourceUrl), e);
        } catch (FileNotFoundException e) {
            //MarketplaceClientUi.error(NLS.bind(Messages.AbstractResourceRunnable_resourceNotFound, resourceUrl), e);
        } catch (IOException e) {
            MarketplaceClientUi.error(e);
        } catch (CoreException e) {
            MarketplaceClientUi.error(e);
        }
        if (resourceProvider.containsResource(resourceUrl)) {
            resourceRetrieved();
        }
    }

    protected abstract void resourceRetrieved();

}