org.eclipse.plugin.worldwind.operation.WMSParseOperation.java Source code

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Here is the source code for org.eclipse.plugin.worldwind.operation.WMSParseOperation.java

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/*******************************************************************************
 * Copyright (c) 2006 Vladimir Silva 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:
 *     Vladimir Silva - initial API and implementation
 *******************************************************************************/
package org.eclipse.plugin.worldwind.operation;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.lang.reflect.InvocationTargetException;
import java.net.URL;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.widgets.Display;

import org.eclipse.plugin.worldwind.contrib.parsers.SimpleHTTPClient;
import org.eclipse.plugin.worldwind.contrib.parsers.SimpleWMSParser;
import org.eclipse.plugin.worldwind.contrib.parsers.WMS_Capabilities;

/**
 * WMS Parse JFace Operation
 * @author Owner
 *
 */
public class WMSParseOperation implements IRunnableWithProgress {
    // Unknown progress size?
    private URL url;
    private String serverName;
    private TableViewer viewer;
    private Display display;

    private WMS_Capabilities capabilities;

    //  Total # of parsed layers
    private int totalParsed;

    public WMSParseOperation(String serverName, URL url, TableViewer viewer, Display display) {
        this.url = url;
        this.serverName = serverName;
        this.viewer = viewer;
        this.display = display;
    }

    public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
        // Load remote WMS XML from url
        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        try {
            monitor.beginTask(serverName, IProgressMonitor.UNKNOWN);

            // Long operation: load XML via HTTP
            SimpleHTTPClient client = new SimpleHTTPClient(url);
            client.doGet(bos);
            bos.close();

            // parse WMS XML
            SimpleWMSParser parser = new SimpleWMSParser();
            parser.parse(serverName, new ByteArrayInputStream(bos.toString().getBytes()));

            capabilities = parser.getCapabilities();
            totalParsed = parser.getParsedCount();

            display.syncExec(new Runnable() {
                public void run() {
                    // remove any prev elements
                    viewer.getTable().removeAll();

                    // Ad layers to the list box
                    for (WMS_Capabilities.Layer layer : capabilities.getLayers()) {
                        viewer.add(layer.Title);
                    }
                }
            });

        } catch (Exception e) {
            //e.printStackTrace();
            monitor.done();

            throw new InterruptedException(e.getClass().getName() + ": " + e.getMessage());
        }

        // done
        monitor.done();

        if (monitor.isCanceled())
            throw new InterruptedException("WMS parse operation cancelled.");

    }

    public WMS_Capabilities getCapabilities() {
        return capabilities;
    }

    public int getParsedCount() {
        return totalParsed;
    }
}