org.polymap.core.style.StylePlugin.java Source code

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Here is the source code for org.polymap.core.style.StylePlugin.java

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/* 
 * polymap.org
 * Copyright 2009-2012, Polymap GmbH. All rights reserved.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 */
package org.polymap.core.style;

import java.util.HashMap;

import net.refractions.udig.catalog.ID;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleEvent;
import org.osgi.framework.BundleListener;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
import org.osgi.service.http.HttpService;

import org.eclipse.ui.plugin.AbstractUIPlugin;

import org.eclipse.core.runtime.IPath;

import org.polymap.core.runtime.Polymap;
import org.polymap.core.style.geotools.GtLocalCatalog;

/**
 * 
 *
 * @author <a href="http://www.polymap.de">Falko Braeutigam</a>
 * @since 3.0
 */
public class StylePlugin extends AbstractUIPlugin {

    private static Log log = LogFactory.getLog(StylePlugin.class);

    public static final String PLUGIN_ID = "org.polymap.core.style";

    private static StylePlugin plugin;

    /** The style catalog that holds all styles of this instance. */
    private static IStyleCatalog localCatalog;

    private static boolean started = false;

    private HashMap<String, ID> servlet_path_mapping;

    private final static String sld_servlet_path = "/sld";

    public StylePlugin() {
        servlet_path_mapping = new HashMap<String, ID>();
    }

    public void start(final BundleContext context) throws Exception {
        super.start(context);
        plugin = this;

        IPath ws = Polymap.getWorkspacePath();
        log.info("Starting StyleCatalog Plugin. Workspace: " + ws);
        localCatalog = new GtLocalCatalog(ws);

        // start HttpServiceRegistry
        context.addBundleListener(new BundleListener() {

            public void bundleChanged(BundleEvent ev) {

                if (!started && (HttpService.class != null)) {

                    // log.info("bundle event" + ev.getType() + " " +
                    // ev.getBundle() );
                    // if (ev.getType() == BundleEvent.STARTED &&
                    // ev.getBundle().equals( getBundle() )) {

                    HttpService httpService;
                    // BundleContext context=
                    // CorePlugin.getDefault().getBundle().getBundleContext();
                    ServiceReference[] httpReferences = null;
                    try {
                        httpReferences = context.getServiceReferences(HttpService.class.getName(), null);
                    } catch (InvalidSyntaxException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    if (httpReferences != null) {
                        String port = context.getProperty("org.osgi.service.http.port");
                        String hostname = context.getProperty("org.osgi.service.http.hostname");

                        log.info("found http service on hostname:" + hostname + "/ port:" + port);

                        httpService = (HttpService) context.getService(httpReferences[0]);

                        try {
                            SLDDownloadServlet s = new SLDDownloadServlet();

                            httpService.registerServlet(sld_servlet_path, s, null, null);
                            started = true;
                        } catch (Exception e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    } else {
                        log.debug("No http service yet available - waiting for next BundleEvent");
                    }
                }
                // stop
                else if (ev.getType() == BundleEvent.STOPPED && ev.getBundle().equals(getBundle())) {

                }
            }
        });
    }

    public String getServletPathForId(ID id) {
        servlet_path_mapping.put(id.labelResource(), id);
        return StringUtils.removeStart(sld_servlet_path, "/") + "/" + id.labelResource();
    }

    public ID getIDbyServletPath(String path) {
        return servlet_path_mapping.get(path);
    }

    public void stop(BundleContext context) throws Exception {
        plugin = null;
        super.stop(context);
    }

    public static StylePlugin getDefault() {
        return plugin;
    }

    /** 
     * The style catalog that holds all styles of this instance. 
     */
    public static IStyleCatalog getStyleCatalog() {
        return localCatalog;
    }

}