update/org.eclipse.update.core/src/org/eclipse/update/internal/core/SiteURLFactory.java

package org.eclipse.update.internal.core;
/*
 * (c) Copyright IBM Corp. 2000, 2002.
 * All Rights Reserved.
 */
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;

import org.eclipse.core.runtime.*;
import org.eclipse.update.core.*;
import org.eclipse.update.core.model.InvalidSiteTypeException;
import org.eclipse.update.core.model.SiteModelFactory;
import org.xml.sax.SAXException;
import org.eclipse.update.internal.core.Policy;

public class SiteURLFactory extends BaseSiteFactory {

	/*
	 * @see ISiteFactory#createSite(URL, boolean)
	 * 
	 * the URL can be of the following form
	 * 1 protocol://...../
	 * 2 protocol://.....
	 * 3 protocol://..../site.xml
	 * 
	 * 1 If the file of the file of teh url ends with '/', attempt to open the stream.
	 * if it fails, add site.xml and attempt to open the stream
	 * 
	 * 2 attempt to open the stream
	 * 	fail
	 * 		add '/site.xml' and attempt to open the stream
	 * 	sucess
	 * 		attempt to parse, if it fails, add '/site.xml' and attempt to open teh stream
	 * 
	 * 3 open the stream	 
	 */
	public ISite createSite(URL url)
		throws CoreException, InvalidSiteTypeException {
		Site site = null;
		InputStream siteStream = null;

		try {
			SiteURLContentProvider contentProvider = new SiteURLContentProvider(url);

			URL resolvedURL = URLEncoder.encode(url);
			siteStream = resolvedURL.openStream();

			SiteModelFactory factory = (SiteModelFactory) this;
			site = (Site) factory.parseSite(siteStream);

			site.setSiteContentProvider(contentProvider);
			contentProvider.setSite(site);
			site.resolve(url, getResourceBundle(url));
			site.markReadOnly();
		} catch (MalformedURLException e) {
			throw Utilities.newCoreException(
				Policy.bind(
					"SiteURLFactory.UnableToCreateURL",
					url == null ? "" : url.toExternalForm()),
				e);
			//$NON-NLS-1$
		} catch (IOException e) {
			throw Utilities.newCoreException(
				Policy.bind("SiteURLFactory.UnableToAccessSiteStream",
				url == null ? "" : url.toExternalForm()),
				e);
			//$NON-NLS-1$
		} finally {
			try {
				siteStream.close();
			} catch (Exception e) {
			}
		}
		return site;
	}

	/*
	 * @see SiteModelFactory#canParseSiteType(String)
	 */
	public boolean canParseSiteType(String type) {
		return (
			super.canParseSiteType(type)
				|| SiteURLContentProvider.SITE_TYPE.equalsIgnoreCase(type));
	}

}