SiteURLFactory.java :  » IDE-Eclipse » update » org » eclipse » update » internal » core » Java Open Source

/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.update.internal.core;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Date;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.osgi.util.NLS;
import org.eclipse.update.core.BaseSiteFactory;
import org.eclipse.update.core.ISite;
import org.eclipse.update.core.ISiteFactoryExtension;
import org.eclipse.update.core.Site;
import org.eclipse.update.core.SiteFeatureReferenceModel;
import org.eclipse.update.core.Utilities;
import org.eclipse.update.core.model.InvalidSiteTypeException;
import org.eclipse.update.core.model.SiteModelFactory;
import org.eclipse.update.internal.core.connection.ConnectionFactory;
import org.eclipse.update.internal.core.connection.IResponse;
import org.eclipse.update.internal.model.SiteWithTimestamp;

/**
 * An update site factory.
 *
 */
public class SiteURLFactory extends BaseSiteFactory implements ISiteFactoryExtension {
  
  /*
   * For backward compatibility.
   */
  public ISite createSite(URL url) throws CoreException, InvalidSiteTypeException {
    return createSite(url, null);
  }
  /*
   * @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, IProgressMonitor monitor) throws CoreException, InvalidSiteTypeException {
    Site site = null;
    InputStream siteStream = null;
  
    try {
      SiteURLContentProvider contentProvider = new SiteURLContentProvider(url);
  
      URL resolvedURL = URLEncoder.encode(url);
      IResponse response = ConnectionFactory.get(resolvedURL);
      UpdateManagerUtils.checkConnectionResult(response, resolvedURL);
      siteStream = response.getInputStream(monitor);
      // the stream can be null if the user cancels the connection
      if (siteStream==null) return null;

      SiteModelFactory factory = this;
      site = (Site) factory.parseSite(siteStream);
      //System.out.println(site.getClass().getCanonicalName());
      site.setSiteContentProvider(contentProvider);
      contentProvider.setSite(site);
      site.resolve(url, url);
      site.markReadOnly();
      /*SiteWithTimestamp siteWithTimestamp = new SiteWithTimestamp(site);
      siteWithTimestamp.setTimestamp( new Date(response.getLastModified()));
      site = siteWithTimestamp;*/
      ((SiteWithTimestamp)site).setTimestamp( new Date(response.getLastModified()));
    } catch (MalformedURLException e) {
      throw Utilities.newCoreException(NLS.bind(Messages.SiteURLFactory_UnableToCreateURL, (new String[] { url == null ? "" : url.toExternalForm() })), e); //$NON-NLS-1$
    } catch (IOException e) {
      throw Utilities.newCoreException(NLS.bind(Messages.SiteURLFactory_UnableToAccessSiteStream, (new String[] { url == null ? "" : url.toExternalForm() })), ISite.SITE_ACCESS_EXCEPTION, e);  //$NON-NLS-1$
    } finally {
      if (siteStream != null) {
        try {
          siteStream.close();
        } catch (IOException e) {
        }
      }
    }
    return site;
  }

  /*
   * @see SiteModelFactory#canParseSiteType(String)
   */
  public boolean canParseSiteType(String type) {
    return (super.canParseSiteType(type) || SiteURLContentProvider.SITE_TYPE.equalsIgnoreCase(type));
  }
    /* (non-Javadoc)
     * @see org.eclipse.update.core.BaseSiteFactory#createFeatureReferenceModel()
     */
    public SiteFeatureReferenceModel createFeatureReferenceModel() {
        return new UpdateSiteFeatureReference();
    }

}