PentahoVersionCheckHelper.java

/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program 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.
 *
 * Copyright 2007 - 2009 Pentaho Corporation.  All rights reserved.
 *
 *
 * @created Sep 17, 2007 
 * @author Will Gorman
 */
package org.pentaho.platform.plugin.services.versionchecker;

import java.util.ArrayList;

import org.pentaho.platform.engine.core.system.PentahoSystem;
import org.pentaho.versionchecker.IVersionCheckDataProvider;
import org.pentaho.versionchecker.IVersionCheckErrorHandler;
import org.pentaho.versionchecker.IVersionCheckResultHandler;
import org.pentaho.versionchecker.VersionChecker;

/**
 * Avoid loading this class without reflection, so if someone
 * deletes the versionchecker.jar, there will be no class loading
 * exceptions
 *
 * @author Will Gorman
 *
 */
public class PentahoVersionCheckHelper {

  protected boolean ignoreExistingUpdates = false;

  protected ArrayList resultList = new ArrayList();

  protected int versionRequestFlags = -1;

  public void setVersionRequestFlags(final int versionRequestFlags) {
    this.versionRequestFlags = versionRequestFlags;
  }

  public void setIgnoreExistingUpdates(final boolean ignoreExistingUpdates) {
    this.ignoreExistingUpdates = ignoreExistingUpdates;
  }

  public ArrayList getResults() {
    return resultList;
  }

  public void performUpdate() {
    IVersionCheckResultHandler resultHandler = new IVersionCheckResultHandler() {
      public void processResults(String results) {
        // parse xml results vs spewing out xml?
        resultList.add(results);
      }
    };

    IVersionCheckErrorHandler errorHandler = new IVersionCheckErrorHandler() {
      public void handleException(Exception e) {
        resultList.add("<vercheck><error><![CDATA[" + e.getMessage() + "]]></error></vercheck>"); //$NON-NLS-1$ //$NON-NLS-2$
      }
    };

//    PentahoVersionCheckDataProvider dataProvider = new PentahoVersionCheckDataProvider();
    IVersionCheckDataProvider dataProvider = PentahoSystem.get(IVersionCheckDataProvider.class, "IVersionCheckDataProvider", null); //$NON-NLS-1$
    if (dataProvider == null) {
      dataProvider = new PentahoVersionCheckDataProvider();
    }
      
    if (versionRequestFlags != -1) {
      dataProvider.setVersionRequestFlags(versionRequestFlags);
    }

    VersionChecker vc = new VersionChecker();

    vc.setDataProvider(dataProvider);
    vc.addResultHandler(resultHandler);
    vc.addErrorHandler(errorHandler);

    vc.performCheck(ignoreExistingUpdates);
  }
}