GeographyImplClient.java :  » ERP-CRM-Financial » JFire-1.0.1 » org » nightlabs » jfire » geography » ui » Java Open Source

package org.nightlabs.jfire.geography.ui;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.zip.InflaterInputStream;

import org.eclipse.core.runtime.ListenerList;
import org.nightlabs.jfire.base.JFireEjb3Factory;
import org.nightlabs.jfire.base.jdo.notification.JDOLifecycleEvent;
import org.nightlabs.jfire.base.jdo.notification.JDOLifecycleListener;
import org.nightlabs.jfire.base.jdo.notification.JDOLifecycleManager;
import org.nightlabs.jfire.base.ui.jdo.notification.JDOLifecycleAdapterJob;
import org.nightlabs.jfire.base.ui.login.Login;
import org.nightlabs.jfire.geography.CSV;
import org.nightlabs.jfire.geography.Geography;
import org.nightlabs.jfire.geography.GeographyImplResourceCSV;
import org.nightlabs.jfire.geography.GeographyManagerRemote;
import org.nightlabs.jfire.geography.ui.resource.Messages;
import org.nightlabs.jfire.jdo.notification.IJDOLifecycleListenerFilter;
import org.nightlabs.jfire.jdo.notification.JDOLifecycleState;
import org.nightlabs.jfire.jdo.notification.SimpleLifecycleListenerFilter;
import org.nightlabs.jfire.security.SecurityReflector;

public class GeographyImplClient
extends GeographyImplResourceCSV
{
  private ListenerList geoChangeListeners = new ListenerList();

  public GeographyImplClient()
  {
    JDOLifecycleManager.sharedInstance().addLifecycleListener(myLifecycleListener);
  }

  /**
   * This method sets the system property {@link Geography#PROPERTY_KEY_GEOGRAPHY_CLASS}
   * to the fully qualified class name of <code>GeographyImplResourceCSV</code>. This method
   * does not create a shared instance!
   */
  public static void register()
  {
    System.setProperty(PROPERTY_KEY_GEOGRAPHY_CLASS, GeographyImplClient.class.getName());
  }

  /**
   * This method creates a new instance of <code>GeographyImplResourceCSV</code> and sets it
   * as shared instance. Therefore, a subsequent call to {@link Geography#sharedInstance()} will
   * return this instance (if it is not overridden by other code). Note, that there is one
   * shared instance per organisation. The organisationID is determined by {@link SecurityReflector}.
   */
  public static void createSharedInstance()
  {
    register();
    setSharedInstance(new GeographyImplClient());
  }

  public static InputStream createCSVInputStream(final String csvType, String countryID)
  {
    try {
      GeographyManagerRemote gm = JFireEjb3Factory.getRemoteBean(GeographyManagerRemote.class,
        Login.getLogin().getInitialContextProperties());
      byte[] data = gm.getCSVData(csvType, countryID);
      if (data == null)
        return null;

      return new InflaterInputStream(new ByteArrayInputStream(data));
    } catch (Exception x) {
      throw new RuntimeException(x);
    }
  }

  @Override
  protected InputStream createCountryCSVInputStream()
  {
    return createCSVInputStream(CSV.CSV_TYPE_COUNTRY, ""); //$NON-NLS-1$
  }

  @Override
  protected InputStream createRegionCSVInputStream(String countryID)
  {
    return createCSVInputStream(CSV.CSV_TYPE_REGION, countryID);
  }

  @Override
  protected InputStream createCityCSVInputStream(String countryID)
  {
    return createCSVInputStream(CSV.CSV_TYPE_CITY, countryID);
  }

  @Override
  protected InputStream createZipCSVInputStream(String countryID)
  {
    return createCSVInputStream(CSV.CSV_TYPE_ZIP, countryID);
  }

  @Override
  protected InputStream createDistrictCSVInputStream(String countryID)
  {
    return createCSVInputStream(CSV.CSV_TYPE_DISTRICT, countryID);
  }

  @Override
  protected InputStream createLocationCSVInputStream(String countryID)
  {
    return createCSVInputStream(CSV.CSV_TYPE_LOCATION, countryID);
  }

  public void addGeographyTemplateDataChangedListener(GeographyTemplateDataChangedListener listener) {
    synchronized(geoChangeListeners) {
      geoChangeListeners.add(listener);
    }
  }

  public void removeGeographyTemplateDataChangedListener(GeographyTemplateDataChangedListener listener) {
    synchronized(geoChangeListeners) {
      geoChangeListeners.remove(listener);
    }
  }

  private void notifyChangeListeners(JDOLifecycleEvent event) {
    Object[] listeners;
    synchronized(geoChangeListeners) {
      listeners = geoChangeListeners.getListeners();
    }

    for (Object listener : listeners)
      ((GeographyTemplateDataChangedListener)listener).geographyTemplateDataChanged(event);
  }

  private JDOLifecycleListener myLifecycleListener = new JDOLifecycleAdapterJob(Messages.getString("org.nightlabs.jfire.geography.ui.GeographyImplClient.loadingCSVJob")) { //$NON-NLS-1$
    private IJDOLifecycleListenerFilter filter = new SimpleLifecycleListenerFilter(
        CSV.class,
        true,
        new JDOLifecycleState[]{JDOLifecycleState.DIRTY, JDOLifecycleState.NEW});

    public IJDOLifecycleListenerFilter getJDOLifecycleListenerFilter()
    {
      return filter;
    }

    public void notify(JDOLifecycleEvent event)
    {
      clearCache(); // TODO improve this - should only clear those parts of the cache that really become invalid
      notifyChangeListeners(event);
    }
  };
}