/*****************************************************************************
 * Copyright (c) 2006, 2008 g-Eclipse Consortium 
 * 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
 *
 * Initial development of the original code was made for the
 * g-Eclipse project founded by European Union
 * project number: FP6-IST-034327  http://www.geclipse.eu/
 *
 * Contributors:
 *    Christof Klausecker GUP, JKU - initial API and implementation
 *****************************************************************************/

package eu.geclipse.traceview.views.internal;

import java.util.ArrayList;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;

/**
 * Selection provider
 */
public class SelectionProvider implements ISelectionProvider {

  ArrayList<ISelectionChangedListener> selectionChangedListeners;
  ISelection selection;

  /**
   * 
   *
   */
  public SelectionProvider() {
    this.selectionChangedListeners = new ArrayList<ISelectionChangedListener>();
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.eclipse.jface.viewers.ISelectionProvider#addSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
   */
  public void addSelectionChangedListener( final ISelectionChangedListener listener )
  {
    this.selectionChangedListeners.add( listener );
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.eclipse.jface.viewers.ISelectionProvider#removeSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
   */
  public void removeSelectionChangedListener( final ISelectionChangedListener listener )
  {
    this.selectionChangedListeners.remove( listener );
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.eclipse.jface.viewers.ISelectionProvider#setSelection(org.eclipse.jface.viewers.ISelection)
   */
  public void setSelection( final ISelection selection ) {
    this.selection = selection;
    SelectionChangedEvent selectionChangedEvent = new SelectionChangedEvent( this,
                                                                             selection );
    for( ISelectionChangedListener selectionChangedListener : this.selectionChangedListeners )
    {
      selectionChangedListener.selectionChanged( selectionChangedEvent );
    }
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.eclipse.jface.viewers.ISelectionProvider#getSelection()
   */
  public ISelection getSelection() {
    return this.selection;
  }
}