/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.argeo.cms.ui.jcr;
  
  import java.util.Set;
  import java.util.TreeSet;
  
  import javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.PropertyIterator;
  import javax.jcr.RepositoryException;
  
  import org.argeo.eclipse.ui.EclipseUiException;
  import org.argeo.eclipse.ui.jcr.util.JcrItemsComparator;
  import org.eclipse.jface.viewers.IStructuredContentProvider;
  import org.eclipse.jface.viewers.Viewer;
  
  /** Simple content provider that displays all properties of a given Node */
  public class PropertiesContentProvider implements IStructuredContentProvider {
  	private static final long serialVersionUID = 5227554668841613078L;
  	private JcrItemsComparator itemComparator = new JcrItemsComparator();
  
  	public void dispose() {
  	}
  
  	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
  	}
  
  	public Object[] getElements(Object inputElement) {
  		try {
  			if (inputElement instanceof Node) {
  				Set<Property> props = new TreeSet<Property>(itemComparator);
  				PropertyIterator pit = ((Node) inputElement).getProperties();
  				while (pit.hasNext())
  					props.add(pit.nextProperty());
  				return props.toArray();
  			}
  			return new Object[] {};
  		} catch (RepositoryException e) {
  			throw new EclipseUiException("Cannot get element for "
  					+ inputElement, e);
  		}
  	}
  }