/*
    * 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.workbench.internal.jcr.parts;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.argeo.eclipse.ui.EclipseUiException;
  import org.eclipse.jface.resource.ImageDescriptor;
  import org.eclipse.ui.IEditorInput;
  import org.eclipse.ui.IPersistableElement;
  
  /** Editor input for {@link Node} editors */
  public class GenericNodeEditorInput implements IEditorInput {
  	private final Node currentNode;
  
  	// Caches key properties at creation time to avoid Exception at recovering
  	// time when the session has been closed
  	private String path;
  	private String uid;
  	private String name;
  
  	public GenericNodeEditorInput(Node currentNode) {
  		this.currentNode = currentNode;
  		try {
  			name = currentNode.getName();
  			uid = currentNode.getIdentifier();
  			path = currentNode.getPath();
  		} catch (RepositoryException re) {
  			throw new EclipseUiException("Cannot cache the key properties for " + currentNode, re);
  		}
  	}
  
  	public Node getCurrentNode() {
  		return currentNode;
  	}
  
  	@SuppressWarnings("unchecked")
  	public Object getAdapter(@SuppressWarnings("rawtypes") Class adapter) {
  		return null;
  	}
  
  	public boolean exists() {
  		return true;
  	}
  
  	public ImageDescriptor getImageDescriptor() {
  		return null;
  	}
  
  	public String getName() {
  		return name;
  	}
  
  	public String getUid() {
  		return uid;
  	}
  
  	public String getToolTipText() {
  		return path;
  	}
  
  	public String getPath() {
  		return path;
  	}
  
  	public IPersistableElement getPersistable() {
  		return null;
  	}
  
  	/**
  	 * Equals method based on UID that is unique within a workspace and path of
  	 * the node, thus 2 shared node that have same UID as defined in the spec
  	 * but 2 different paths will open two distinct editors.
  	 * 
  	 * TODO enhance this method to support multi repository and multi workspace
  	 * environments
  	 */
  	public boolean equals(Object obj) {
  		if (this == obj)
  			return true;
  		if (obj == null)
  			return false;
  		if (getClass() != obj.getClass())
  			return false;
  
 		GenericNodeEditorInput other = (GenericNodeEditorInput) obj;
 		if (!getUid().equals(other.getUid()))
 			return false;
 		if (!getPath().equals(other.getPath()))
 			return false;
 		return true;
 	}
 }