/*
    * 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 javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.PropertyType;
  import javax.jcr.RepositoryException;
  
  import org.argeo.cms.ui.jcr.model.RepositoriesElem;
  import org.argeo.cms.ui.jcr.model.RepositoryElem;
  import org.argeo.cms.ui.jcr.model.SingleJcrNodeElem;
  import org.argeo.cms.ui.jcr.model.WorkspaceElem;
  import org.argeo.eclipse.ui.EclipseUiException;
  import org.argeo.eclipse.ui.TreeParent;
  
  /** Useful methods to manage the JCR Browser */
  public class JcrBrowserUtils {
  
  	public static String getPropertyTypeAsString(Property prop) {
  		try {
  			return PropertyType.nameFromValue(prop.getType());
  		} catch (RepositoryException e) {
  			throw new EclipseUiException("Cannot check type for " + prop, e);
  		}
  	}
  
  	/** Insure that the UI component is not stale, refresh if needed */
  	public static void forceRefreshIfNeeded(TreeParent element) {
  		Node curNode = null;
  
  		boolean doRefresh = false;
  
  		try {
  			if (element instanceof SingleJcrNodeElem) {
  				curNode = ((SingleJcrNodeElem) element).getNode();
  			} else if (element instanceof WorkspaceElem) {
  				curNode = ((WorkspaceElem) element).getRootNode();
  			}
  
  			if (curNode != null && element.getChildren().length != curNode.getNodes().getSize())
  				doRefresh = true;
  			else if (element instanceof RepositoryElem) {
  				RepositoryElem rn = (RepositoryElem) element;
  				if (rn.isConnected()) {
  					String[] wkpNames = rn.getAccessibleWorkspaceNames();
  					if (element.getChildren().length != wkpNames.length)
  						doRefresh = true;
  				}
  			} else if (element instanceof RepositoriesElem) {
  				doRefresh = true;
  				// Always force refresh for RepositoriesElem : the condition
  				// below does not take remote repository into account and it is
  				// not trivial to do so.
  
  				// RepositoriesElem rn = (RepositoriesElem) element;
  				// if (element.getChildren().length !=
  				// rn.getRepositoryRegister()
  				// .getRepositories().size())
  				// doRefresh = true;
  			}
  			if (doRefresh) {
  				element.clearChildren();
  				element.getChildren();
  			}
  		} catch (RepositoryException re) {
  			throw new EclipseUiException("Unexpected error while synchronising the UI with the JCR repository", re);
  		}
  	}
  }