/**
    * This file Copyright (c) 2011-2013 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.jcr.decoration;
  
  import javax.jcr.AccessDeniedException;
  import javax.jcr.Item;
  import javax.jcr.ItemExistsException;
  import javax.jcr.ItemNotFoundException;
  import javax.jcr.Node;
  import javax.jcr.PathNotFoundException;
  import javax.jcr.Property;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  import javax.jcr.Workspace;
  import javax.jcr.lock.LockException;
  import javax.jcr.nodetype.ConstraintViolationException;
  import javax.jcr.version.VersionException;
  
  import info.magnolia.jcr.wrapper.DelegateSessionWrapper;
  
  /**
   * Session wrapper that applies wrappers and filtering by delegating to a {@link ContentDecorator}.
   * 
   * @param <D> implementation of decorator.
   */
  public class ContentDecoratorSessionWrapper<D extends ContentDecorator> extends DelegateSessionWrapper {
  
      private final D contentDecorator;
  
      public ContentDecoratorSessionWrapper(Session session, D contentDecorator) {
          super(session);
          this.contentDecorator = contentDecorator;
      }
  
      public D getContentDecorator() {
          return contentDecorator;
      }
  
      @Override
      public boolean itemExists(String absPath) throws RepositoryException {
          boolean exists = super.itemExists(absPath);
          if (!exists) {
              return false;
          }
          Item item = super.getItem(absPath);
          if (item.isNode()) {
              return contentDecorator.evaluateNode((Node) item);
          } else {
              return contentDecorator.evaluateProperty((Property) item);
          }
      }
  
      @Override
      public Item getItem(String absPath) throws PathNotFoundException, RepositoryException {
          Item item = super.getItem(absPath);
          if (item.isNode()) {
              if (!contentDecorator.evaluateNode((Node) item)) {
                  throw new PathNotFoundException(absPath);
              }
              return wrapNode((Node) item);
          } else {
              if (!contentDecorator.evaluateProperty((Property) item)) {
                  throw new PathNotFoundException(absPath);
              }
              return wrapProperty((Property) item);
          }
      }
  
     @Override
     public void removeItem(String absPath) throws VersionException, LockException, ConstraintViolationException, AccessDeniedException, RepositoryException {
         if (!itemExists(absPath)) {
             throw new PathNotFoundException(absPath);
         }
         super.removeItem(absPath);
     }
 
     @Override
     public Node getRootNode() throws RepositoryException {
         return wrapNode(super.getRootNode());
     }
 
     @Override
     public boolean nodeExists(String absPath) throws RepositoryException {
         return super.nodeExists(absPath) && contentDecorator.evaluateNode(super.getNode(absPath));
     }
 
     @Override
     public Node getNode(String absPath) throws PathNotFoundException, RepositoryException {
         Node node = super.getNode(absPath);
         if (!contentDecorator.evaluateNode(node)) {
             throw new PathNotFoundException(absPath);
         }
         return wrapNode(node);
     }
 
     @Override
     public Node getNodeByIdentifier(String id) throws ItemNotFoundException, RepositoryException {
         Node node = super.getNodeByIdentifier(id);
         if (!contentDecorator.evaluateNode(node)) {
             throw new ItemNotFoundException(id);
         }
         return wrapNode(node);
     }
 
     @Override
     public Node getNodeByUUID(String uuid) throws ItemNotFoundException, RepositoryException {
         Node node = super.getNodeByUUID(uuid);
         if (!contentDecorator.evaluateNode(node)) {
             throw new ItemNotFoundException(uuid);
         }
         return wrapNode(node);
     }
 
     @Override
     public boolean propertyExists(String absPath) throws RepositoryException {
         return super.propertyExists(absPath) && contentDecorator.evaluateProperty(super.getProperty(absPath));
     }
 
     @Override
     public Property getProperty(String absPath) throws PathNotFoundException, RepositoryException {
         Property property = super.getProperty(absPath);
         if (!contentDecorator.evaluateProperty(property)) {
             throw new PathNotFoundException(absPath);
         }
         return wrapProperty(property);
     }
 
     @Override
     public void move(String srcAbsPath, String destAbsPath) throws ItemExistsException, PathNotFoundException, VersionException, ConstraintViolationException, LockException, RepositoryException {
         if (!nodeExists(srcAbsPath)) {
             throw new PathNotFoundException(srcAbsPath);
         }
         super.move(srcAbsPath, destAbsPath);
     }
 
     @Override
     public Workspace getWorkspace() {
         return wrapWorkspace(super.getWorkspace());
     }
 
     protected Workspace wrapWorkspace(Workspace workspace) {
         return contentDecorator.wrapWorkspace(workspace);
     }
 
     protected Node wrapNode(Node node) {
         return contentDecorator.wrapNode(node);
     }
 
     protected Property wrapProperty(Property property) {
         return contentDecorator.wrapProperty(property);
     }
 }