/**
    * This file Copyright (c) 2017 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.ui.datasource.jcr;
  
  import static info.magnolia.ui.datasource.jcr.JcrSessionManager.TMP_DELETED_PROPERTY;
  
  import info.magnolia.jcr.RuntimeRepositoryException;
  import info.magnolia.jcr.decoration.ContentDecoratorPropertyWrapper;
  
  import javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  
  /**
   * JCR property wrapper in the spirit of {@link JcrNodeWrapper}.
   * The main purpose of such provider is to make property session re-attachment
   * a transparent process to the user.
   */
  public class JcrPropertyWrapper extends ContentDecoratorPropertyWrapper<JcrSessionManager> {
  
      private String path;
  
      JcrPropertyWrapper(Property property, JcrSessionManager decorator) {
          super(property, decorator);
          setWrappedProperty(property);
      }
  
      @Override
      protected void setWrappedProperty(Property property) {
          super.setWrappedProperty(property);
          try {
              this.path = property.getPath();
          } catch (RepositoryException e) {
              throw new RuntimeRepositoryException(e);
          }
      }
  
      @Override
      public Property getWrappedProperty() {
          Property property = super.getWrappedProperty();
          try {
              if (!property.getSession().isLive()) {
                  Session session = getContentDecorator().getJCRSession().getWrappedSession();
                  property = session.propertyExists(path) ? session.getProperty(path) : getDeletedItem(session);
              } else {
                  property = getContentDecorator().exists(property) ? property : getDeletedItem(super.getWrappedProperty().getSession());
              }
          } catch (RepositoryException e) {
              throw new RuntimeRepositoryException(e);
          }
          return property;
      }
  
      @Override
      public String getPath() throws RepositoryException {
          return getContentDecorator().exists(this) ? super.getPath() : path;
      }
  
      @Override
      public boolean equals(Object obj) {
          return obj instanceof JcrPropertyWrapper && ((JcrPropertyWrapper) obj).path.equals(this.path);
      }
  
      @Override
      public int hashCode() {
          return path.hashCode();
      }
 
     private Property getDeletedItem(Session session) throws RepositoryException {
         Node root = session.getRootNode();
         return root.setProperty(TMP_DELETED_PROPERTY, TMP_DELETED_PROPERTY);
     }
 }