/*
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.exoplatform.frameworks.jcr.command;

import java.io.InputStream;
import java.util.Calendar;

import javax.jcr.Item;
import javax.jcr.ItemNotFoundException;
import javax.jcr.Node;
import javax.jcr.RepositoryException;

/**
 * Created by The eXo Platform SAS.
 * 
 * @author Gennady Azarenkov
 * @version $Id: JCRCommandHelper.java 9857 2006-10-28 20:49:03Z geaz $
 */

public class JCRCommandHelper
{

   /**
    * creates nt:file node and fills it with incoming data
    * 
    * @param parentNode
    * @param relPath
    * @param data
    * @param mimeType
    * @return
    * @throws Exception
    */
   public static Node createResourceFile(Node parentNode, String relPath, Object data, String mimeType)
      throws Exception
   {

      Node file = parentNode.addNode(relPath, "nt:file");
      Node contentNode = file.addNode("jcr:content", "nt:resource");

      if (data instanceof InputStream)
         contentNode.setProperty("jcr:data", (InputStream)data);
      else if (data instanceof String)
         contentNode.setProperty("jcr:data", (String)data);
      // else if(data instanceof BinaryValue)
      // contentNode.setProperty("jcr:data", (BinaryValue)data);
      else
         throw new Exception("Invalid object for jcr:data " + data);

      contentNode.setProperty("jcr:mimeType", mimeType);
      contentNode.setProperty("jcr:lastModified", Calendar.getInstance());
      return file;

   }

   /**
    * traverses incoming node trying to find primary nt:resource node
    * 
    * @param node
    * @return nt:resource node
    * @throws ItemNotFoundException
    *           if no such node found
    * @throws RepositoryException
    */
   public static Node getNtResourceRecursively(Node node) throws ItemNotFoundException, RepositoryException
   {

      if (node.isNodeType("nt:resource"))
         return node;

      Item pi = node.getPrimaryItem();
      if (pi.isNode())
      {
         return getNtResourceRecursively((Node)pi);
      }
      throw new ItemNotFoundException("No nt:resource node found for " + node.getPath());
   }
}