/**
    * This file Copyright (c) 2010-2010 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.info/mna.html
   * 
   * Any modifications to this file must keep this entire header
   * intact.
   * 
   */
  package info.magnolia.cms.core;
  
  import info.magnolia.cms.security.AccessDeniedException;
  import info.magnolia.cms.security.Permission;
  
  import java.io.InputStream;
  import java.util.ArrayList;
  import java.util.Calendar;
  import java.util.Collection;
  
  import javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.PropertyIterator;
  import javax.jcr.PropertyType;
  import javax.jcr.RepositoryException;
  import javax.jcr.Value;
  
  /**
   * A node data hiding the fact that node datas of type BINARY are stored as nodes of type {@link ItemType#NT_RESOURCE}.
   * @author pbaerfuss
   * @version $Id$
   */
  public class BinaryNodeData extends AbstractNodeData {
  
      /**
       * The node containing the binary and attributes.
       */
      private Node binaryNode;
      
      /**
       * The property containing the binary.
       * @see ItemType.JCR_DATA
       */
      private Property binaryProperty;
  
      protected BinaryNodeData(Content parent, String name) {
          super(parent, name);
      }
  
      public Property getJCRProperty() {
          if(binaryProperty == null){
              if(isExist()){
                  try {
                      binaryProperty = getBinaryNode(false).getProperty(ItemType.JCR_DATA);
                  }
                  catch (RepositoryException e) {
                      throw new IllegalStateException(e);
                  }
              }
          }
          return binaryProperty;
      }
      
      protected Node getBinaryNode(boolean createIfNotExisting) {
          if(binaryNode == null){
              Node parentJCRNode = parent.getJCRNode();
              try {
                  if(parentJCRNode.hasNode(name)){
                      binaryNode = parentJCRNode.getNode(name);
                  }
                  else if(createIfNotExisting){
                      binaryNode = parentJCRNode.addNode(name, ItemType.NT_RESOURCE);
                  }
              }
              catch (RepositoryException e) {
                  throw new RuntimeException(e);
             }
         }
         return binaryNode;
     }
 
     public boolean isExist() {
         return getBinaryNode(false) != null;
     }
 
     public InputStream getStream() {
         if (isExist()) {
             try {
                 return getJCRProperty().getStream();
             }
             catch (RepositoryException e) {
                 throw new RuntimeException("Can't read value of node data" + toString());
             }
         }
         else {
             return null;
         }
     }
     
     public void setValue(InputStream value) throws RepositoryException, AccessDeniedException {
         Access.isGranted(getHierarchyManager().getAccessManager(), Path.getAbsolutePath(this.getHandle()), Permission.SET);
         getBinaryNode(true).setProperty(ItemType.JCR_DATA, value);
     }
 
     public void delete() throws RepositoryException {
         Access.isGranted(getHierarchyManager().getAccessManager(), getHandle(), Permission.REMOVE);
         if(isExist()){
             getBinaryNode(false).remove();
         }
     }
 
     public void setAttribute(String name, String value) throws RepositoryException, AccessDeniedException, UnsupportedOperationException {
         Access.isGranted(getHierarchyManager().getAccessManager(), Path.getAbsolutePath(this.getHandle()), Permission.SET);
         getBinaryNode(true).setProperty(name, value);
     }
 
     public void setAttribute(String name, Calendar value) throws RepositoryException, AccessDeniedException, UnsupportedOperationException {
         Access.isGranted(getHierarchyManager().getAccessManager(), Path.getAbsolutePath(this.getHandle()), Permission.SET);
         getBinaryNode(true).setProperty(name, value);
     }
 
     public String getAttribute(String name) {
         if(isExist()){
             Node binaryNode = getBinaryNode(false);
             try {
                 if(binaryNode.hasProperty(name)){
                     return binaryNode.getProperty(name).getString();
                 }
             }
             catch (RepositoryException e) {
                 throw new IllegalStateException("Can't read attribute", e);
             }
         }
         return "";
     }
 
     public Collection<String> getAttributeNames() throws RepositoryException {
         Collection<String> names = new ArrayList<String>();
         if(isExist()){
             PropertyIterator properties = getBinaryNode(false).getProperties();
             while (properties.hasNext()) {
                 String name = properties.nextProperty().getName();
                 if (!name.equalsIgnoreCase(ItemType.JCR_DATA)) {
                     names.add(name);
                 }
             }
         }
         return names;
     }
 
     public int getType() {
         return PropertyType.BINARY;
     }
 
     public Value getValue() {
         if(isExist()){
             try {
                 return getJCRProperty().getValue();
             }
             catch (RepositoryException e) {
                 throw new IllegalStateException(e);
             }
         }
         return null;
     }
 
     public long getContentLength() {
         if(!isExist()){
             return 0;
         }
 
         try {
             return getJCRProperty().getLength();
         }
         catch (RepositoryException re) {
             throw new RuntimeException(re);
         }
     }
 
     public int isMultiValue() {
         return MULTIVALUE_FALSE;
     }
 
     public void refresh(boolean keepChanges) throws RepositoryException {
         if(isExist()){
             getBinaryNode(false).refresh(keepChanges);
         }
     }
 
     public void save() throws RepositoryException {
         if(isExist()){
             getBinaryNode(false).save();
         }
     }
 
     public Content getReferencedContent() throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public Content getReferencedContent(String repositoryId) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     protected Content getContentFromJCRReference() throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public String getString() {
         if(isExist()){
             try {
                 return getJCRProperty().getString();
             }
             catch (RepositoryException e) {
                 throw new RuntimeException("Can't read value of node data" + toString());
             }
         }
         return "";
     }
 
     public Calendar getDate() {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public boolean getBoolean() {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
     
     public double getDouble() {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public long getLong() {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public Value[] getValues() {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public void setValue(String value) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public void setValue(int value) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public void setValue(long value) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public void setValue(double value) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public void setValue(boolean value) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public void setValue(Calendar value) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public void setValue(Content value) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public void setValue(Value value) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 
     public void setValue(Value[] value) throws RepositoryException {
         throw new UnsupportedOperationException("This operation is not supported on node datas of type BINARY");
     }
 }