/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.apache.chemistry.opencmis.client.runtime;
  
  import java.math.BigInteger;
  
  import org.apache.chemistry.opencmis.client.api.CmisObject;
  import org.apache.chemistry.opencmis.client.api.Document;
  import org.apache.chemistry.opencmis.client.api.OperationContext;
  import org.apache.chemistry.opencmis.client.api.Rendition;
  import org.apache.chemistry.opencmis.client.api.Session;
  import org.apache.chemistry.opencmis.client.bindings.spi.LinkAccess;
  import org.apache.chemistry.opencmis.commons.data.ContentStream;
  import org.apache.chemistry.opencmis.commons.exceptions.CmisConstraintException;
  import org.apache.chemistry.opencmis.commons.impl.dataobjects.RenditionDataImpl;
  
  /**
   * Implementation of <code>Rendition</code>.
   */
  public class RenditionImpl extends RenditionDataImpl implements Rendition {
  
      private static final long serialVersionUID = 1L;
  
      private final Session session;
      private final String objectId;
  
      /**
       * Constructor.
       */
      public RenditionImpl(Session session, String objectId, String streamId, String renditionDocumentId, String kind,
              long length, String mimeType, String title, int height, int width) {
          super(streamId, mimeType, BigInteger.valueOf(length), kind, title, BigInteger.valueOf(width), BigInteger
                  .valueOf(height), renditionDocumentId);
          this.session = session;
          this.objectId = objectId;
      }
  
      @Override
      public long getLength() {
          return getBigLength() == null ? -1 : getBigLength().longValue();
      }
  
      @Override
      public long getHeight() {
          return getBigHeight() == null ? -1 : getBigHeight().longValue();
      }
  
      @Override
      public long getWidth() {
          return getBigWidth() == null ? -1 : getBigWidth().longValue();
      }
  
      @Override
      public Document getRenditionDocument() {
          return getRenditionDocument(session.getDefaultContext());
      }
  
      @Override
      public Document getRenditionDocument(OperationContext context) {
          if (getRenditionDocumentId() == null) {
              return null;
          }
          CmisObject rendDoc = session.getObject(getRenditionDocumentId(), context);
          if (!(rendDoc instanceof Document)) {
              return null;
          }
  
          return (Document) rendDoc;
      }
  
      @Override
      public ContentStream getContentStream() {
          if (objectId == null || getStreamId() == null) {
              return null;
          }
  
          ContentStream contentStream;
          try {
              contentStream = session.getBinding().getObjectService()
                      .getContentStream(session.getRepositoryInfo().getId(), objectId, getStreamId(), null, null, null);
          } catch (CmisConstraintException e) {
              // no content stream
              return null;
         }
 
         if (contentStream == null) {
             return null;
         }
 
         String filename = contentStream.getFileName();
         if (filename == null) {
             filename = getTitle();
         }
         BigInteger bigLength = contentStream.getBigLength();
         if (bigLength == null) {
             bigLength = getBigLength();
         }
         long length = bigLength == null ? -1 : bigLength.longValue();
 
         return session.getObjectFactory().createContentStream(filename, length, contentStream.getMimeType(),
                 contentStream.getStream());
     }
 
     @Override
     public String getContentUrl() {
         if (session.getBinding().getObjectService() instanceof LinkAccess) {
             LinkAccess linkAccess = (LinkAccess) session.getBinding().getObjectService();
             return linkAccess.loadRenditionContentLink(session.getRepositoryInfo().getId(), objectId, getStreamId());
         }
 
         return null;
     }
 }