ImageTransformActionExecuter


1   /*
2    * Copyright (C) 2005 Alfresco, Inc.
3    *
4    * Licensed under the Mozilla Public License version 1.1 
5    * with a permitted attribution clause. You may obtain a
6    * copy of the License at
7    *
8    *   http://www.alfresco.org/legal/license.txt
9    *
10   * Unless required by applicable law or agreed to in writing,
11   * software distributed under the License is distributed on an
12   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13   * either express or implied. See the License for the specific
14   * language governing permissions and limitations under the
15   * License.
16   */
17  package org.alfresco.repo.action.executer;
18  
19  import java.util.HashMap  ;
20  import java.util.List  ;
21  import java.util.Map  ;
22  
23  import org.alfresco.repo.action.ParameterDefinitionImpl;
24  import org.alfresco.repo.content.transform.magick.ImageMagickContentTransformer;
25  import org.alfresco.service.cmr.action.Action;
26  import org.alfresco.service.cmr.action.ParameterDefinition;
27  import org.alfresco.service.cmr.dictionary.DataTypeDefinition;
28  import org.alfresco.service.cmr.repository.ContentReader;
29  import org.alfresco.service.cmr.repository.ContentWriter;
30  import org.alfresco.service.cmr.repository.NoTransformerException;
31  
32  /**
33   * Transfor action executer
34   * 
35   * @author Roy Wetherall
36   */
37  public class ImageTransformActionExecuter extends TransformActionExecuter 
38  {
39      /**
40       * Action constants
41       */
42      public static final String   NAME = "transform-image";
43      public static final String   PARAM_CONVERT_COMMAND = "convert-command";
44      
45      private ImageMagickContentTransformer imageMagickContentTransformer;
46      
47      /**
48       * Set the image magick content transformer
49       * 
50       * @param imageMagickContentTransformer     the conten transformer
51       */
52      public void setImageMagickContentTransformer(ImageMagickContentTransformer imageMagickContentTransformer) 
53      {
54          this.imageMagickContentTransformer = imageMagickContentTransformer;
55      }
56      
57      /**
58       * Add parameter definitions
59       */
60      @Override  
61      protected void addParameterDefintions(List  <ParameterDefinition> paramList) 
62      {
63          super.addParameterDefintions(paramList);
64          paramList.add(new ParameterDefinitionImpl(PARAM_CONVERT_COMMAND, DataTypeDefinition.TEXT, false, getParamDisplayLabel(PARAM_CONVERT_COMMAND)));
65      }
66      
67      /**
68       * @see org.alfresco.repo.action.executer.TransformActionExecuter#doTransform(org.alfresco.service.cmr.action.Action, org.alfresco.service.cmr.repository.ContentReader, org.alfresco.service.cmr.repository.ContentWriter)
69       */
70      protected void doTransform(Action ruleAction, ContentReader contentReader, ContentWriter contentWriter)
71      {
72          // check if the transformer is going to work, i.e. is available
73          if (!this.imageMagickContentTransformer.isAvailable())
74          {
75              throw new NoTransformerException(contentReader.getMimetype(), contentWriter.getMimetype());
76          }
77          // Try and transform the content
78          String   convertCommand = (String  )ruleAction.getParameterValue(PARAM_CONVERT_COMMAND);
79          // create some options for the transform
80          Map  <String  , Object  > options = new HashMap  <String  , Object  >(5);
81          options.put(ImageMagickContentTransformer.KEY_OPTIONS, convertCommand);
82          
83          this.imageMagickContentTransformer.transform(contentReader, contentWriter, options);    
84      }
85  }
86
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