cdmlib-remote/src/main/java/eu/etaxonomy/cdm/remote/controller/MediaController.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2007 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10
  11 package eu.etaxonomy.cdm.remote.controller;
  12
  13 import java.io.IOException;
  14 import java.net.URI;
  15 import java.util.Arrays;
  16 import java.util.List;
  17 import java.util.Map;
  18 import java.util.Set;
  19 import java.util.UUID;
  20
  21 import javax.servlet.http.HttpServletRequest;
  22 import javax.servlet.http.HttpServletResponse;
  23
  24 import org.apache.http.HttpException;
  25 import org.springframework.beans.factory.annotation.Autowired;
  26 import org.springframework.stereotype.Controller;
  27 import org.springframework.web.bind.annotation.PathVariable;
  28 import org.springframework.web.bind.annotation.RequestMapping;
  29 import org.springframework.web.servlet.ModelAndView;
  30
  31 import eu.etaxonomy.cdm.api.service.IMediaService;
  32 import eu.etaxonomy.cdm.common.media.ImageInfo;
  33 import eu.etaxonomy.cdm.model.media.Media;
  34 import eu.etaxonomy.cdm.model.media.MediaRepresentation;
  35 import eu.etaxonomy.cdm.remote.exception.NoRecordsMatchException;
  36
  37 /**
  38  * TODO write controller documentation
  39  *
  40  * @author a.kohlbecker
  41  * @date 24.03.2009
  42  */
  43
  44 @Controller
  45 @RequestMapping(value = {"/media/{uuid}"})
  46 public class MediaController extends BaseController<Media, IMediaService>
  47 {
  48
  49     /* (non-Javadoc)
  50      * @see eu.etaxonomy.cdm.remote.controller.GenericController#setService(eu.etaxonomy.cdm.api.service.IService)
  51      */
  52     @Autowired
  53     @Override
  54     public void setService(IMediaService service) {
  55         this.service = service;
  56     }
  57     private static final List<String> MEDIA_INIT_STRATEGY = Arrays.asList(new String []{
  58             "*",
  59             "representations",
  60             "representations.parts"
  61     });
  62
  63     @RequestMapping(value = {"metadata"})
  64     public ModelAndView doGetMediaMetaData(@PathVariable("uuid") UUID uuid,
  65             HttpServletRequest request, HttpServletResponse response) throws IOException {
  66         Map<String, String> result;
  67
  68         ModelAndView mv = new ModelAndView();
  69         try{
  70             Media media = getCdmBaseInstance(uuid, response, MEDIA_INIT_STRATEGY);
  71
  72             Set<MediaRepresentation> representations = media.getRepresentations();
  73             //get first representation and retrieve the according metadata
  74
  75             Object[] repArray = representations.toArray();
  76             Object mediaRep = repArray[0];
  77             URI uri = null;
  78             try {
  79                 if (mediaRep instanceof MediaRepresentation){
  80                     MediaRepresentation medRep = (MediaRepresentation) mediaRep;
  81                     uri = medRep.getParts().get(0).getUri();
  82                     ImageInfo imageInfo = ImageInfo.NewInstanceWithMetaData(uri, 3000);
  83                     result = imageInfo.getMetaData();
  84                     if(result != null) {
  85                         mv.addObject(result);
  86                     }
  87                 }
  88             } catch (HttpException e) {
  89                 HttpStatusMessage.fromString("Reading media file from " + uri.toString() + " failed").setStatusCode(400).send(response);
  90             }
  91         } catch (NoRecordsMatchException e){
  92            /* IGNORE */
  93            /* java.lang.IllegalStateException: STREAM is thrown by the servlet container
  94             * if the model and view is returned after the http error has been send
  95             * so we return null here
  96             */
  97             return null;
  98
  99         }
 100         return mv;
 101
 102     }
 103
 104 }