git.aero2k.de Git - tmp/jakarta-migration.git/blob

   1 package org.collectionspace.services.nuxeo.extension.thumbnail;
   2
   3 import java.io.File;
   4 import java.io.Serializable;
   5 import java.util.Map;
   6
   7 import org.apache.commons.logging.Log;
   8 import org.apache.commons.logging.LogFactory;
   9
  10 import org.nuxeo.ecm.core.api.Blob;
  11 import org.nuxeo.ecm.core.api.blobholder.BlobHolder;
  12 import org.nuxeo.ecm.core.api.impl.blob.FileBlob;
  13 import org.nuxeo.ecm.core.api.impl.blob.StreamingBlob;
  14 import org.nuxeo.ecm.core.convert.api.ConversionException;
  15 import org.nuxeo.ecm.core.convert.cache.SimpleCachableBlobHolder;
  16 import org.nuxeo.ecm.core.convert.extension.Converter;
  17 import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor;
  18 import org.nuxeo.ecm.core.storage.sql.coremodel.SQLBlob;
  19 import org.nuxeo.ecm.platform.commandline.executor.api.CmdParameters;
  20 import org.nuxeo.ecm.platform.commandline.executor.api.CommandAvailability;
  21 import org.nuxeo.ecm.platform.commandline.executor.api.CommandLineExecutorService;
  22 import org.nuxeo.ecm.platform.commandline.executor.api.ExecResult;
  23 import org.nuxeo.ecm.platform.picture.core.im.IMImageUtils;
  24
  25 import org.nuxeo.runtime.api.Framework;
  26 import org.nuxeo.runtime.services.streaming.FileSource;
  27 import org.nuxeo.runtime.services.streaming.StreamSource;
  28
  29 public class ThumbnailConverter extends IMImageUtils implements Converter {
  30         private static final Log logger = LogFactory.getLog(ThumbnailConverter.class);
  31
  32         @Override
  33         public BlobHolder convert(BlobHolder blobHolder,
  34                         Map<String, Serializable> parameters) throws ConversionException {
  35                 try {
  36                         // Make sure the toThumbnail command is available
  37                         CommandLineExecutorService cles = Framework
  38                                         .getLocalService(CommandLineExecutorService.class);
  39                         CommandAvailability commandAvailability = cles
  40                                         .getCommandAvailability("toThumbnail");
  41                         if (!commandAvailability.isAvailable()) {
  42                                 return null;
  43                         }
  44                         // get the input and output of the command
  45                         Blob blob = blobHolder.getBlob();
  46                         File inputFile = null;
  47                         if (blob instanceof FileBlob) {
  48                                 inputFile = ((FileBlob) blob).getFile();
  49                         } else if (blob instanceof SQLBlob) {
  50                                 StreamSource source = ((SQLBlob) blob).getBinary()
  51                                                 .getStreamSource();
  52                                 inputFile = ((FileSource) source).getFile();
  53                         } else if (blob instanceof StreamingBlob) {
  54                                 StreamingBlob streamingBlob = ((StreamingBlob) blob);
  55                                 if (!streamingBlob.isPersistent()) {
  56                                         streamingBlob.persist();
  57                                 }
  58                                 StreamSource source = streamingBlob.getStreamSource();
  59                                 inputFile = ((FileSource) source).getFile();
  60                         }
  61                         if (inputFile == null) {
  62                                 return null; // Add a log message here
  63                         }
  64                         CmdParameters params = new CmdParameters();
  65                         File outputFile = File.createTempFile("nuxeoImageTarget", "."
  66                                         + "png");
  67                         String size = ThumbnailConstants.THUMBNAIL_DEFAULT_SIZE;
  68                         if (parameters != null) {
  69                                 if (parameters.containsKey(ThumbnailConstants.THUMBNAIL_SIZE_PARAMETER_NAME)) {
  70                                         size = (String) parameters.get(ThumbnailConstants.THUMBNAIL_SIZE_PARAMETER_NAME);
  71                                 }
  72                         }
  73                         params.addNamedParameter(ThumbnailConstants.THUMBNAIL_SIZE_PARAMETER_NAME, size);
  74                         params.addNamedParameter("inputFilePath", inputFile);
  75                         params.addNamedParameter("outputFilePath", outputFile);
  76
  77                         ExecResult res = cles.execCommand("toThumbnail", params);
  78                         if (!res.isSuccessful()) {
  79                                 return null;
  80                         }
  81                         Blob targetBlob = new FileBlob(outputFile);
  82                         Framework.trackFile(outputFile, targetBlob);
  83                         return new SimpleCachableBlobHolder(targetBlob);
  84                 } catch (Exception e) {
  85                         logger.trace("Could not create a thumbnail image using the Nuxeo conversion service", e);
  86                         throw new ConversionException("Thumbnail conversion has failed", e);
  87                 }
  88         }
  89
  90         @Override
  91         public void init(ConverterDescriptor descriptor) {
  92         }
  93 }