001/* 002 * (C) Copyright 2006-2015 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Laurent Doguin <ldoguin@nuxeo.com> 018 * Vladimir Pasquier <vpasquier@nuxeo.com> 019 * 020 */ 021package org.nuxeo.ecm.platform.thumbnail.converter; 022 023import java.io.IOException; 024import java.io.Serializable; 025import java.util.Map; 026 027import org.nuxeo.ecm.core.api.Blob; 028import org.nuxeo.ecm.core.api.Blobs; 029import org.nuxeo.ecm.core.api.CloseableFile; 030import org.nuxeo.ecm.core.api.NuxeoException; 031import org.nuxeo.ecm.core.api.blobholder.BlobHolder; 032import org.nuxeo.ecm.core.convert.api.ConversionException; 033import org.nuxeo.ecm.core.convert.cache.SimpleCachableBlobHolder; 034import org.nuxeo.ecm.core.convert.extension.Converter; 035import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor; 036import org.nuxeo.ecm.platform.commandline.executor.api.CmdParameters; 037import org.nuxeo.ecm.platform.commandline.executor.api.CommandAvailability; 038import org.nuxeo.ecm.platform.commandline.executor.api.CommandException; 039import org.nuxeo.ecm.platform.commandline.executor.api.CommandLineExecutorService; 040import org.nuxeo.ecm.platform.commandline.executor.api.CommandNotAvailable; 041import org.nuxeo.ecm.platform.commandline.executor.api.ExecResult; 042import org.nuxeo.runtime.api.Framework; 043 044/** 045 * Converter bean managing the thumbnail conversion for picture documents 046 * 047 * @since 5.7 048 */ 049public class ThumbnailDocumentConverter implements Converter { 050 051 public static final String THUMBNAIL_CONVERTER_NAME = "toThumbnail"; 052 053 public static final String THUMBNAIL_SIZE_PARAMETER_NAME = "size"; 054 055 public static final String THUMBNAIL_DEFAULT_SIZE = "100x100"; 056 057 public static final String THUMBNAIL_COMMAND = "toThumbnail"; 058 059 @Override 060 public BlobHolder convert(BlobHolder blobHolder, Map<String, Serializable> parameters) throws ConversionException { 061 try { 062 // Make sure the toThumbnail command is available 063 CommandLineExecutorService cles = Framework.getLocalService(CommandLineExecutorService.class); 064 CommandAvailability commandAvailability = cles.getCommandAvailability(THUMBNAIL_COMMAND); 065 if (!commandAvailability.isAvailable()) { 066 return null; 067 } 068 // get the input and output of the command 069 Blob blob = blobHolder.getBlob(); 070 071 Blob targetBlob = Blobs.createBlobWithExtension(".png"); 072 targetBlob.setMimeType("image/png"); 073 try (CloseableFile source = blob.getCloseableFile()) { 074 CmdParameters params = cles.getDefaultCmdParameters(); 075 String size; 076 if (parameters != null && parameters.containsKey(THUMBNAIL_SIZE_PARAMETER_NAME)) { 077 size = (String) parameters.get(THUMBNAIL_SIZE_PARAMETER_NAME); 078 } else { 079 size = THUMBNAIL_DEFAULT_SIZE; 080 } 081 params.addNamedParameter(THUMBNAIL_SIZE_PARAMETER_NAME, size); 082 params.addNamedParameter("inputFilePath", source.getFile()); 083 params.addNamedParameter("outputFilePath", targetBlob.getFile()); 084 085 ExecResult res = cles.execCommand(THUMBNAIL_COMMAND, params); 086 if (!res.isSuccessful()) { 087 throw res.getError(); 088 } 089 } 090 return new SimpleCachableBlobHolder(targetBlob); 091 } catch (CommandNotAvailable | IOException | NuxeoException | CommandException e) { 092 throw new ConversionException("Thumbnail conversion failed", e); 093 } 094 } 095 096 @Override 097 public void init(ConverterDescriptor descriptor) { 098 } 099}