001/* 002 * (C) Copyright 2013 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 * Thomas Roger 018 */ 019 020package org.nuxeo.ecm.platform.thumbnail.converter; 021 022import static org.nuxeo.ecm.platform.thumbnail.ThumbnailConstants.ANY_TO_PDF_TO_THUMBNAIL_CONVERTER_NAME; 023import static org.nuxeo.ecm.platform.thumbnail.ThumbnailConstants.PDF_AND_IMAGE_TO_THUMBNAIL_CONVERTER_NAME; 024 025import java.io.Serializable; 026import java.util.Map; 027import java.util.regex.Pattern; 028 029import org.nuxeo.ecm.core.api.Blob; 030import org.nuxeo.ecm.core.api.blobholder.BlobHolder; 031import org.nuxeo.ecm.core.convert.api.ConversionException; 032import org.nuxeo.ecm.core.convert.api.ConversionService; 033import org.nuxeo.ecm.core.convert.extension.Converter; 034import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor; 035import org.nuxeo.runtime.api.Framework; 036 037/** 038 * Base converter choosing the correct convert to generate a thumbnail according to the Blob's mime type. 039 * 040 * @since 5.8 041 */ 042public class AnyToThumbnailConverter implements Converter { 043 044 public static final String PDF_MIME_TYPE = "application/pdf"; 045 046 public static final Pattern PDF_MIME_TYPE_PATTERN = Pattern.compile("application/.*pdf"); 047 048 public static final String ANY_TO_PDF_CONVERTER_NAME = "any2pdf"; 049 050 @Override 051 public void init(ConverterDescriptor descriptor) { 052 } 053 054 @Override 055 public BlobHolder convert(BlobHolder blobHolder, Map<String, Serializable> parameters) throws ConversionException { 056 Blob sourceBlob; 057 sourceBlob = blobHolder.getBlob(); 058 if (sourceBlob == null) { 059 return null; 060 } 061 062 String mimeType = sourceBlob.getMimeType(); 063 if (mimeType == null) { 064 return null; 065 } 066 067 ConversionService conversionService = Framework.getService(ConversionService.class); 068 069 String converterName = null; 070 if ((mimeType.startsWith("image/") || PDF_MIME_TYPE_PATTERN.matcher(mimeType).matches()) 071 && conversionService.isConverterAvailable(PDF_AND_IMAGE_TO_THUMBNAIL_CONVERTER_NAME, true).isAvailable()) { 072 converterName = PDF_AND_IMAGE_TO_THUMBNAIL_CONVERTER_NAME; 073 } else if (conversionService.isSourceMimeTypeSupported(ANY_TO_PDF_CONVERTER_NAME, mimeType) 074 && conversionService.isConverterAvailable(ANY_TO_PDF_CONVERTER_NAME, true).isAvailable()) { 075 converterName = ANY_TO_PDF_TO_THUMBNAIL_CONVERTER_NAME; 076 } 077 return converterName == null ? null : conversionService.convert(converterName, blobHolder, parameters); 078 } 079}