001/* 002 * (C) Copyright 2002-20012 Nuxeo SA (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Antoine Taillefer 016 */ 017package org.nuxeo.ecm.diff.content.converters; 018 019import java.io.Serializable; 020import java.util.Map; 021 022import org.apache.commons.logging.Log; 023import org.apache.commons.logging.LogFactory; 024import org.nuxeo.ecm.core.api.Blob; 025import org.nuxeo.ecm.core.api.blobholder.BlobHolder; 026import org.nuxeo.ecm.core.convert.api.ConversionException; 027import org.nuxeo.ecm.core.convert.api.ConversionService; 028import org.nuxeo.ecm.core.convert.api.ConverterNotRegistered; 029import org.nuxeo.runtime.api.Framework; 030 031/** 032 * HTML converter for content diff. 033 * <p> 034 * Uses the converter registered with sourceMimeType = mime type of the {@code blobHolder} and destinationMimeType = 035 * {@code text/html}. 036 * 037 * @author Antoine Taillefer (ataillefer@nuxeo.com) 038 * @since 5.6 039 */ 040public class ContentDiffHtmlConverter extends AbstractContentDiffConverter { 041 042 private static final Log LOGGER = LogFactory.getLog(ContentDiffHtmlConverter.class); 043 044 private static final String HTML_MIME_TYPE = "text/html"; 045 046 private static final String ANY_2_HTML_CONVERTER_NAME = "any2html"; 047 048 private static final String OFFICE_2_HTML_CONVERTER_NAME = "office2html"; 049 050 public BlobHolder convert(BlobHolder blobHolder, Map<String, Serializable> parameters) throws ConversionException { 051 052 String converterName = null; 053 054 // Fetch blob from blob holder 055 Blob blob = blobHolder.getBlob(); 056 if (blob == null) { 057 LOGGER.warn("Trying to convert a blob holder that has a null blob. Nothing to do, returning the blob holder."); 058 return blobHolder; 059 } 060 061 // Get HTML converter name from blob mime type 062 String mimeType = blob.getMimeType(); 063 ConversionService cs = Framework.getLocalService(ConversionService.class); 064 converterName = cs.getConverterName(mimeType, HTML_MIME_TYPE); 065 // We don't want to use the "any2html" converter contributed for the 066 // preview in the case of non pdf blobs since it uses the following 067 // conversion chain : any2pdf --> pdf2html. 068 // In this case we want to use the "office2html" converter which 069 // gives a better result when applying the HTMLContentDiffer on the 070 // converted HTML. 071 if (ANY_2_HTML_CONVERTER_NAME.equals(converterName) && !"application/pdf".equals(mimeType)) { 072 converterName = OFFICE_2_HTML_CONVERTER_NAME; 073 } 074 075 // No converter found, throw appropriate exception 076 if (converterName == null) { 077 throw new ConverterNotRegistered(String.format("for sourceMimeType = %s, destinationMimeType = %s", 078 mimeType, HTML_MIME_TYPE)); 079 } 080 081 return convert(converterName, blobHolder, parameters); 082 } 083 084}