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.IOException; 020import java.io.Serializable; 021import java.util.Map; 022 023import org.apache.commons.lang.StringUtils; 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.ConverterNotRegistered; 028 029/** 030 * Text converter for content diff. 031 * <p> 032 * Uses the "any2text" converter. 033 * 034 * @author Antoine Taillefer (ataillefer@nuxeo.com) 035 * @since 5.6 036 */ 037public class ContentDiffTextConverter extends AbstractContentDiffConverter { 038 039 private static final String ANY_2_TEXT_CONVERTER_NAME = "any2text"; 040 041 public BlobHolder convert(BlobHolder blobHolder, Map<String, Serializable> parameters) throws ConversionException { 042 043 BlobHolder convertedBlobHolder = convert(ANY_2_TEXT_CONVERTER_NAME, blobHolder, parameters); 044 045 String convertedBlobString = null; 046 try { 047 Blob convertedBlob = convertedBlobHolder.getBlob(); 048 if (convertedBlob != null) { 049 convertedBlobString = convertedBlob.getString(); 050 } 051 } catch (IOException e) { 052 throw new ConversionException("Error while getting converted blob string."); 053 } 054 if (StringUtils.isEmpty(convertedBlobString)) { 055 // Converted blob is an empty string, this means no text 056 // converter was found (see FullTextConverter). Throw 057 // appropriate exception. 058 String srcMimeType = null; 059 Blob blob = blobHolder.getBlob(); 060 if (blob != null) { 061 srcMimeType = blob.getMimeType(); 062 } 063 throw new ConverterNotRegistered(String.format("for sourceMimeType = %s, destinationMimeType = text/plain", 064 srcMimeType)); 065 } 066 return convertedBlobHolder; 067 } 068 069}