/**
* This file is part of Jahia, next-generation open source CMS:
* Jahia's next-generation, open source CMS stems from a widely acknowledged vision
* of enterprise application convergence - web, search, document, social and portal -
* unified by the simplicity of web content management.
*
* For more information, please visit http://www.jahia.com.
*
* Copyright (C) 2002-2012 Jahia Solutions Group SA. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* As a special exception to the terms and conditions of version 2.0 of
* the GPL (or any later version), you may redistribute this Program in connection
* with Free/Libre and Open Source Software ("FLOSS") applications as described
* in Jahia's FLOSS exception. You should have received a copy of the text
* describing the FLOSS exception, and it is also available here:
* http://www.jahia.com/license
*
* Commercial and Supported Versions of the program (dual licensing):
* alternatively, commercial and supported versions of the program may be used
* in accordance with the terms and conditions contained in a separate
* written agreement between you and Jahia Solutions Group SA.
*
* If you are unsure which license is appropriate for your use,
* please contact the sales department at sales@jahia.com.
*/
package org.jahia.modules.docconverter.rules;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import javax.jcr.RepositoryException;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.artofsolving.jodconverter.document.DocumentFormat;
import org.drools.spi.KnowledgeHelper;
import org.jahia.services.content.JCRContentUtils;
import org.jahia.services.content.JCRNodeWrapper;
import org.jahia.services.content.rules.AddedNodeFact;
import org.jahia.services.transform.DocumentConverterService;
/**
* Service class for converting documents from the right-hand-side
* (consequences) of rules.
*
* @author Sergiy Shyrkov
*/
public class DocumentConverterRuleService {
private static Logger logger = org.slf4j.LoggerFactory.getLogger(DocumentConverterRuleService.class);
private DocumentConverterService converterService;
/**
* Converts the specified node using target MIME type.
*
* @param nodeFact the node to be converted
* @param targetMimeType the target MIME type
* @param overwriteIfExists is set to true, the existing file should be
* overwritten if exists; otherwise the new file name will be
* generated automatically.
* @param drools the rule engine helper class
* @throws RepositoryException in case of an error
*/
public void convert(final AddedNodeFact nodeFact, final String targetMimeType, boolean overwriteIfExists,
KnowledgeHelper drools) throws RepositoryException {
if (!converterService.isEnabled()) {
logger.info("Conversion service is not enabled." + " Skip converting file " + nodeFact.getPath());
return;
}
if (logger.isDebugEnabled()) {
logger.debug("Converting node " + nodeFact.getPath() + " into target MIME type '" + targetMimeType + "'");
}
DocumentFormat format = converterService.getFormatByMimeType(targetMimeType);
if (format == null) {
logger.warn("Unsupported target MIME type '" + targetMimeType + "'. Skip converting file "
+ nodeFact.getPath());
return;
}
InputStream is = null;
try {
JCRNodeWrapper node = nodeFact.getNode();
if (node.isNodeType("nt:file")) {
is = node.getFileContent().downloadFile();
File temp = File.createTempFile("doc-converter-rule", null);
FileOutputStream os = new FileOutputStream(temp);
try {
converterService.convert(is, nodeFact.getMimeType(), os, targetMimeType);
os.close();
JCRNodeWrapper folder = node.getParent();
String newName = StringUtils.substringBeforeLast(node.getName(), ".") + "." + format.getExtension();
if (!overwriteIfExists) {
newName = JCRContentUtils.findAvailableNodeName(folder, newName);
}
FileInputStream convertedStream = new FileInputStream(temp);
try {
folder.uploadFile(newName, convertedStream, format.getMediaType());
logger.info("Converted node " + nodeFact.getPath() + " to type " + format.getMediaType());
} finally {
IOUtils.closeQuietly(convertedStream);
}
} finally {
IOUtils.closeQuietly(os);
FileUtils.deleteQuietly(temp);
}
} else {
logger.warn("Path should correspond to a file node. Skipping node " + nodeFact.getPath());
}
} catch (Exception e) {
logger.error(e.getMessage(), e);
} finally {
IOUtils.closeQuietly(is);
}
}
/**
* Injects an instance of the {@link DocumentConverterService}.
*
* @param converterService an instance of the
* {@link DocumentConverterService}
*/
public void setConverterService(DocumentConverterService converterService) {
this.converterService = converterService;
}
}