/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.soa.esb.actions.naming;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.xerces.parsers.DOMParser;
import org.jboss.soa.esb.actions.AbstractActionPipelineProcessor;
import org.jboss.soa.esb.actions.ActionProcessingException;
import org.jboss.soa.esb.actions.BeanConfiguredAction;
import org.jboss.soa.esb.actions.naming.strategy.FileNamingStrategy;
import org.jboss.soa.esb.common.Environment;
import org.jboss.soa.esb.message.Message;
import org.jboss.soa.esb.util.ClassUtil;
import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* Action that generates a filename based on a naming strategy.
*
* @author Derek Adams
*/
public class FileNameGeneratorAction extends AbstractActionPipelineProcessor implements
BeanConfiguredAction {
/** Property name for incoming file name */
private String fileNameProperty = Environment.ORIGINAL_FILE_NAME_MSG_PROP;
/** Property name for filename after processing */
private String resultProperty = DEFAULT_RESULT_PROPERTY;
/** String containing XML for configured strategies */
private String strategies;
/** List of strategy instances created from XML */
protected List<FileNamingStrategy> strategyImpls;
/** Default name for processing result */
public static final String DEFAULT_RESULT_PROPERTY = "org.jboss.soa.esb.naming.result";
/** Tag for strategy element */
public static final String ELEMENT_STRATEGY = "strategy";
/** Class attribute */
public static final String ATTR_CLASS = "class";
/*
* (non-Javadoc)
*
* @see org.jboss.soa.esb.actions.ActionPipelineProcessor#process(org.jboss.soa.esb.message.Message)
*/
public Message process(Message message) throws ActionProcessingException {
String currentFilename = (String) message.getProperties().getProperty(getFileNameProperty());
for (FileNamingStrategy strategy : strategyImpls) {
currentFilename = strategy.process(currentFilename, message);
}
message.getProperties().setProperty(getResultProperty(), currentFilename);
return message;
}
/**
* Create a List of strategy implentations from the XML.
*/
protected void createStrategies() {
strategyImpls = new ArrayList<FileNamingStrategy>();
try {
DOMParser parser = new DOMParser();
InputSource source = new InputSource(new StringReader(getStrategies()));
parser.parse(source);
Document doc = parser.getDocument();
NodeList strategyNodes = doc.getElementsByTagName(ELEMENT_STRATEGY);
for (int i = 0; i < strategyNodes.getLength(); i++) {
FileNamingStrategy strategy = createStrategy(strategyNodes.item(i));
strategyImpls.add(strategy);
}
} catch (SAXException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/**
* Create a strategy instance given a DOM node.
*
* @param strategyNode
* @return FileNamingStrategy
*/
protected FileNamingStrategy createStrategy(Node strategyNode) {
Node classNode = strategyNode.getAttributes().getNamedItem(ATTR_CLASS);
if (classNode == null) {
throw new RuntimeException("Strategy does not have 'class' attribute.");
}
try {
Class strategyClass = ClassUtil.forName(classNode.getNodeValue(), this.getClass());
FileNamingStrategy strategy = (FileNamingStrategy) strategyClass.newInstance();
strategy.configure(strategyNode);
return strategy;
} catch (DOMException e) {
throw new RuntimeException(e);
} catch (ClassNotFoundException e) {
throw new RuntimeException(e);
} catch (InstantiationException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
/**
* Set the property that holds the initial file name.
*
* @param fileNameProperty
*/
public void setFileNameProperty(String fileNameProperty) {
this.fileNameProperty = fileNameProperty;
}
/**
* Get the property that holds the initial file name.
*
* @return String
*/
public String getFileNameProperty() {
return fileNameProperty;
}
/**
* Set the property that holds the processed file name.
*
* @param resultProperty
*/
public void setResultProperty(String resultProperty) {
this.resultProperty = resultProperty;
}
/**
* Get the property that holds the processed file name.
*
* @return String
*/
public String getResultProperty() {
return resultProperty;
}
/**
* Set the string containing XML for strategies.
*
* @param strategies
*/
public void setStrategies(String strategies) {
this.strategies = strategies;
this.createStrategies();
}
/**
* Set the string containing XML for strategies.
*
* @return String
*/
public String getStrategies() {
return strategies;
}
}