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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: TransformBean.java 470245 2006-11-02 06:34:33Z minchau $
*/
import java.io.PrintWriter;
import java.io.StringWriter;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.ErrorListener;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
/**
* @author Morten Jorgensen
*/
public class TransformBean implements SessionBean {
private SessionContext m_context = null;
private final static String nullErrorMsg =
"<h1>XSL transformation error</h1>"+
"<p>'null' parameters sent to the XSL transformation bean's "+
"<tt>transform(String document, String translet)</tt> method.</p>";
private static final String NAMESPACE_FEATURE =
"http://xml.org/sax/features/namespaces";
/**
* Generates HTML from a basic error message and an exception
*/
private void errorMsg(PrintWriter out, Exception e, String msg) {
out.println("<h1>Error</h1>");
out.println("<p>"+msg+"</p><br>");
out.println(e.toString());
}
/**
* Main bean entry point
*/
public String transform(String document, String transletName) {
// Initialise the output stream
final StringWriter sout = new StringWriter();
final PrintWriter out = new PrintWriter(sout);
try {
if ((document == null) || (transletName == null)) {
out.println(nullErrorMsg);
}
else {
TransformerFactory tf = TransformerFactory.newInstance();
try {
tf.setAttribute("use-classpath", Boolean.TRUE);
} catch (IllegalArgumentException iae) {
System.err.println(
"Could not set XSLTC-specific TransformerFactory "
+ "attributes. Transformation failed.");
}
Transformer t =
tf.newTransformer(new StreamSource(transletName));
// Do the actual transformation
final long start = System.currentTimeMillis();
t.transform(new StreamSource(document),
new StreamResult(out));
final long done = System.currentTimeMillis() - start;
out.println("<!-- transformed by XSLTC in "+done+"msecs -->");
}
}
catch (Exception e) {
errorMsg(out, e, "Impossible state reached.");
}
// Now close up the sink, and return the HTML output in the
// StringWrite object as a string.
out.close();
return sout.toString();
}
/**
*
*/
public void setSessionContext(SessionContext context) {
m_context = context;
}
// General EJB entry points
public void ejbCreate() { }
public void ejbRemove() { }
public void ejbActivate() { }
public void ejbPassivate() { }
public void ejbLoad() { }
public void ejbStore() { }
}
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