/**
* Copyright (C) 2010 Orbeon, Inc.
*
* This program 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 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 Lesser General Public License for more details.
*
* The full text of the license is available at http://www.gnu.org/copyleft/lesser.html
*/
package org.orbeon.oxf.processor.generator;
import org.orbeon.dom.Document;
import org.orbeon.oxf.common.OXFException;
import org.orbeon.oxf.common.ValidationException;
import org.orbeon.oxf.externalcontext.ExternalContext;
import org.orbeon.oxf.pipeline.api.PipelineContext;
import org.orbeon.oxf.xml.XMLReceiver;
import org.orbeon.oxf.processor.*;
import org.orbeon.oxf.xml.SAXStore;
import org.orbeon.oxf.xml.XMLConstants;
import org.orbeon.oxf.xml.XPathUtils;
import org.orbeon.oxf.xml.dom4j.LocationData;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
public class SessionGenerator extends ProcessorImpl {
public SessionGenerator() {
addInputInfo(new ProcessorInputOutputInfo(INPUT_CONFIG));
addOutputInfo(new ProcessorInputOutputInfo(OUTPUT_DATA));
}
@Override
public ProcessorOutput createOutput(String name) {
final ProcessorOutput output = new ProcessorOutputImpl(SessionGenerator.this, name) {
public void readImpl(PipelineContext context, final XMLReceiver xmlReceiver) {
try {
String key = readCacheInputAsObject(context, getInputByName(INPUT_CONFIG),
new CacheableInputReader<String>() {
public String read(org.orbeon.oxf.pipeline.api.PipelineContext context, ProcessorInput input) {
Document dom = readInputAsOrbeonDom(context, input);
try {
String key = XPathUtils.selectStringValueNormalize(dom, "/key");
if (key == null)
throw new ValidationException("Config input must contain a key element",
(LocationData) dom.getRootElement().getData());
else
return key;
} catch (Exception e) {
throw new OXFException(e);
}
}
});
ExternalContext externalContext = (ExternalContext) context.getAttribute(org.orbeon.oxf.pipeline.api.PipelineContext.EXTERNAL_CONTEXT);
// If there is a session, try to read the object
ExternalContext.Session session = externalContext.getSession(false);
Object value = (session == null) ? null : session.javaGetAttribute(key);
if (value == null) {
generateNullDocument(key, xmlReceiver);
} else if (value instanceof SAXStore) {
SAXStore store = (SAXStore) value;
store.replay(xmlReceiver);
} else
throw new OXFException("session object " + key + " is of unknown type: " + value.getClass().getName());
} catch (Exception e) {
throw new OXFException(e);
}
}
};
addOutput(OUTPUT_DATA, output);
return output;
}
private void generateNullDocument(String key, ContentHandler ch) throws SAXException {
ch.startDocument();
AttributesImpl attr = new AttributesImpl();
attr.addAttribute(XMLConstants.XSI_URI, XMLConstants.XSI_NIL_ATTRIBUTE, XMLConstants.XSI_PREFIX + ":" + XMLConstants.XSI_NIL_ATTRIBUTE, "CDATA", "true");
ch.startElement("", key, key, attr);
ch.endElement("", key, key);
ch.endDocument();
}
}