/*
* JBoss, a division of Red Hat
* Copyright 2010, Red Hat Middleware, LLC, 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.gatein.wsrp.payload;
import org.gatein.common.util.ParameterValidation;
import org.gatein.wsrp.WSRPTypeFactory;
import org.gatein.wsrp.api.extensions.UnmarshalledExtension;
import org.oasis.wsrp.v2.Event;
import org.oasis.wsrp.v2.EventPayload;
import org.oasis.wsrp.v2.NamedStringArray;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.TypeInfo;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSSerializer;
import org.xml.sax.InputSource;
import javax.xml.XMLConstants;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.Serializable;
import java.io.StringReader;
import java.util.HashMap;
import java.util.Map;
/**
* @author <a href="mailto:chris.laprun@jboss.com">Chris Laprun</a>
* @version $Revision$
*/
public class PayloadUtils
{
private static final Map<String, XSDTypeConverter> typeToConverters = new HashMap<String, XSDTypeConverter>(19);
private static final Map<Class, XSDTypeConverter> classToConverters = new HashMap<Class, XSDTypeConverter>(19);
private static final ThreadLocal<DocumentBuilder> documentBuilder = new ThreadLocal<DocumentBuilder>()
{
@Override
protected DocumentBuilder initialValue()
{
DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
builderFactory.setNamespaceAware(true);
try
{
return builderFactory.newDocumentBuilder();
}
catch (ParserConfigurationException e)
{
throw new RuntimeException("Couldn't get a DocumentBuilder", e);
}
}
};
static
{
XSDTypeConverter[] converterArray = XSDTypeConverter.values();
for (XSDTypeConverter converter : converterArray)
{
typeToConverters.put(converter.typeName(), converter);
// reverse mapping, unfortunately, there's not a one to one mapping from Java to XSD so converters with
// null Java types are considered secondary... Semantic analysis could possibly be used...
Class javaType = converter.getJavaType();
if (javaType != null)
{
classToConverters.put(javaType, converter);
}
}
}
public static Serializable getPayloadAsSerializable(Event event)
{
EventPayload payload = event.getPayload();
if (payload == null)
{
return null;
}
ParameterValidation.throwIllegalArgExceptionIfNull(event, "Payload expected type");
Object any = payload.getAny();
if (any == null)
{
NamedStringArray namedStringArray = payload.getNamedStringArray();
if (namedStringArray != null)
{
return new SerializableNamedStringArray(namedStringArray);
}
else
{
return null;
}
}
else
{
Element element = (Element)any;
QName type = event.getType();
if (type != null)
{
String typeName = type.getLocalPart();
if (XMLConstants.W3C_XML_SCHEMA_NS_URI.equals(type.getNamespaceURI()))
{
// if we want a default simple datatype, convert it directly
XSDTypeConverter converter = typeToConverters.get(typeName);
if (converter == null)
{
throw new IllegalArgumentException("Don't know how to deal with standard type: " + type);
}
return new SerializableSimplePayload(element, converter.parseFromXML(element.getTextContent()), converter);
}
}
return new SerializablePayload(element);
}
}
public static EventPayload getPayloadAsEventPayload(Event eventNeedingType, Serializable payload)
{
if (payload instanceof SerializableNamedStringArray)
{
SerializableNamedStringArray stringArray = (SerializableNamedStringArray)payload;
return WSRPTypeFactory.createEventPayloadAsNamedString(stringArray.toNamedStringArray());
}
else if (payload instanceof SerializablePayload)
{
if (payload instanceof SerializableSimplePayload)
{
eventNeedingType.setType(((SerializableSimplePayload)payload).getConverter().getXSDType());
}
return WSRPTypeFactory.createEventPayloadAsAny(((SerializablePayload)payload).getElement());
}
else
{
Class payloadClass = payload.getClass();
// try to get a converter from the payload class to assert a simple XSD type if possible
XSDTypeConverter converter = classToConverters.get(payloadClass);
if (converter != null)
{
eventNeedingType.setType(converter.getXSDType());
}
// Marshall payload to XML
QName name = eventNeedingType.getName();
try
{
return WSRPTypeFactory.createEventPayloadAsAny(marshallPayload(payload, payloadClass, name));
}
catch (Exception e)
{
throw new IllegalArgumentException("Couldn't marshall payload " + payload, e);
}
}
}
public static Element marshallPayload(Serializable payload)
{
ParameterValidation.throwIllegalArgExceptionIfNull(payload, "Payload");
final Class<? extends Serializable> payloadClass = payload.getClass();
XSDTypeConverter converter = classToConverters.get(payloadClass);
if (converter == null)
{
throw new IllegalArgumentException("Don't know hot to marshall payload " + payload);
}
else
{
try
{
return marshallPayload(payload, payloadClass, converter.getXSDType());
}
catch (Exception e)
{
throw new IllegalArgumentException("Couldn't marshall payload " + payload, e);
}
}
}
public static Serializable unmarshallPayload(Object object)
{
ParameterValidation.throwIllegalArgExceptionIfNull(object, "Object to unmarshall");
if (object instanceof Element)
{
Element element = (Element)object;
String namespace = element.getNamespaceURI();
if (XMLConstants.W3C_XML_SCHEMA_NS_URI.equals(namespace))
{
final TypeInfo type = element.getSchemaTypeInfo();
String typeName = type.getTypeName();
if (typeName == null)
{
// try to determine the type name based on the tag name
// tag name will have prefix so that we need to remove it
String tagName = element.getTagName();
int prefixEnd = tagName.indexOf(':');
typeName = prefixEnd == -1 ? tagName : tagName.substring(prefixEnd + 1);
}
// if we want a default simple datatype, convert it directly
XSDTypeConverter converter = typeToConverters.get(typeName);
if (converter == null)
{
throw new IllegalArgumentException("Don't know how to deal with standard type: " + type);
}
return converter.parseFromXML(element.getTextContent());
}
}
else if (object instanceof Serializable)
{
return (Serializable)object;
}
throw new IllegalArgumentException("Cannot unmarshall element with unknown type");
}
public static UnmarshalledExtension unmarshallExtension(Object object)
{
if (object instanceof Element)
{
Element element = (Element)object;
Object value = element;
String namespace = element.getNamespaceURI();
// get the tag name without namespace prefix
String tagName = element.getTagName();
int prefixEnd = tagName.indexOf(':');
tagName = prefixEnd == -1 ? tagName : tagName.substring(prefixEnd + 1);
// attempt to convert to simple datatype value
if (XMLConstants.W3C_XML_SCHEMA_NS_URI.equals(namespace))
{
final TypeInfo type = element.getSchemaTypeInfo();
String typeName = type.getTypeName();
if (typeName == null)
{
// try to determine the type name based on the tag name
typeName = tagName;
}
// if we want a default simple datatype, convert it directly
XSDTypeConverter converter = typeToConverters.get(typeName);
if (converter == null)
{
throw new IllegalArgumentException("Don't know how to deal with standard type: " + type);
}
value = converter.parseFromXML(element.getTextContent());
}
return new UnmarshalledExtension(tagName, value, namespace);
}
throw new IllegalArgumentException("Cannot unmarshall extension '" + object + "'");
}
private static Element marshallPayload(Serializable payload, Class payloadClass, QName name) throws JAXBException, ParserConfigurationException
{
JAXBContext context = JAXBContext.newInstance(payloadClass);
Marshaller marshaller = context.createMarshaller();
JAXBElement<Serializable> element = new JAXBElement<Serializable>(name, payloadClass, payload);
Document document = getDocument();
marshaller.marshal(element, document);
return document.getDocumentElement();
}
public static Element marshallExtension(Object value)
{
if (value instanceof Element)
{
return (Element)value;
}
try
{
return marshallPayload((Serializable)value);
}
catch (Exception e)
{
throw new IllegalArgumentException("Couldn't marshall extension '" + value + "'");
}
}
private static Document getDocument()
{
return documentBuilder.get().newDocument();
}
public static String outputToXML(Element node)
{
Document document = node.getOwnerDocument();
DOMImplementationLS domImplLS = (DOMImplementationLS)document.getImplementation();
LSSerializer serializer = domImplLS.createLSSerializer();
return serializer.writeToString(node);
}
public static Element createElement(String namespaceURI, String name)
{
return getDocument().createElementNS(namespaceURI, name);
}
public static Element parseFromXMLString(String xml)
{
try
{
return documentBuilder.get().parse(new InputSource(new StringReader(xml))).getDocumentElement();
}
catch (Exception e)
{
throw new RuntimeException("Couldn't parse '" + xml + "' as a DOM Element.", e);
}
}
}