Serializer.java

/**
 * Copyright (c) Members of the EGEE Collaboration. 2006-2009.
 * See http://www.eu-egee.org/partners/ for details on the copyright holders.
 *
 * Licensed 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.
 */

package org.glite.authz.pap.common.opensamlserializer;

import java.io.IOException;

import javax.xml.namespace.QName;

import org.apache.axis.Constants;
import org.apache.axis.encoding.SerializationContext;
import org.apache.axis.wsdl.fromJava.Types;
import org.glite.authz.pap.common.xacml.impl.PolicySetTypeString;
import org.glite.authz.pap.common.xacml.impl.PolicyTypeString;
import org.glite.authz.pap.common.xacml.utils.XMLObjectHelper;
import org.opensaml.xml.XMLObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;

/**
 * @author Valerio Venturi (valerio.venturi@cnaf.infn.it)
 * 
 */
public class Serializer implements org.apache.axis.encoding.Serializer {

	private static final long serialVersionUID = -4207218164610553717L;
	@SuppressWarnings("unused")
	private static final Logger log = LoggerFactory.getLogger(Serializer.class);

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.apache.axis.encoding.Serializer#serialize(javax.xml.namespace.QName,
	 * org.xml.sax.Attributes, java.lang.Object,
	 * org.apache.axis.encoding.SerializationContext)
	 */
	public void serialize(QName name, Attributes attributes, Object value, SerializationContext context)
			throws IOException {

		try {

			String elementAsString;

			if (value instanceof PolicyTypeString) {

				elementAsString = ((PolicyTypeString) value).getPolicyString();

			} else if (value instanceof PolicySetTypeString) {

				elementAsString = ((PolicySetTypeString) value).getPolicySetString();

			} else {

				XMLObject xmlObject = (XMLObject) value;

				Element element = XMLObjectHelper.marshall(xmlObject);

				if (attributes != null) {
					for (int i = 0; i < attributes.getLength(); i++) {
						element.setAttributeNS(attributes.getURI(i), attributes.getQName(i), attributes
								.getValue(i));
					}
				}

				elementAsString = XMLObjectHelper.toString(element);

				xmlObject.releaseChildrenDOM(true);
				xmlObject.releaseDOM();
			}

			String element;
			int index = elementAsString.indexOf("?>");
			if (index != -1) {
				element = elementAsString.substring(index + 2);
			} else {
				element = elementAsString;
			}

			context.setWriteXMLType(null);
			context.writeString(element);

		} catch (Exception exception) {

			throw new IOException("Error serializing " + value.getClass().getName() + " : "
					+ exception.getClass().getName());

		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.apache.axis.encoding.Serializer#writeSchema(java.lang.Class,
	 * org.apache.axis.wsdl.fromJava.Types)
	 */
	@SuppressWarnings("unchecked")
	public Element writeSchema(Class javaType, Types types) throws Exception {
		Element complexType = types.createElement("complexType");
		return complexType;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.xml.rpc.encoding.Serializer#getMechanismType()
	 */
	public String getMechanismType() {
		// TODO Auto-generated method stub
		return Constants.AXIS_SAX;
	}

}