net.osgiliath.helpers.cxf.exception.handling.jaxrs.mapper.ExceptionXmlMapper.java Source code

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Here is the source code for net.osgiliath.helpers.cxf.exception.handling.jaxrs.mapper.ExceptionXmlMapper.java

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package net.osgiliath.helpers.cxf.exception.handling.jaxrs.mapper;

/*
 * #%L
 * net.osgiliath.helpers.cxf.exception.handling
 * %%
 * Copyright (C) 2013 Osgiliath corp
 * %%
 * 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.
 * #L%
 */

import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;

import net.osgiliath.helpers.cxf.exception.handling.ExceptionMappingConstants;

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.output.Format;
import org.jdom2.output.XMLOutputter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * CXF exception Mapper.
 * 
 * @author Charlie
 * 
 */
public class ExceptionXmlMapper implements ExceptionMapper<Exception> {
    /**
     * The Logger.
     */
    private static final Logger LOG = LoggerFactory.getLogger(ExceptionXmlMapper.class);

    /**
     * Map the catched Exception to the response body (xml format).
     */
    @Override
    public Response toResponse(Exception arg0) {
        // On cree une instance de SAXBuilder
        final Element root = new Element("Exception");
        final Document doc = new Document(root);
        this.populateXML(arg0, root);
        final String res = new XMLOutputter(Format.getPrettyFormat()).outputString(doc);
        LOG.info("CXF exception thrown: " + res, arg0);
        return Response.status(Response.Status.FORBIDDEN).type(MediaType.APPLICATION_XML)
                .header(ExceptionMappingConstants.EXCEPTION_BODY_HEADER, res).build();

    }

    /**
     * Create the xml description of an exception.
     * 
     * @param arg0
     *          the Throwable
     * @param root
     *          the Xml Element (Jdom)
     */
    private void populateXML(Throwable arg0, Element root) {
        final Element clazz = new Element("class");
        clazz.setText(arg0.getClass().getSimpleName());
        root.getChildren().add(clazz);
        final Element message = new Element("message");
        message.setText(arg0.getMessage());
        root.getChildren().add(message);
        final Element localizedMessage = new Element("localizedMessage");
        localizedMessage.setText(arg0.getLocalizedMessage());
        root.getChildren().add(localizedMessage);
        if (arg0.getCause() != null) {
            final Element cause = new Element("Cause");
            root.getChildren().add(cause);
            this.populateXML(arg0.getCause(), cause);
        }
    }

}