de.drv.dsrv.extra.marshaller.impl.ExtraUnmarschaller.java Source code

Introduction

Here is the source code for de.drv.dsrv.extra.marshaller.impl.ExtraUnmarschaller.java

Source

/*
 * 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.
 */
package de.drv.dsrv.extra.marshaller.impl;

import java.io.IOException;
import java.io.InputStream;

import javax.inject.Inject;
import javax.inject.Named;
import javax.xml.bind.JAXBElement;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.oxm.Unmarshaller;
import org.springframework.oxm.XmlMappingException;
import org.springframework.oxm.jaxb.Jaxb2Marshaller;
import org.springframework.util.Assert;

import de.drv.dsrv.extra.marshaller.IExtraUnmarschaller;
import de.drv.dsrv.extrastandard.namespace.response.ResponseTransport;

/**
 * @author Leonid Potap
 * @version $Id$
 */
@Named("extraUnmarschaller")
public class ExtraUnmarschaller implements IExtraUnmarschaller {

    private static final Logger logger = LoggerFactory.getLogger(ExtraUnmarschaller.class);
    @Inject
    @Named("eXTrajaxb2Marshaller")
    private Jaxb2Marshaller validationJaxb2Marshaller;

    @Inject
    @Named("eXTraNoValidationjaxb2Marshaller")
    private Jaxb2Marshaller noValidationJaxb2Marshaller;

    /*
     * (non-Javadoc)
     * 
     * @see
     * de.drv.dsrv.extra.marshaller.IExtraUnmarschaller#unmarschall(java.io.
     * InputStream, java.lang.Class)
     */
    @Override
    public <X> X unmarshal(final InputStream inputStream, final Class<X> extraTransportClass)
            throws XmlMappingException, IOException {
        return unmarshal(inputStream, extraTransportClass, false);
    }

    @Override
    public <X> X unmarshal(final Source source, final Class<X> extraTransportClass, final boolean validation)
            throws XmlMappingException, IOException {
        Assert.notNull(source, "StreamSource is null");
        Assert.notNull(extraTransportClass, "ExtraTransportClass is null");

        final Unmarshaller unmarshaller = findUnmarschaller(validation);
        final Object responseObject = unmarshaller.unmarshal(source);
        logger.debug("ResponseObject Class: {}", responseObject.getClass());
        Assert.notNull(responseObject, "Response is null");
        X extraTransport = null;
        if (ResponseTransport.class.isAssignableFrom(responseObject.getClass())) {
            extraTransport = extraTransportClass.cast(responseObject);
        } else if (JAXBElement.class.isAssignableFrom(responseObject.getClass())) {
            // TODO Wie funktioniert es besser?
            @SuppressWarnings("rawtypes")
            final JAXBElement jaxbElementResponse = JAXBElement.class.cast(responseObject);
            final Object jaxBElementValue = jaxbElementResponse.getValue();

            Assert.isAssignable(extraTransportClass, jaxBElementValue.getClass(),
                    "JaxBElement.value  can not be converted to the response.ResponseTransport");
            extraTransport = extraTransportClass.cast(jaxBElementValue);
        } else {
            throw new IllegalArgumentException(
                    "Response can not be converted to the response.ResponseTransport. ResponseObjectClass: "
                            + responseObject.getClass());
        }
        return extraTransport;
    }

    @Override
    public <X> X unmarshal(final InputStream inputStream, final Class<X> extraTransportClass,
            final boolean validation) throws XmlMappingException, IOException {
        Assert.notNull(inputStream, "InputStream is null");
        Assert.notNull(extraTransportClass, "ExtraTransportClass is null");
        final StreamSource inputStreamSource = new StreamSource(inputStream);
        return unmarshal(inputStreamSource, extraTransportClass, validation);
    }

    private Jaxb2Marshaller findUnmarschaller(final boolean validation) {
        Jaxb2Marshaller marshaller = null;
        if (validation) {
            marshaller = validationJaxb2Marshaller;
        } else {
            marshaller = noValidationJaxb2Marshaller;
        }
        return marshaller;
    }

    @Override
    public <X> X unmarshal(final Source source, final Class<X> extraTransportClass)
            throws XmlMappingException, IOException {
        return unmarshal(source, extraTransportClass, false);
    }
}