HessianReaderWriter.java

/*
 * Copyright 2015 Petr Bouda
 *
 * 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.joyrest.hessian;

import java.io.IOException;
import java.io.Serializable;

import org.joyrest.model.http.MediaType;
import org.joyrest.model.request.InternalRequest;
import org.joyrest.model.response.InternalResponse;
import org.joyrest.routing.entity.Type;
import org.joyrest.transform.AbstractReaderWriter;

import com.caucho.hessian.io.Hessian2Input;
import com.caucho.hessian.io.Hessian2Output;

public class HessianReaderWriter extends AbstractReaderWriter {

    private final MediaType supportedMediaType = MediaType.SERIALIZATION_HESSIAN;

    @Override
    @SuppressWarnings("unchecked")
    public <T> T readFrom(InternalRequest<Object> request, Type<T> clazz) {
        try {
            Hessian2Input in = new Hessian2Input(request.getInputStream());
            in.startMessage();
            T object = (T) in.readObject();
            in.completeMessage();
            return object;
        } catch (IOException e) {
            throw new RuntimeException("An error occurred during unmarshalling from Hessian.", e);
        }
    }

    @Override
    public void writeTo(InternalResponse<?> response, InternalRequest<?> request) {
        try {
            Hessian2Output out = new Hessian2Output(response.getOutputStream());
            out.startMessage();
            out.writeObject(response.getEntity().get());
            out.completeMessage();
            out.flushBuffer();
            out.flush();
        } catch (IOException e) {
            throw new RuntimeException("An error occurred during marshalling to Hessian.", e);
        }
    }

    @Override
    public boolean isClassCompatible(Class<?> clazz) {
        return Serializable.class.isAssignableFrom(clazz);
    }

    @Override
    public MediaType getMediaType() {
        return supportedMediaType;
    }
}