/**
 * Copyright (C) FuseSource, Inc.
 * http://fusesource.com
 *
 * 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 io.fabric8.dosgi.api;

import io.fabric8.dosgi.util.ClassLoaderObjectInputStream;
import org.fusesource.hawtbuf.DataByteArrayInputStream;
import org.fusesource.hawtbuf.DataByteArrayOutputStream;

import java.io.IOException;
import java.io.ObjectOutputStream;

/**
 * <p>
 * </p>
 *
 * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
 */
public class ObjectSerializationStrategy implements SerializationStrategy {
    public static final ObjectSerializationStrategy INSTANCE = new ObjectSerializationStrategy();

    public String name() {
        return "object";
    }

    public void encodeRequest(ClassLoader loader, Class<?>[] types, Object[] args, DataByteArrayOutputStream target) throws IOException {
        ObjectOutputStream oos = new ObjectOutputStream(target);
        oos.writeObject(args);
        oos.flush();
    }

    public void decodeResponse(ClassLoader loader, Class<?> type, DataByteArrayInputStream source, AsyncCallback result) throws IOException, ClassNotFoundException {
        ClassLoaderObjectInputStream ois = new ClassLoaderObjectInputStream(source);
        ois.setClassLoader(loader);
        Throwable error = (Throwable) ois.readObject();
        Object value = ois.readObject();
        if (error != null) {
            result.onFailure(error);
        } else {
            result.onSuccess(value);
        }
    }

    public void decodeRequest(ClassLoader loader, Class<?>[] types, DataByteArrayInputStream source, Object[] target) throws IOException, ClassNotFoundException {
        final ClassLoaderObjectInputStream ois = new ClassLoaderObjectInputStream(source);
        ois.setClassLoader(loader);
        final Object[] args = (Object[]) ois.readObject();
        if( args!=null ) {
            System.arraycopy(args, 0, target, 0, args.length);
        }
    }


    public void encodeResponse(ClassLoader loader, Class<?> type, Object value, Throwable error, DataByteArrayOutputStream target) throws IOException, ClassNotFoundException {
        ObjectOutputStream oos = new ObjectOutputStream(target);
        oos.writeObject(error);
        oos.writeObject(value);
        oos.flush();
    }


}
