com.github.veithen.visualwas.connector.impl.ObjectDataHandler Maven / Gradle / Ivy

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/*
 * #%L
 * VisualWAS
 * %%
 * Copyright (C) 2013 - 2016 Andreas Veithen
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * .
 * #L%
 */
package com.github.veithen.visualwas.connector.impl;

import java.io.IOException;
import java.io.OutputStream;

import javax.activation.CommandMap;
import javax.activation.DataContentHandler;
import javax.activation.DataHandler;

/**
 * {@link DataHandler} implementation that outputs the enclosed object using Java serialization.
 * Note that the correct way to handle this would be to implement a {@link DataContentHandler} and
 * to map it to a content type using a {@link CommandMap}. However, it is much easier to extend
 * {@link DataHandler} and to just override {@link DataHandler#writeTo(OutputStream)}, especially
 * because we know that Axiom only uses that method (and never {@link DataHandler#getDataSource()}.
 */
public class ObjectDataHandler extends DataHandler {
    private final InvocationContextImpl context;
    
    public ObjectDataHandler(Object object, InvocationContextImpl context) {
        super(object, "application/x-java-object");
        this.context = context;
    }
    
    @Override
    public void writeTo(OutputStream out) throws IOException {
        context.getSerializer().writeObject(getContent(), out, context);
    }
}