com.freedomotic.persistence.PayloadConverter Maven / Gradle / Ivy

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/**
 *
 * Copyright (c) 2009-2014 Freedomotic team
 * http://freedomotic.com
 *
 * This file is part of Freedomotic
 *
 * 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 2, 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 Freedomotic; see the file COPYING.  If not, see
 * .
 */
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.freedomotic.persistence;

import com.freedomotic.rules.Payload;
import com.freedomotic.rules.Statement;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.logging.Logger;

/**
 *
 * @author Enrico
 */
public class PayloadConverter
        implements Converter {

    /**
     *
     * @param o
     * @param writer
     * @param mc
     */
    @Override
    public void marshal(Object o, HierarchicalStreamWriter writer, MarshallingContext mc) {
        Payload payload = (Payload) o;
        writer.startNode("payload");
        Iterator it = payload.iterator();
        while (it.hasNext()) {
            Statement statement = it.next();
            writer.startNode("com.freedomotic.reactions.Statement");
            writer.startNode("logical");
            writer.setValue(statement.getLogical());
            writer.endNode(); //
            writer.startNode("attribute");
            writer.setValue(statement.getAttribute());
            writer.endNode(); //
            writer.startNode("operand");
            writer.setValue(statement.getOperand());
            writer.endNode(); //
            writer.startNode("value");
            writer.setValue(statement.getValue());
            writer.endNode(); //
            writer.endNode(); //
        }

        writer.endNode(); //
    }

    /**
     *
     * @param reader
     * @param uc
     * @return
     */
    @Override
    public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext uc) {
        Payload payload = new Payload();
        reader.moveDown(); //goes down to 

        while (reader.hasMoreChildren()) { // are the childs of payload
            reader.moveDown();

            ArrayList statementValues = new ArrayList();

            while (reader.hasMoreChildren()) { //childs of statement (logical, attribute, ...)
                reader.moveDown();
                statementValues.add(reader.getValue());
                reader.moveUp();
            }

            payload.addStatement(statementValues.get(0),
                    statementValues.get(1),
                    statementValues.get(2),
                    statementValues.get(3));
            reader.moveUp(); //next 
        } //no more  (childs of payload)

        reader.moveUp(); //goes up to the next 
        reader.moveUp(); //goes up to the next 

        return payload;
    }

    /**
     *
     * @param clazz
     * @return
     */
    @Override
    public boolean canConvert(Class clazz) {
        return clazz.equals(Payload.class);
    }
    private static final Logger LOG = Logger.getLogger(PayloadConverter.class.getName());
}