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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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/*
 * Copyright (C) 2017 XStream Committers.
 * All rights reserved.
 *
 * The software in this package is published under the terms of the BSD
 * style license a copy of which has been included with this distribution in
 * the LICENSE.txt file.
 *
 * Created on 06. March 2017 by Joerg Schaible
 */
package com.feilong.lib.xstream.converters.time;

import java.time.Clock;
import java.time.ZoneId;

import com.feilong.lib.xstream.converters.Converter;
import com.feilong.lib.xstream.converters.MarshallingContext;
import com.feilong.lib.xstream.converters.UnmarshallingContext;
import com.feilong.lib.xstream.io.ExtendedHierarchicalStreamWriterHelper;
import com.feilong.lib.xstream.io.HierarchicalStreamReader;
import com.feilong.lib.xstream.io.HierarchicalStreamWriter;
import com.feilong.lib.xstream.mapper.Mapper;

/**
 * Converts a system {@link Clock}, using zone as nested element.
 *
 * @author Jörg Schaible
 * @since 1.4.10
 */
public class SystemClockConverter implements Converter{

    private final Mapper   mapper;

    private final Class type;

    /**
     * Constructs a SystemClockConverter instance.
     * 
     * @param mapper
     *            the Mapper instance
     */
    public SystemClockConverter(final Mapper mapper){
        this.mapper = mapper;
        type = Clock.systemUTC().getClass();
    }

    @Override
    public boolean canConvert(final Class type){
        return type == this.type;
    }

    @Override
    public void marshal(final Object source,final HierarchicalStreamWriter writer,final MarshallingContext context){
        final Clock clock = (Clock) source;
        ExtendedHierarchicalStreamWriterHelper.startNode(writer, mapper.serializedMember(Clock.class, "zone"), null);
        context.convertAnother(clock.getZone());
        writer.endNode();
    }

    @Override
    public Object unmarshal(final HierarchicalStreamReader reader,final UnmarshallingContext context){
        reader.moveDown();
        final ZoneId zone = (ZoneId) context.convertAnother(null, ZoneId.class);
        reader.moveUp();
        return Clock.system(zone);
    }
}