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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) 2011, 2018 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 11. October 2011 by Joerg Schaible
 */
package com.feilong.lib.xstream.converters.collections;

import java.util.Collections;

import com.feilong.lib.xstream.converters.UnmarshallingContext;
import com.feilong.lib.xstream.io.HierarchicalStreamReader;
import com.feilong.lib.xstream.mapper.Mapper;

/**
 * Converts a singleton map to XML, specifying an 'entry'
 * element with 'key' and 'value' children.
 * 
 * Note: 'key' and 'value' is not the name of the generated tag. The
 * children are serialized as normal elements and the implementation expects
 * them in the order 'key'/'value'.
 * 
 * 
 * Supports Collections.singletonMap.
 * 
 * 
 * @author Jörg Schaible
 * @since 1.4.2
 */
public class SingletonMapConverter extends MapConverter{

    private static final Class MAP = Collections.singletonMap(Boolean.TRUE, null).getClass();

    /**
     * Construct a SingletonMapConverter.
     * 
     * @param mapper
     * @since 1.4.2
     */
    public SingletonMapConverter(Mapper mapper){
        super(mapper);
    }

    @Override
    public boolean canConvert(Class type){
        return MAP == type;
    }

    @Override
    public Object unmarshal(HierarchicalStreamReader reader,UnmarshallingContext context){
        reader.moveDown();
        final Object key = readCompleteItem(reader, context, null);
        final Object value = readCompleteItem(reader, context, null);
        reader.moveUp();

        return Collections.singletonMap(key, value);
    }

}