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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) 2007, 2008 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. November 2007 by Joerg Schaible
 */
package com.feilong.lib.xstream.mapper;

import java.util.HashMap;
import java.util.Map;

import com.feilong.lib.xstream.converters.Converter;
import com.feilong.lib.xstream.converters.SingleValueConverter;
import com.feilong.lib.xstream.core.util.FastField;

/**
 * A Mapper for locally defined converters for a member field.
 * 
 * @author Jörg Schaible
 * @since 1.3
 */
public class LocalConversionMapper extends MapperWrapper{

    private final Map                 localConverters = new HashMap();

    private transient AttributeMapper attributeMapper;

    /**
     * Constructs a LocalConversionMapper.
     * 
     * @param wrapped
     * @since 1.3
     */
    public LocalConversionMapper(Mapper wrapped){
        super(wrapped);
        readResolve();
    }

    public void registerLocalConverter(Class definedIn,String fieldName,Converter converter){
        localConverters.put(new FastField(definedIn, fieldName), converter);
    }

    @Override
    public Converter getLocalConverter(Class definedIn,String fieldName){
        return (Converter) localConverters.get(new FastField(definedIn, fieldName));
    }

    @Override
    public SingleValueConverter getConverterFromAttribute(Class definedIn,String attribute,Class type){
        SingleValueConverter converter = getLocalSingleValueConverter(definedIn, attribute, type);
        return converter == null ? super.getConverterFromAttribute(definedIn, attribute, type) : converter;
    }

    @Override
    public SingleValueConverter getConverterFromItemType(String fieldName,Class type,Class definedIn){
        SingleValueConverter converter = getLocalSingleValueConverter(definedIn, fieldName, type);
        return converter == null ? super.getConverterFromItemType(fieldName, type, definedIn) : converter;
    }

    private SingleValueConverter getLocalSingleValueConverter(Class definedIn,String fieldName,Class type){
        if (attributeMapper != null && attributeMapper.shouldLookForSingleValueConverter(fieldName, type, definedIn)){
            Converter converter = getLocalConverter(definedIn, fieldName);
            if (converter != null && converter instanceof SingleValueConverter){
                return (SingleValueConverter) converter;
            }
        }
        return null;
    }

    private Object readResolve(){
        this.attributeMapper = (AttributeMapper) lookupMapperOfType(AttributeMapper.class);
        return this;
    }
}