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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.
/*
* Copyright (C) 2005 Joe Walnes.
* Copyright (C) 2006, 2007, 2008, 2009, 2011, 2015 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 20. March 2005 by Joe Walnes
*/
package com.feilong.lib.xstream.mapper;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import com.feilong.lib.xstream.converters.ConverterLookup;
import com.feilong.lib.xstream.converters.SingleValueConverter;
import com.feilong.lib.xstream.converters.enums.EnumSingleValueConverter;
import com.feilong.lib.xstream.core.Caching;
/**
* Mapper that handles the special case of polymorphic enums in Java 1.5. This renames MyEnum$1 to MyEnum making it less
* bloaty in the XML and avoiding the need for an alias per enum value to be specified. Additionally every enum is
* treated automatically as immutable and non-refrenceable type that can be written as attribute.
*
* @author Joe Walnes
* @author Jörg Schaible
*/
public class EnumMapper extends MapperWrapper implements Caching{
private transient AttributeMapper attributeMapper;
private transient Map enumConverterMap;
/**
* @deprecated As of 1.3.1, use {@link #EnumMapper(Mapper)}
*/
@Deprecated
public EnumMapper(Mapper wrapped, ConverterLookup lookup){
super(wrapped);
readResolve();
}
public EnumMapper(Mapper wrapped){
super(wrapped);
readResolve();
}
@Override
public String serializedClass(Class type){
if (type == null){
return super.serializedClass(type);
}
if (Enum.class.isAssignableFrom(type) && type.getSuperclass() != Enum.class){
return super.serializedClass(type.getSuperclass());
}else if (EnumSet.class.isAssignableFrom(type)){
return super.serializedClass(EnumSet.class);
}else{
return super.serializedClass(type);
}
}
@Override
public boolean isImmutableValueType(Class type){
return (Enum.class.isAssignableFrom(type)) || super.isImmutableValueType(type);
}
@Override
public boolean isReferenceable(final Class type){
if (type != null && Enum.class.isAssignableFrom(type)){
return false;
}else{
return super.isReferenceable(type);
}
}
@Override
public SingleValueConverter getConverterFromItemType(String fieldName,Class type,Class definedIn){
SingleValueConverter converter = getLocalConverter(fieldName, type, definedIn);
return converter == null ? super.getConverterFromItemType(fieldName, type, definedIn) : converter;
}
@Override
public SingleValueConverter getConverterFromAttribute(Class definedIn,String attribute,Class type){
SingleValueConverter converter = getLocalConverter(attribute, type, definedIn);
return converter == null ? super.getConverterFromAttribute(definedIn, attribute, type) : converter;
}
private SingleValueConverter getLocalConverter(String fieldName,Class type,Class definedIn){
if (attributeMapper != null && Enum.class.isAssignableFrom(type)
&& attributeMapper.shouldLookForSingleValueConverter(fieldName, type, definedIn)){
synchronized (enumConverterMap){
SingleValueConverter singleValueConverter = enumConverterMap.get(type);
if (singleValueConverter == null){
singleValueConverter = super.getConverterFromItemType(fieldName, type, definedIn);
if (singleValueConverter == null){
@SuppressWarnings("unchecked")
Class enumType = type;
singleValueConverter = new EnumSingleValueConverter(enumType);
}
enumConverterMap.put(type, singleValueConverter);
}
return singleValueConverter;
}
}
return null;
}
@Override
public void flushCache(){
if (enumConverterMap.size() > 0){
synchronized (enumConverterMap){
enumConverterMap.clear();
}
}
}
private Object readResolve(){
this.enumConverterMap = new HashMap<>();
this.attributeMapper = (AttributeMapper) lookupMapperOfType(AttributeMapper.class);
return this;
}
}