/*
* Copyright (C) 2005 Joe Walnes.
* Copyright (C) 2006, 2007, 2008, 2009, 2014 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 22. January 2005 by Joe Walnes
*/
package com.thoughtworks.xstream.mapper;
import java.util.HashMap;
import java.util.Map;
import com.thoughtworks.xstream.InitializationException;
/**
* Mapper that resolves default implementations of classes. For example, mapper.serializedClass(ArrayList.class) will
* return java.util.List. Calling mapper.defaultImplementationOf(List.class) will return ArrayList.
*
* @author Joe Walnes
*/
public class DefaultImplementationsMapper extends MapperWrapper {
private final Map<Class<?>, Class<?>> typeToImpl = new HashMap<Class<?>, Class<?>>();
private transient Map<Class<?>, Class<?>> implToType = new HashMap<Class<?>, Class<?>>();
public DefaultImplementationsMapper(final Mapper wrapped) {
super(wrapped);
addDefaults();
}
protected void addDefaults() {
// null handling
addDefaultImplementation(null, Mapper.Null.class);
// register primitive types
addDefaultImplementation(Boolean.class, boolean.class);
addDefaultImplementation(Character.class, char.class);
addDefaultImplementation(Integer.class, int.class);
addDefaultImplementation(Float.class, float.class);
addDefaultImplementation(Double.class, double.class);
addDefaultImplementation(Short.class, short.class);
addDefaultImplementation(Byte.class, byte.class);
addDefaultImplementation(Long.class, long.class);
}
public void addDefaultImplementation(final Class<?> defaultImplementation, final Class<?> ofType) {
if (defaultImplementation != null && defaultImplementation.isInterface()) {
throw new InitializationException("Default implementation is not a concrete class: "
+ defaultImplementation.getName());
}
typeToImpl.put(ofType, defaultImplementation);
implToType.put(defaultImplementation, ofType);
}
@Override
public String serializedClass(final Class<?> type) {
final Class<?> baseType = implToType.get(type);
return baseType == null ? super.serializedClass(type) : super.serializedClass(baseType);
}
@Override
public Class<?> defaultImplementationOf(final Class<?> type) {
if (typeToImpl.containsKey(type)) {
return typeToImpl.get(type);
} else {
return super.defaultImplementationOf(type);
}
}
private Object readResolve() {
implToType = new HashMap<Class<?>, Class<?>>();
for (final Class<?> type : typeToImpl.keySet()) {
implToType.put(typeToImpl.get(type), type);
}
return this;
}
}