ImmutableTypesMapper.java

/*
 * Copyright (C) 2005 Joe Walnes.
 * Copyright (C) 2006, 2007 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 com.thoughtworks.xstream.alias.ClassMapper;

import java.util.HashSet;
import java.util.Set;

/**
 * Mapper that specifies which types are basic immutable types. Types that are marked as immutable will be written
 * multiple times in the serialization stream without using references.
 *
 * @author Joe Walnes
 */
public class ImmutableTypesMapper extends MapperWrapper {

    private final Set immutableTypes = new HashSet();

    public ImmutableTypesMapper(Mapper wrapped) {
        super(wrapped);
    }

    /**
     * @deprecated As of 1.2, use {@link #ImmutableTypesMapper(Mapper)}
     */
    public ImmutableTypesMapper(ClassMapper wrapped) {
        this((Mapper)wrapped);
    }

    public void addImmutableType(Class type) {
        immutableTypes.add(type);
    }

    public boolean isImmutableValueType(Class type) {
        if (immutableTypes.contains(type)) {
            return true;
        } else {
            return super.isImmutableValueType(type);
        }
    }

}