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/*
 * Copyright (C) 2004, 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 31. July 2004 by Joe Walnes
 */
package com.thoughtworks.xstream.converters.extended;

import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;

import java.util.regex.Pattern;

/**
 * Ensures java.util.regex.Pattern is compiled upon deserialization.
 */
public class RegexPatternConverter implements Converter {

    private Converter defaultConverter;

    public RegexPatternConverter(Converter defaultConverter) {
        this.defaultConverter = defaultConverter;
    }

    public boolean canConvert(final Class type) {
        return type.equals(Pattern.class);
    }

    public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
        defaultConverter.marshal(source, writer, context);
    }

    public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
        Pattern notCompiled = (Pattern) defaultConverter.unmarshal(reader, context);
        return Pattern.compile(notCompiled.pattern(), notCompiled.flags());
    }

}