// $Header: /home/cvs/jakarta-jmeter/src/protocol/http/org/apache/jmeter/protocol/http/util/EncoderCache.java,v 1.4 2004/02/12 00:29:50 sebb Exp $
/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
*/

package org.apache.jmeter.protocol.http.util;

import java.io.UnsupportedEncodingException;

import org.apache.jorphan.util.JOrphanUtils;
import org.apache.oro.util.Cache;
import org.apache.oro.util.CacheLRU;

/**
 * @author Administrator
 *
 * @version $Revision: 1.4 $ last updated $Date: 2004/02/12 00:29:50 $
 */
public class EncoderCache
{
    Cache cache;

    public EncoderCache(int cacheSize)
    {
       cache = new CacheLRU(cacheSize);
    }
    
    public String getEncoded(String k)
    {
        Object encodedValue = cache.getElement(k);
        if(encodedValue != null)
        {
            return (String)encodedValue;
        }
        try
        {
            encodedValue = JOrphanUtils.encode(k, "utf8");
        }
        catch (UnsupportedEncodingException e)
        {
            // This can't happen (how should utf8 not be supported!?!),
            // so just throw an Error:
            throw new Error("Should not happen: "+e.toString());
        }
        cache.addElement(k,encodedValue);
        return (String)encodedValue;
    }
}