/*
* Copyright (c) 2007-2009, Sosnoski Software Associates Limited. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of
* JiBX nor the names of its contributors may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jibx.ws.codec;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* Cache for codec instances. The methods exposed by this class are not threadsafe, so the using code needs to
* synchronize before accessing the cache.
*
* @author Dennis M. Sosnoski
*/
public class CodecCache
{
/** Map from media type key to codec instance. */
private final Map m_codecMap;
/**
* Constructor.
*/
public CodecCache() {
m_codecMap = new HashMap();
}
/**
* Get a codec. If an instance of the codec has been created previously, that instance will be returned. Otherwise a
* new codec will be created, cached, and returned.
* <p>
* Any parameters on the mediatype are ignored.
*
* @param mediaType the media type
* @return codec
* @throws IOException if no codecs for specified mediatype
*/
public final XmlCodec getCodec(MediaType mediaType) throws IOException {
String key = CodecDirectory.getCodecKey(mediaType);
XmlCodec codec = (XmlCodec)m_codecMap.get(key);
if (codec == null) {
codec = CodecDirectory.getCodec(mediaType);
if (codec == null) {
throw new IOException("Unknown media type '" + mediaType + "'");
}
m_codecMap.put(key, codec);
}
return codec;
}
}