/*
* Copyright 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.myfaces.context.servlet;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
/**
* HttpServletRequest header values (multi-value headers) as Map of String[].
*
* @author Anton Koinov (latest modification by $Author$)
* @version $Revision$ $Date$
*/
public class RequestHeaderValuesMap extends AbstractAttributeMap
{
private final HttpServletRequest _httpServletRequest;
private final Map _valueCache = new HashMap();
RequestHeaderValuesMap(HttpServletRequest httpServletRequest)
{
_httpServletRequest = httpServletRequest;
}
protected Object getAttribute(String key)
{
Object ret = _valueCache.get(key);
if (ret == null)
{
_valueCache.put(key, ret = toArray(_httpServletRequest
.getHeaders(key)));
}
return ret;
}
protected void setAttribute(String key, Object value)
{
throw new UnsupportedOperationException(
"Cannot set HttpServletRequest HeaderValues");
}
protected void removeAttribute(String key)
{
throw new UnsupportedOperationException(
"Cannot remove HttpServletRequest HeaderValues");
}
protected Enumeration getAttributeNames()
{
return _httpServletRequest.getHeaderNames();
}
private String[] toArray(Enumeration e)
{
List ret = new ArrayList();
while (e.hasMoreElements())
{
ret.add(e.nextElement());
}
return (String[]) ret.toArray(new String[ret.size()]);
}
}