/*
* RequestInfo.java
*
* Version: $Revision: 3705 $
*
* Date: $Date: 2009-04-11 17:02:24 +0000 (Sat, 11 Apr 2009) $
*
* Copyright (c) 2002-2005, Hewlett-Packard Company and Massachusetts
* Institute of Technology. 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 the Hewlett-Packard Company nor the name of the
* Massachusetts Institute of Technology nor the names of their
* 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
* HOLDERS 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.dspace.app.webui.util;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.io.Serializable;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
/**
* Stores information about an HTTP request. This is used so that the request
* can be replicated during a later request, once authentication has
* successfully occurred.
*
* Note: Implements Serializable as it will be saved to the current session during submission.
* Please ensure that nothing is added to this class that isn't also serializable
*
* @author Robert Tansley
* @version $Revision: 3705 $
*/
public class RequestInfo implements Serializable
{
/** The original parameters */
private Map originalParameterMap;
/** The original method */
private String originalMethod;
/** The original query */
private String originalQueryString;
/**
* Construct a request info object storing information about the given
* request
*
* @param request
* the request to get information from
*/
public RequestInfo(HttpServletRequest request)
{
originalParameterMap = new HashMap(request.getParameterMap());
originalMethod = request.getMethod();
originalQueryString = request.getQueryString();
}
/**
* Wrap an incoming request to make it look like the request that the
* constructor was called with
*
* @param request
* the request to wrap
*
* @return a wrapper around the request passed into this method, wrapped so
* that it looks like the request passed into the constructor
*/
public HttpServletRequest wrapRequest(HttpServletRequest request)
{
return new MyWrapper(request);
}
/**
* Our own flavour of HTTP request wrapper, that uses information from= this
* RequestInfo object
*/
class MyWrapper extends HttpServletRequestWrapper
{
public MyWrapper(HttpServletRequest request)
{
super(request);
}
// ====== Methods below here are the wrapped methods ======
public String getParameter(String name)
{
String[] vals = (String[]) originalParameterMap.get(name);
if (vals == null)
{
// Delegate to wrapped object
// FIXME: This is possibly a bug in Tomcat
return super.getParameter(name);
}
else
{
return vals[0];
}
}
public Map getParameterMap()
{
return originalParameterMap;
}
public Enumeration getParameterNames()
{
Iterator i = originalParameterMap.keySet().iterator();
return new EnumIterator(i);
}
public String[] getParameterValues(String name)
{
return ((String[]) originalParameterMap.get(name));
}
public String getMethod()
{
return originalMethod;
}
public String getQueryString()
{
return originalQueryString;
}
/**
* This class converts an interator into an enumerator. This is done
* because we have the parameters as a Map (JDK 1.2 style), but for some
* weird reason the HttpServletRequest interface returns an Enumeration
* from getParameterNames() (JDK1.0 style.) JDK apparently offers no way
* of simply changing between the new styles.
*/
class EnumIterator implements Enumeration
{
private Iterator iterator;
public EnumIterator(Iterator i)
{
iterator = i;
}
public boolean hasMoreElements()
{
return iterator.hasNext();
}
public Object nextElement()
{
return iterator.next();
}
}
}
}