/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
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 $Revision$
*/
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();
}
}
}
}