/**
* Licensed under the Artistic License; you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://displaytag.sourceforge.net/license.html
*
* THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
package org.displaytag.util;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.ObjectUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.UnhandledException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.displaytag.Messages;
/**
* Default RequestHelper implementation.
* @author Fabrizio Giustina
* @version $Revision: 1104 $ ($Author: fgiust $)
* @see org.displaytag.util.Href
* @see org.displaytag.util.RequestHelper
*/
public class DefaultRequestHelper implements RequestHelper
{
/**
* logger.
*/
private static Log log = LogFactory.getLog(DefaultRequestHelper.class);
/**
* original HttpServletRequest.
*/
private HttpServletRequest request;
/**
* original HttpServletResponse.
*/
private HttpServletResponse response;
/**
* Construct a new RequestHelper for the given request.
* @param servletRequest HttpServletRequest needed to generate the base href
* @param servletResponse HttpServletResponse needed to encode generated urls
*/
public DefaultRequestHelper(HttpServletRequest servletRequest, HttpServletResponse servletResponse)
{
this.request = servletRequest;
this.response = servletResponse;
}
/**
* @see org.displaytag.util.RequestHelper#getHref()
*/
public Href getHref()
{
String requestURI = this.request.getRequestURI();
// call encodeURL to preserve session id when cookies are disabled
Href href = new DefaultHref(this.response.encodeURL(requestURI));
href.setParameterMap(getParameterMap());
return href;
}
/**
* @see org.displaytag.util.RequestHelper#getParameter(java.lang.String)
*/
public String getParameter(String key)
{
// actually simply return the parameter, this behaviour could be changed
return this.request.getParameter(key);
}
/**
* @see org.displaytag.util.RequestHelper#getIntParameter(java.lang.String)
*/
public Integer getIntParameter(String key)
{
String value = this.request.getParameter(key);
if (value != null)
{
try
{
return new Integer(value);
}
catch (NumberFormatException e)
{
// It's ok to ignore, simply return null
log.debug(Messages.getString("RequestHelper.invalidparameter", //$NON-NLS-1$
new Object[]{key, value}));
}
}
return null;
}
/**
* @see org.displaytag.util.RequestHelper#getParameterMap()
*/
public Map getParameterMap()
{
Map map = new HashMap();
// get the parameters names
Enumeration parametersName = this.request.getParameterNames();
while (parametersName.hasMoreElements())
{
// ... get the value
String paramName = (String) parametersName.nextElement();
request.getParameter(paramName);
// put key/value in the map
String[] originalValues = (String[]) ObjectUtils.defaultIfNull(
this.request.getParameterValues(paramName),
new String[0]);
String[] values = new String[originalValues.length];
for (int i = 0; i < values.length; i++)
{
try
{
values[i] = URLEncoder.encode(StringUtils.defaultString(originalValues[i]), StringUtils
.defaultString(response.getCharacterEncoding(), "UTF8")); //$NON-NLS-1$
}
catch (UnsupportedEncodingException e)
{
throw new UnhandledException(e);
}
}
map.put(paramName, values);
}
// return the Map
return map;
}
}