/*
* $Id: RequestToVariableFilter.java 471754 2006-11-06 14:55:09Z husted $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.struts.scripting;
// util imports:
import java.util.Enumeration;
import java.util.Properties;
// logging imports:
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
// misc imports:
import javax.servlet.http.HttpServletRequest;
import org.apache.bsf.BSFException;
import org.apache.bsf.BSFManager;
/**
* Takes request parameters and declares variables with them. If a variable is
* already exists with that name, a "_" is prepended to the name. Both Strings
* and arrays are recognized.
*/
public class RequestToVariableFilter implements BSFManagerFilter {
/** The logging instance. */
private static final Log LOG = LogFactory.getLog(TestFilter.class);
/**
* Initializes the filter.
*
*@param name The name of the filter
*@param props The properties
*/
public void init(String name, Properties props) { }
/**
* Applies the filter.
*
*@param mgr The bsf manager
*@return The bsf manager
*/
public BSFManager apply(BSFManager mgr) {
HttpServletRequest request =
(HttpServletRequest) mgr.lookupBean("request");
String[] values = null;
String name = null;
String newName = null;
Object o = null;
for (Enumeration e = request.getParameterNames();
e.hasMoreElements();) {
name = (String) e.nextElement();
o = mgr.lookupBean(name);
if (o == null) {
newName = name;
} else {
newName = "_" + name;
}
values = request.getParameterValues(name);
try {
if (values.length > 1) {
mgr.declareBean(newName, values, values.getClass());
if (LOG.isDebugEnabled()) {
LOG.debug("creating array var " + newName);
}
} else {
mgr.declareBean(newName, values[0], String.class);
if (LOG.isDebugEnabled()) {
LOG.debug("creating string var " + newName);
}
}
} catch (BSFException ex) {
LOG.warn("Unable to set variable " + newName, ex);
}
}
if (LOG.isDebugEnabled()) {
LOG.debug("Done filtering");
}
return mgr;
}
}