/*
* $Id: RestfulActionMapper.java 802942 2009-08-10 22:06:48Z musachy $
*
* 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.struts2.dispatcher.mapper;
import java.net.URLDecoder;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.StringTokenizer;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.RequestUtils;
import com.opensymphony.xwork2.config.ConfigurationManager;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
/**
* <!-- START SNIPPET: description -->
*
* A custom action mapper using the following format:
* <p/>
* <p/>
* <ul><tt>http://HOST/ACTION_NAME/PARAM_NAME1/PARAM_VALUE1/PARAM_NAME2/PARAM_VALUE2</tt></ul>
* <p/>
* You can have as many parameters you'd like to use. Alternatively the URL can be shortened to the following:
* <p/>
* <ul><tt>http://HOST/ACTION_NAME/PARAM_VALUE1/PARAM_NAME2/PARAM_VALUE2</tt></ul>
* <p/>
* This is the same as:
* <p/>
* <ul><tt>http://HOST/ACTION_NAME/ACTION_NAME + "Id"/PARAM_VALUE1/PARAM_NAME2/PARAM_VALUE2</tt></ul>
* <p/>
* Suppose for example we would like to display some articles by id at using the following URL sheme:
* <p/>
* <ul><tt>http://HOST/article/Id</tt></ul>
* <p/>
* <p/>
* Your action just needs a setArticleId() method, and requests such as /article/1, /article/2, etc will all map
* to that URL pattern.
*
* <!-- END SNIPPET: description -->
*
*/
public class RestfulActionMapper implements ActionMapper {
protected static final Logger LOG = LoggerFactory.getLogger(RestfulActionMapper.class);
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.mapper.ActionMapper#getMapping(javax.servlet.http.HttpServletRequest)
*/
public ActionMapping getMapping(HttpServletRequest request, ConfigurationManager configManager) {
String uri = RequestUtils.getServletPath(request);
int nextSlash = uri.indexOf('/', 1);
if (nextSlash == -1) {
return null;
}
String actionName = uri.substring(1, nextSlash);
Map<String, Object> parameters = new HashMap<String, Object>();
try {
StringTokenizer st = new StringTokenizer(uri.substring(nextSlash), "/");
boolean isNameTok = true;
String paramName = null;
String paramValue;
// check if we have the first parameter name
if ((st.countTokens() % 2) != 0) {
isNameTok = false;
paramName = actionName + "Id";
}
while (st.hasMoreTokens()) {
if (isNameTok) {
paramName = URLDecoder.decode(st.nextToken(), "UTF-8");
isNameTok = false;
} else {
paramValue = URLDecoder.decode(st.nextToken(), "UTF-8");
if ((paramName != null) && (paramName.length() > 0)) {
parameters.put(paramName, paramValue);
}
isNameTok = true;
}
}
} catch (Exception e) {
LOG.warn("Cannot determine url parameters", e);
}
return new ActionMapping(actionName, "", "", parameters);
}
public ActionMapping getMappingFromActionName(String actionName) {
return new ActionMapping(actionName, null, null, null);
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.mapper.ActionMapper#getUriFromActionMapping(org.apache.struts2.dispatcher.mapper.ActionMapping)
*/
public String getUriFromActionMapping(ActionMapping mapping) {
StringBuilder retVal = new StringBuilder();
retVal.append(mapping.getNamespace());
retVal.append(mapping.getName());
Object value = mapping.getParams().get(mapping.getName() + "Id");
if (value != null) {
retVal.append("/");
retVal.append(value);
}
return retVal.toString();
}
}
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