/*
* $Id: TagUtils.java 670170 2008-06-21 09:40:34Z hermanns $
*
* 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.views.jsp;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.PageContext;
import org.apache.struts2.RequestUtils;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.dispatcher.ApplicationMap;
import org.apache.struts2.dispatcher.Dispatcher;
import org.apache.struts2.dispatcher.RequestMap;
import org.apache.struts2.dispatcher.SessionMap;
import org.apache.struts2.dispatcher.mapper.ActionMapper;
import org.apache.struts2.dispatcher.mapper.ActionMapping;
import org.apache.struts2.util.AttributeMap;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.config.ConfigurationException;
import com.opensymphony.xwork2.util.ValueStack;
import com.opensymphony.xwork2.util.ValueStackFactory;
/**
*/
public class TagUtils {
public static ValueStack getStack(PageContext pageContext) {
HttpServletRequest req = (HttpServletRequest) pageContext.getRequest();
ValueStack stack = (ValueStack) req.getAttribute(ServletActionContext.STRUTS_VALUESTACK_KEY);
if (stack == null) {
HttpServletResponse res = (HttpServletResponse) pageContext.getResponse();
Dispatcher du = Dispatcher.getInstance();
if (du == null) {
throw new ConfigurationException("The Struts dispatcher cannot be found. This is usually caused by "+
"using Struts tags without the associated filter. Struts tags are only usable when the request "+
"has passed through its servlet filter, which initializes the Struts dispatcher needed for this tag.");
}
stack = du.getContainer().getInstance(ValueStackFactory.class).createValueStack();
Map<String, Object> extraContext = du.createContextMap(new RequestMap(req),
req.getParameterMap(),
new SessionMap(req),
new ApplicationMap(pageContext.getServletContext()),
req,
res,
pageContext.getServletContext());
extraContext.put(ServletActionContext.PAGE_CONTEXT, pageContext);
stack.getContext().putAll(extraContext);
req.setAttribute(ServletActionContext.STRUTS_VALUESTACK_KEY, stack);
// also tie this stack/context to the ThreadLocal
ActionContext.setContext(new ActionContext(stack.getContext()));
} else {
// let's make sure that the current page context is in the action context
Map<String, Object> context = stack.getContext();
context.put(ServletActionContext.PAGE_CONTEXT, pageContext);
AttributeMap attrMap = new AttributeMap(context);
context.put("attr", attrMap);
}
return stack;
}
public static String buildNamespace(ActionMapper mapper, ValueStack stack, HttpServletRequest request) {
ActionContext context = new ActionContext(stack.getContext());
ActionInvocation invocation = context.getActionInvocation();
if (invocation == null) {
ActionMapping mapping = mapper.getMapping(request,
Dispatcher.getInstance().getConfigurationManager());
if (mapping != null) {
return mapping.getNamespace();
} else {
// well, if the ActionMapper can't tell us, and there is no existing action invocation,
// let's just go with a default guess that the namespace is the last the path minus the
// last part (/foo/bar/baz.xyz -> /foo/bar)
String path = RequestUtils.getServletPath(request);
return path.substring(0, path.lastIndexOf("/"));
}
} else {
return invocation.getProxy().getNamespace();
}
}
}
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