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1
18 package org.apache.beehive.netui.script.el;
19
20 import javax.servlet.ServletRequest  ;
21 import javax.servlet.ServletResponse ;
22 import javax.servlet.http.HttpServletRequest ;
23 import javax.servlet.jsp.el.VariableResolver ;
24
25 import org.apache.beehive.netui.script.IllegalExpressionException;
26 import org.apache.beehive.netui.script.common.ImplicitObjectUtil;
27 import org.apache.beehive.netui.script.el.util.RequestAttributeMap;
28 import org.apache.beehive.netui.script.el.util.SessionAttributeMap;
29 import org.apache.beehive.netui.util.logging.Logger;
30 import org.apache.beehive.netui.pageflow.SharedFlowController;
31 import org.apache.beehive.netui.pageflow.PageFlowController;
32 import org.apache.beehive.netui.pageflow.GlobalApp;
33
34 import java.util.Map ;
35
36
39 public class NetUIUpdateVariableResolver
40 extends NetUIVariableResolver {
41
42 private static final Logger LOGGER = Logger.getInstance(NetUIVariableResolver.class);
43
44 private boolean _requestParameter = true;
45 private Object _form = null;
46 private ServletRequest _request = null;
47 private ServletResponse _response = null;
48
49 public NetUIUpdateVariableResolver(Object form, ServletRequest request, ServletResponse response, boolean requestParameter) {
50 super();
51
52 _requestParameter = requestParameter;
53 _form = form;
54 _request = request;
55 _response = response;
56 }
57
58 public Object resolveVariable(String name) {
59 if(name.equals("actionForm"))
60 return _form;
61 else if(name.equals("pageFlow"))
62 return getPageFlow(_request, _response);
63 else if(name.equals("globalApp"))
64 return getGlobalApp(_request, _response);
65 else if(name.equals("sharedFlow"))
66 return getSharedFlow(_request, _response);
67 else if(name.equals("requestScope")) {
68 if(_requestParameter == false)
69 return new RequestAttributeMap(_request);
70 else
71 throw new IllegalExpressionException("The request data binding context can not be updated from a request parameter.");
72 } else if(name.equals("sessionScope")) {
73 if(_requestParameter == false)
74 return new SessionAttributeMap(((HttpServletRequest )_request).getSession());
75 else
76 throw new IllegalExpressionException("The session data binding context can not be updated from a request parameter.");
77 }
78 else if(name.equals("applicationScope")) {
80 if(_requestParameter == false)
81 return null;
82 else
83 throw new IllegalExpressionException("The application data binding context can not be updated from a request parameter.");
84 } else {
85 String msg = "Could not resolve variable named \"" + name + "\" for an expression update.";
86 if(LOGGER.isErrorEnabled())
87 LOGGER.error(msg);
88
89 throw new IllegalExpressionException(msg);
90 }
91 }
92
93 public String [] getAvailableVariables() {
94 if(_requestParameter)
95 return new String []{"actionForm", "pageFlow", "globalApp"};
96 else
97 return new String []{"actionForm", "pageFlow", "globalApp", "request", "session", "application"};
98 }
99
100 private static final Map getSharedFlow(ServletRequest request, ServletResponse response) {
101 return ImplicitObjectUtil.getSharedFlow(request);
102 }
103
104 private static final PageFlowController getPageFlow(ServletRequest request, ServletResponse response) {
105 return ImplicitObjectUtil.getPageFlow(request, response);
106 }
107
108 private static final GlobalApp getGlobalApp(ServletRequest request, ServletResponse response) {
109 return ImplicitObjectUtil.getGlobalApp(request, response);
110 }
111 }
112 |
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