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1
13 package com.tonbeller.jpivot.param;
14
15 import javax.servlet.jsp.JspException  ;
16 import javax.servlet.jsp.tagext.TagSupport ;
17
18 import com.tonbeller.jpivot.olap.model.Expression;
19 import com.tonbeller.jpivot.olap.model.OlapModel;
20 import com.tonbeller.jpivot.olap.navi.ExpressionParser;
21 import com.tonbeller.jpivot.olap.navi.SetParameter;
22 import com.tonbeller.jpivot.olap.navi.ExpressionParser.InvalidSyntaxException;
23 import com.tonbeller.wcf.expr.ExprUtils;
24 import com.tonbeller.wcf.param.SessionParam;
25 import com.tonbeller.wcf.param.SessionParamPool;
26
27
34 public class SetParameterTag extends TagSupport {
35 String httpParam;
36 String mdxParam;
37 String sessionParam;
38 String query;
39
40 public int doStartTag() throws JspException {
41 if ((httpParam == null) == (sessionParam == null))
42 throw new JspException ("either httpParam or sessionParam required");
43
44 if (httpParam != null)
45 return doStartTagHttp();
46 return doStartTagSession();
47 }
48
49 public int doStartTagSession() throws JspException {
50 return SKIP_BODY;
51 }
52
53 public int doStartTagHttp() throws JspException {
54 String value = pageContext.getRequest().getParameter(httpParam);
55 if (value != null)
56 return EVAL_BODY_INCLUDE;
57 return SKIP_BODY;
58 }
59
60 public int doEndTag() throws JspException {
61 if (httpParam != null)
62 return doEndTagHttp();
63 return doEndTagSession();
64 }
65
66 public int doEndTagSession() throws JspException {
67 SessionParamPool pool = SessionParamPool.instance(pageContext.getSession());
68 SessionParam p = pool.getParam(sessionParam);
69 if (p != null)
70 setQueryParam(p.getMdxValue());
71 return super.doEndTag();
72 }
73
74 public int doEndTagHttp() throws JspException {
75 String value = pageContext.getRequest().getParameter(httpParam);
76 if (value != null)
77 setQueryParam(value);
78 return super.doEndTag();
79 }
80
81 private void setQueryParam(String value) throws JspException {
82 OlapModel model = (OlapModel) ExprUtils.getModelReference(pageContext, query);
84 if (model == null)
85 throw new JspException ("OlapModel/Query " + query + " not found");
86 SetParameter setter = (SetParameter) model.getExtension(SetParameter.ID);
87 if (setter == null)
88 throw new JspException ("SetParameter not supported");
89 ExpressionParser parser = (ExpressionParser) model.getExtension(ExpressionParser.ID);
90 if (parser == null)
91 throw new JspException ("ExpressionParser not supported");
92 try {
93 Expression expr = parser.parse(value);
94 setter.setParameter(mdxParam, expr);
95 } catch (InvalidSyntaxException e) {
96 throw new JspException (e);
97 }
98 }
99
100 public void setHttpParam(String string) {
101 httpParam = string;
102 }
103
104 public void setMdxParam(String string) {
105 mdxParam = string;
106 }
107
108 public void setQuery(String string) {
109 query = string;
110 }
111
112 public void setSessionParam(String sessionParam) {
113 this.sessionParam = sessionParam;
114 }
115 } |
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