|
1 package com.tonbeller.wcf.param;
2
3 import java.io.IOException  ;
4
5 import javax.servlet.jsp.JspException ;
6 import javax.servlet.jsp.JspWriter ;
7 import javax.servlet.jsp.tagext.TagSupport ;
8
9 import org.apache.log4j.Logger;
10
11 import com.tonbeller.wcf.expr.ExprUtils;
12
13
19 public class ParamSqlTag extends TagSupport {
20 String paramName;
21 String qname;
22 SqlGenerator sg;
23 private static Logger logger = Logger.getLogger(ParamSqlTag.class);
24
25 public int doStartTag() throws JspException {
26 sg = createSqlGenerator();
27 if (qname != null)
28 sg.getColumnMap().put(SqlGenerator.DEFAULT_COLUMN_ID, qname);
29 return EVAL_BODY_INCLUDE;
30 }
31
32 public void setMapping(String columnId, String qname) {
33 sg.getColumnMap().put(columnId, qname);
34 }
35
36 public int doEndTag() throws JspException {
37 if (ExprUtils.isExpression(paramName)) {
38 Object obj = ExprUtils.getModelReference(pageContext, paramName);
39 paramName = String.valueOf(obj);
40 }
41
42 SessionParam param = SessionParamPool.instance(pageContext).getParam(paramName);
43 if (param == null)
44 throw new JspException ("SessionParam " + paramName + " not found");
45 SqlExpr ex = param.getSqlExpr();
46 JspWriter out = pageContext.getOut();
47 try {
48 out.print(sg.generate(ex));
49 } catch (IOException e) {
50 logger.error(null, e);
51 }
52 return EVAL_PAGE;
53 }
54
55
58 protected SqlGenerator createSqlGenerator() {
59 return new SqlGenerator();
60 }
61 public void setQname(String qname) {
62 this.qname = qname;
63 }
64 public void setParam(String paramName) {
65 this.paramName = paramName;
66 }
67 }
68 |
Popular Tags |
Java API By Example, From Geeks To Geeks.