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Java > Open Source Codes > com > caucho > jstl > rt > SqlParamTag


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.jstl.rt;
30
31 import com.caucho.jsp.PageContextImpl;
32 import com.caucho.util.L10N;
33
34 import javax.servlet.jsp.JspException JavaDoc;
35 import javax.servlet.jsp.jstl.sql.SQLExecutionTag;
36 import javax.servlet.jsp.tagext.BodyTagSupport JavaDoc;
37 import javax.servlet.jsp.tagext.Tag JavaDoc;
38
39 /**
40  * Looks up an i18n message from a bundle and prints it.
41  */
42 public class SqlParamTag extends BodyTagSupport JavaDoc {
43   private static L10N L = new L10N(SqlParamTag.class);
44   
45   private Object JavaDoc _value;
46   private boolean _hasValueSet;
47
48   /**
49    * Sets the value
50    *
51    * @param value the the value.
52    */
53   public void setValue(Object JavaDoc value)
54   {
55     _value = value;
56     _hasValueSet = true;
57   }
58
59   /**
60    * Process the tag.
61    */
62   public int doStartTag()
63     throws JspException JavaDoc
64   {
65     if (! _hasValueSet)
66       return EVAL_BODY_BUFFERED;
67
68     PageContextImpl pageContext = (PageContextImpl) this.pageContext;
69     
70     Object JavaDoc value = _value;
71
72     Tag parent = getParent();
73     for (;
74          parent != null && ! (parent instanceof SQLExecutionTag);
75          parent = parent.getParent()) {
76     }
77
78     if (parent == null)
79       throw new JspException JavaDoc(L.l("sql:param requires sql:query parent."));
80
81     SQLExecutionTag tag = (SQLExecutionTag) parent;
82
83     tag.addSQLParameter(value);
84     
85     return SKIP_BODY;
86   }
87
88   /**
89    * Process the tag.
90    */
91   public int doEndTag()
92     throws JspException JavaDoc
93   {
94     if (_hasValueSet)
95       return EVAL_PAGE;
96       
97     String JavaDoc value;
98
99     if (bodyContent != null)
100       value = bodyContent.getString().trim();
101     else
102       value = "";
103
104     Tag parent = getParent();
105     for (;
106      parent != null && ! (parent instanceof SQLExecutionTag);
107      parent = parent.getParent()) {
108     }
109
110     if (parent == null)
111       throw new JspException JavaDoc(L.l("sql:param requires sql:query parent."));
112
113     SQLExecutionTag tag = (SQLExecutionTag) parent;
114
115     tag.addSQLParameter(value);
116     
117     return EVAL_PAGE;
118   }
119 }
120
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