1 /*
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 1999 The Apache Software Foundation. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution, if
20 * any, must include the following acknowlegement:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowlegement may appear in the software itself,
24 * if and wherever such third-party acknowlegements normally appear.
25 *
26 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
27 * Foundation" must not be used to endorse or promote products derived
28 * from this software without prior written permission. For written
29 * permission, please contact apache@apache.org.
30 *
31 * 5. Products derived from this software may not be called "Apache"
32 * nor may "Apache" appear in their names without prior written
33 * permission of the Apache Group.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 * ====================================================================
48 *
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>.
53 *
54 */
55 package org.apache.commons.jelly.tags.sql;
56
57 import java.util.*;
58 import javax.servlet.jsp.jstl.sql.SQLExecutionTag;
59
60 import org.apache.commons.jelly.JellyContext;
61 import org.apache.commons.jelly.JellyException;
62 import org.apache.commons.jelly.TagSupport;
63 import org.apache.commons.jelly.XMLOutput;
64 import org.apache.commons.jelly.tags.Resources;
65
66 /***
67 * <p>Tag handler for <Param> in JSTL, used to set
68 * parameter values for a SQL statement.</p>
69 *
70 * @author Hans Bergsten
71 */
72
73 public class ParamTag extends TagSupport {
74 protected Object value;
75
76
77 public void setValue(Object value) {
78 this.value = value;
79 }
80
81 //**********************************************************************
82 // Tag logic
83
84 public void doTag(XMLOutput output) throws Exception {
85 SQLExecutionTag parent =
86 (SQLExecutionTag) findAncestorWithClass(this, SQLExecutionTag.class);
87 if (parent == null) {
88 throw new JellyException(Resources.getMessage("SQL_PARAM_OUTSIDE_PARENT"));
89 }
90
91 Object paramValue = value;
92 if (value != null) {
93 paramValue = value;
94 }
95 else {
96 String bodyContent = getBodyText();
97 if (bodyContent != null) {
98 bodyContent = bodyContent.trim();
99 if (bodyContent.length() > 0) {
100 paramValue = bodyContent;
101 }
102 }
103 }
104
105 parent.addSQLParameter(paramValue);
106 }
107 }
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