Source Code Cross Referenced for ElseIf.java in  » J2EE » webwork-2.2.6 » com » opensymphony » webwork » components » Java Source Code / Java DocumentationJava Source Code and Java Documentation

01:        package com.opensymphony.webwork.components;
02:
03:        import com.opensymphony.xwork.util.OgnlValueStack;
04:
05:        import java.io.Writer;
06:
07:        /**
08:         * <!-- START SNIPPET: javadoc -->
09:         *
10:         * <p>Perform basic condition flow. 'If' tag could be used by itself or with 'Else If' Tag and/or single/multiple 'Else'
11:         * Tag.</p>
12:         *
13:         * <!-- END SNIPPET: javadoc -->
14:         *
15:         *
16:         * <!-- START SNIPPET: params -->
17:         *
18:         * <ul>
19:         *
20:         * <li>test* (Boolean) - Logic to determined if body of tag is to be displayed</li>
21:         *
22:         * </ul>
23:         *
24:         * <!-- END SNIPPET: params -->
25:         *
26:         *
27:         * <pre>
28:         * <!-- START SNIPPET: example -->
29:         *  &lt;ww:if test="%{false}"&gt;
30:         * 	    &lt;div&gt;Will Not Be Executed&lt;/div&gt;
31:         *  &lt;/ww:if&gt;
32:         * 	&lt;ww:elseif test="%{true}"&gt;
33:         * 	    &lt;div&gt;Will Be Executed&lt;/div&gt;
34:         *  &lt;/ww:elseif&gt;
35:         *  &lt;ww:else&gt;
36:         * 	    &lt;div&gt;Will Not Be Executed&lt;/div&gt;
37:         *  &lt;/ww:else&gt;
38:         * <!-- END SNIPPET: example -->
39:         * </pre>
40:         *
41:         * @author Rick Salsa (rsal@mb.sympatico.ca)
42:         * @author tmjee
43:         * @ww.tag name="elseif" tld-body-content="JSP" description="Elseif tag"  tld-tag-class="com.opensymphony.webwork.views.jsp.ElseIfTag"
44:         */
45:        public class ElseIf extends Component {
46:            public ElseIf(OgnlValueStack stack) {
47:                super (stack);
48:            }
49:
50:            protected Boolean answer;
51:            protected String test;
52:
53:            public boolean start(Writer writer) {
54:                Boolean ifResult = (Boolean) stack.getContext().get(If.ANSWER);
55:
56:                if ((ifResult == null) || (ifResult.booleanValue())) {
57:                    return false;
58:                }
59:
60:                //make the comparision
61:                answer = (Boolean) findValue(test, Boolean.class);
62:
63:                if (answer == null) {
64:                    answer = Boolean.FALSE;
65:                }
66:
67:                if (answer.booleanValue()) {
68:                    stack.getContext().put(If.ANSWER, answer);
69:                }
70:
71:                return answer != null && answer.booleanValue();
72:            }
73:
74:            public boolean end(Writer writer, String body) {
75:                if (answer == null) {
76:                    answer = Boolean.FALSE;
77:                }
78:
79:                if (answer.booleanValue()) {
80:                    stack.getContext().put(If.ANSWER, answer);
81:                }
82:                return super .end(writer, "");
83:            }
84:
85:            /**
86:             * Expression to determine if body of tag is to be displayed
87:             * @ww.tagattribute required="true" type="Boolean"
88:             */
89:            public void setTest(String test) {
90:                this.test = test;
91:            }
92:        }