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Java > Open Source Codes > com > jcorporate > expresso > ext > struts > taglib > html > ExCheckboxTag


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64
65 package com.jcorporate.expresso.ext.struts.taglib.html;
66
67 import com.jcorporate.expresso.core.controller.ControllerElement;
68 import com.jcorporate.expresso.core.controller.Input;
69 import com.jcorporate.expresso.core.misc.StringUtil;
70 import com.jcorporate.expresso.ext.struts.taglib.ControllerUtils;
71 import org.apache.struts.taglib.html.CheckboxTag;
72 import org.apache.struts.util.ResponseUtils;
73
74 import javax.servlet.jsp.JspException JavaDoc;
75
76
77 /**
78  * Tag for input fields of type "checkbox".
79  *
80  * @author Craig R. McClanahan
81  * @version $Revision: 1.11 $ $Date: 2004/11/17 20:48:16 $
82  */
83 public class ExCheckboxTag
84         extends CheckboxTag {
85     // --------------------------------------------------------- Public Methods
86 /**
87      * Generate the required input tag.
88      *
89      * @return integer as defined in the standard tag library framework.
90      * @throws JspException if a JSP exception has occurred
91      */
92     public int doStartTag()
93             throws JspException JavaDoc {
94         Input myInput = null;
95         String JavaDoc nameToUse = name;
96         String JavaDoc propertyToUse = property;
97
98         if (StringUtil.notNull(nameToUse).equals("org.apache.struts.taglib.html.BEAN")) {
99             nameToUse = null;
100         }
101         if (nameToUse == null) {
102             myInput = ControllerUtils.findInput(pageContext, propertyToUse);
103         } else {
104             ControllerElement ce = ControllerUtils.findElement(pageContext,
105                     nameToUse,
106                     propertyToUse);
107
108             if (ce == null) {
109                 throw new JspException JavaDoc("No such element as '" +
110                         StringUtil.notNull(propertyToUse) +
111                         "' in element '" +
112                         StringUtil.notNull(nameToUse) + "'");
113             }
114             if (ce instanceof Input) {
115                 myInput = (Input) ce;
116             } else {
117                 throw new JspException JavaDoc("Element '" +
118                         StringUtil.notNull(propertyToUse) +
119                         "' in bean '" +
120                         StringUtil.notNull(nameToUse) +
121                         "' is not an Input - it is a '" +
122                         ce.getClass().getName() + "'");
123             }
124         }
125
126         // Create an appropriate "input" element based on our parameters
127 StringBuffer JavaDoc results = new StringBuffer JavaDoc("<input type=\"checkbox\"");
128         results.append(" name=\"");
129         results.append(myInput.getName());
130         results.append("\"");
131
132         if (accesskey != null) {
133             results.append(" accesskey=\"");
134             results.append(accesskey);
135             results.append("\"");
136         }
137         if (tabindex != null) {
138             results.append(" tabindex=\"");
139             results.append(tabindex);
140             results.append("\"");
141         }
142
143         results.append(" value=\"");
144
145         if (value == null) {
146             results.append("Y");
147         } else {
148             results.append(value);
149         }
150
151         results.append("\"");
152
153         String JavaDoc checked = myInput.getDefaultValue();
154
155         if (checked.equalsIgnoreCase("true") ||
156                 checked.equalsIgnoreCase("yes") ||
157                 checked.equalsIgnoreCase("on") || checked.equalsIgnoreCase("y") ||
158                 checked.equalsIgnoreCase(value)) {
159             results.append(" checked=\"checked\"");
160         }
161
162         results.append(prepareEventHandlers());
163         results.append(prepareStyles());
164         results.append(">");
165
166         // Print this field to our output writer
167 ResponseUtils.write(pageContext, results.toString());
168
169         // Continue processing this page
170 this.text = null;
171
172         return (EVAL_BODY_TAG);
173     }
174 }
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