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


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