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


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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.BaseFieldTag;
72 import org.apache.struts.taglib.html.Constants;
73 import org.apache.struts.util.ResponseUtils;
74
75 import javax.servlet.jsp.JspException JavaDoc;
76
77
78 /**
79  * Extension of the Convenience base class for the various input tags for text fields.
80  * This class simply extends BaseFieldTag in order to override the area of code that extracts the value from the form bean.
81  * Instead of doing this, we get the info from the Input object in the current ControllerRequest instead
82  *
83  * @author Michael P. Nash
84  */
85 public abstract class ExBaseFieldTag
86         extends BaseFieldTag {
87     private String JavaDoc name = null;
88
89     public void setName(String JavaDoc newName) {
90         name = newName;
91     }
92
93     public String JavaDoc getName() {
94         return name;
95     }
96     // --------------------------------------------------------- Public Methods
97 /**
98      * Generate the required input tag.
99      *
100      * @return integer as defined in the standard tag library framework.
101      * @throws JspException if a JSP exception has occurred
102      */
103     public int doStartTag()
104             throws JspException JavaDoc {
105         try {
106             String JavaDoc nameToUse = name;
107             String JavaDoc propertyToUse = property;
108             Input myInput = null;
109
110             if (StringUtil.notNull(nameToUse).equals(Constants.BEAN_KEY)) {
111                 nameToUse = null;
112             }
113             if (nameToUse == null) {
114                 myInput = ControllerUtils.findInput(pageContext, propertyToUse);
115             } else {
116                 ControllerElement ce = ControllerUtils.findElement(pageContext,
117                         nameToUse,
118                         propertyToUse);
119
120                 if (ce instanceof Input) {
121                     myInput = (Input) ce;
122                 } else {
123                     throw new JspException JavaDoc("Element '" +
124                             StringUtil.notNull(propertyToUse) +
125                             "' in bean '" +
126                             StringUtil.notNull(nameToUse) +
127                             "' is not an Input - it is a '" +
128                             ce.getClass().getName() + "'");
129                 }
130             }
131
132             // Create an appropriate "input" element based on our parameters
133 StringBuffer JavaDoc results = new StringBuffer JavaDoc("<input type=\"");
134             results.append(type);
135             results.append("\" name=\"");
136             results.append(myInput.getName());
137             results.append("\"");
138
139             if (accesskey != null) {
140                 results.append(" accesskey=\"");
141                 results.append(accesskey);
142                 results.append("\"");
143             }
144             if (accept != null) {
145                 results.append(" accept=\"");
146                 results.append(accept);
147                 results.append("\"");
148             }
149
150             String JavaDoc maxToUse = maxlength;
151
152             if (maxToUse == null) {
153                 maxToUse = "" + myInput.getMaxLength();
154             }
155             if (maxToUse != null) {
156                 results.append(" maxlength=\"");
157                 results.append(maxToUse);
158                 results.append("\"");
159             }
160
161             String JavaDoc colsToUse = cols;
162
163             if (colsToUse == null) {
164                 colsToUse = "" + myInput.getDisplayLength();
165             }
166             if (colsToUse != null) {
167                 results.append(" size=\"");
168                 results.append(colsToUse);
169                 results.append("\"");
170             }
171             if (tabindex != null) {
172                 results.append(" tabindex=\"");
173                 results.append(tabindex);
174                 results.append("\"");
175             }
176
177             results.append(" value=\"");
178
179             if (value != null) {
180                 results.append(value);
181             } else if (redisplay || !"password".equals(type)) {
182                 Object JavaDoc value = myInput.getDefaultValue();
183
184                 if (value == null) {
185                     value = "";
186                 }
187
188                 results.append(value.toString());
189             }
190
191             value = null;
192             results.append("\"");
193             results.append(prepareEventHandlers());
194             results.append(prepareStyles());
195             results.append(">");
196
197             // Print this field to our output writer
198 ResponseUtils.write(pageContext, results.toString());
199         } catch (NullPointerException JavaDoc ex) {
200             ex.printStackTrace();
201             //
202 //Orion.jar compatability change. Orion doesn't implement
203 //new JspException(String, Throwable)
204 //
205 throw new JspException JavaDoc("BaseFieldTag.startTag(): " + ex.getMessage());
206         }
207
208         // Continue processing this page
209 // return (EVAL_BODY_TAG);
210 return (EVAL_BODY_BUFFERED);
211     }
212 }
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