ELInsertTag


1   /*
2    * $Id: ELInsertTag.java 54933 2004-10-16 17:04:52Z germuska $ 
3    *
4    * Copyright 1999-2004 The Apache Software Foundation.
5    * 
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    * 
10   *      http://www.apache.org/licenses/LICENSE-2.0
11   * 
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.strutsel.taglib.tiles;
20  
21  import org.apache.struts.taglib.tiles.InsertTag;
22  import javax.servlet.jsp.JspException  ;
23  import org.apache.strutsel.taglib.utils.EvalHelper;
24  
25  /**
26   * This is the tag handler for &lt;tiles:insert&gt;, which includes
27   * a template. The tag's body content consists of &lt;tiles:put&gt;
28   * tags, which are accessed by &lt;tiles:get&gt; in the template.
29   *<p>
30   * This class is a subclass of the class
31   * <code>org.apache.struts.taglib.tiles.InsertTag</code> which provides most of
32   * the described functionality.  This subclass allows all attribute values to
33   * be specified as expressions utilizing the JavaServer Pages Standard Library
34   * expression language.
35   *
36   * @version $Rev: 54933 $
37   */
38  public class ELInsertTag extends InsertTag {
39  
40      /**
41       * Instance variable mapped to "template" tag attribute.
42       * (Mapping set in associated BeanInfo class.)
43       */
44      private String   templateExpr;
45      /**
46       * Instance variable mapped to "component" tag attribute.
47       * (Mapping set in associated BeanInfo class.)
48       */
49      private String   componentExpr;
50      /**
51       * Instance variable mapped to "page" tag attribute.
52       * (Mapping set in associated BeanInfo class.)
53       */
54      private String   pageExpr;
55      /**
56       * Instance variable mapped to "definition" tag attribute.
57       * (Mapping set in associated BeanInfo class.)
58       */
59      private String   definitionExpr;
60      /**
61       * Instance variable mapped to "attribute" tag attribute.
62       * (Mapping set in associated BeanInfo class.)
63       */
64      private String   attributeExpr;
65      /**
66       * Instance variable mapped to "name" tag attribute.
67       * (Mapping set in associated BeanInfo class.)
68       */
69      private String   nameExpr;
70      /**
71       * Instance variable mapped to "beanName" tag attribute.
72       * (Mapping set in associated BeanInfo class.)
73       */
74      private String   beanNameExpr;
75      /**
76       * Instance variable mapped to "beanProperty" tag attribute.
77       * (Mapping set in associated BeanInfo class.)
78       */
79      private String   beanPropertyExpr;
80      /**
81       * Instance variable mapped to "beanScope" tag attribute.
82       * (Mapping set in associated BeanInfo class.)
83       */
84      private String   beanScopeExpr;
85      /**
86       * Instance variable mapped to "flush" tag attribute.
87       * (Mapping set in associated BeanInfo class.)
88       */
89      private String   flushExpr;
90      /**
91       * (Mapping set in associated BeanInfo class.)
92       * Instance variable mapped to "ignore" tag attribute.
93       */
94      private String   ignoreExpr;
95      /**
96       * Instance variable mapped to "role" tag attribute.
97       * (Mapping set in associated BeanInfo class.)
98       */
99      private String   roleExpr;
100     /**
101      * Instance variable mapped to "controllerUrl" tag attribute.
102      * (Mapping set in associated BeanInfo class.)
103      */
104     private String   controllerUrlExpr;
105     /**
106      * Instance variable mapped to "controllerClass" tag attribute.
107      * (Mapping set in associated BeanInfo class.)
108      */
109     private String   controllerClassExpr;
110 
111     /**
112      * Getter method for "template" tag attribute.
113      * (Mapping set in associated BeanInfo class.)
114      */
115     public String   getTemplateExpr() { return (templateExpr); }
116     /**
117      * Getter method for "component" tag attribute.
118      * (Mapping set in associated BeanInfo class.)
119      */
120     public String   getComponentExpr() { return (componentExpr); }
121     /**
122      * Getter method for "page" tag attribute.
123      * (Mapping set in associated BeanInfo class.)
124      */
125     public String   getPageExpr() { return (pageExpr); }
126     /**
127      * Getter method for "definition" tag attribute.
128      * (Mapping set in associated BeanInfo class.)
129      */
130     public String   getDefinitionExpr() { return (definitionExpr); }
131     /**
132      * Getter method for "attribute" tag attribute.
133      * (Mapping set in associated BeanInfo class.)
134      */
135     public String   getAttributeExpr() { return (attributeExpr); }
136     /**
137      * Getter method for "name" tag attribute.
138      * (Mapping set in associated BeanInfo class.)
139      */
140     public String   getNameExpr() { return (nameExpr); }
141     /**
142      * Getter method for "beanName" tag attribute.
143      * (Mapping set in associated BeanInfo class.)
144      */
145     public String   getBeanNameExpr() { return (beanNameExpr); }
146     /**
147      * Getter method for "beanProperty" tag attribute.
148      * (Mapping set in associated BeanInfo class.)
149      */
150     public String   getBeanPropertyExpr() { return (beanPropertyExpr); }
151     /**
152      * Getter method for "beanScope" tag attribute.
153      * (Mapping set in associated BeanInfo class.)
154      */
155     public String   getBeanScopeExpr() { return (beanScopeExpr); }
156     /**
157      * Getter method for "flush" tag attribute.
158      * (Mapping set in associated BeanInfo class.)
159      */
160     public String   getFlushExpr() { return (flushExpr); }
161     /**
162      * Getter method for "ignore" tag attribute.
163      * (Mapping set in associated BeanInfo class.)
164      */
165     public String   getIgnoreExpr() { return (ignoreExpr); }
166     /**
167      * Getter method for "role" tag attribute.
168      * (Mapping set in associated BeanInfo class.)
169      */
170     public String   getRoleExpr() { return (roleExpr); }
171     /**
172      * Getter method for "controllerUrl" tag attribute.
173      * (Mapping set in associated BeanInfo class.)
174      */
175     public String   getControllerUrlExpr() { return (controllerUrlExpr); }
176     /**
177      * Getter method for "controllerClass" tag attribute.
178      * (Mapping set in associated BeanInfo class.)
179      */
180     public String   getControllerClassExpr() { return (controllerClassExpr); }
181 
182     /**
183      * Setter method for "template" tag attribute.
184      * (Mapping set in associated BeanInfo class.)
185      */
186     public void setTemplateExpr(String   templateExpr) { this.templateExpr = templateExpr; }
187     /**
188      * Setter method for "component" tag attribute.
189      * (Mapping set in associated BeanInfo class.)
190      */
191     public void setComponentExpr(String   componentExpr) { this.componentExpr = componentExpr; }
192     /**
193      * Setter method for "page" tag attribute.
194      * (Mapping set in associated BeanInfo class.)
195      */
196     public void setPageExpr(String   pageExpr) { this.pageExpr = pageExpr; }
197     /**
198      * Setter method for "definition" tag attribute.
199      * (Mapping set in associated BeanInfo class.)
200      */
201     public void setDefinitionExpr(String   definitionExpr) { this.definitionExpr = definitionExpr; }
202     /**
203      * Setter method for "attribute" tag attribute.
204      * (Mapping set in associated BeanInfo class.)
205      */
206     public void setAttributeExpr(String   attributeExpr) { this.attributeExpr = attributeExpr; }
207     /**
208      * Setter method for "name" tag attribute.
209      * (Mapping set in associated BeanInfo class.)
210      */
211     public void setNameExpr(String   nameExpr) { this.nameExpr = nameExpr; }
212     /**
213      * Setter method for "beanName" tag attribute.
214      * (Mapping set in associated BeanInfo class.)
215      */
216     public void setBeanNameExpr(String   beanNameExpr) { this.beanNameExpr = beanNameExpr; }
217     /**
218      * Setter method for "beanProperty" tag attribute.
219      * (Mapping set in associated BeanInfo class.)
220      */
221     public void setBeanPropertyExpr(String   beanPropertyExpr) { this.beanPropertyExpr = beanPropertyExpr; }
222     /**
223      * Setter method for "beanScope" tag attribute.
224      * (Mapping set in associated BeanInfo class.)
225      */
226     public void setBeanScopeExpr(String   beanScopeExpr) { this.beanScopeExpr = beanScopeExpr; }
227     /**
228      * Setter method for "flush" tag attribute.
229      * (Mapping set in associated BeanInfo class.)
230      */
231     public void setFlushExpr(String   flushExpr) { this.flushExpr = flushExpr; }
232     /**
233      * Setter method for "ignore" tag attribute.
234      * (Mapping set in associated BeanInfo class.)
235      */
236     public void setIgnoreExpr(String   ignoreExpr) { this.ignoreExpr = ignoreExpr; }
237     /**
238      * Setter method for "role" tag attribute.
239      * (Mapping set in associated BeanInfo class.)
240      */
241     public void setRoleExpr(String   roleExpr) { this.roleExpr = roleExpr; }
242     /**
243      * Setter method for "controllerUrl" tag attribute.
244      * (Mapping set in associated BeanInfo class.)
245      */
246     public void setControllerUrlExpr(String   controllerUrlExpr) { this.controllerUrlExpr = controllerUrlExpr; }
247     /**
248      * Setter method for "controllerClass" tag attribute.
249      * (Mapping set in associated BeanInfo class.)
250      */
251     public void setControllerClassExpr(String   controllerClassExpr) { this.controllerClassExpr = controllerClassExpr; }
252 
253     /**
254      * Resets attribute values for tag reuse.
255      */
256     public void release()
257     {
258         super.release();
259         setTemplateExpr(null);
260         setComponentExpr(null);
261         setPageExpr(null);
262         setDefinitionExpr(null);
263         setAttributeExpr(null);
264         setNameExpr(null);
265         setBeanNameExpr(null);
266         setBeanPropertyExpr(null);
267         setBeanScopeExpr(null);
268         setFlushExpr(null);
269         setIgnoreExpr(null);
270         setRoleExpr(null);
271         setControllerUrlExpr(null);
272         setControllerClassExpr(null);
273     }
274     
275     /**
276      * Process the start tag.
277      *
278      * @exception JspException if a JSP exception has occurred
279      */
280     public int doStartTag() throws JspException   {
281         evaluateExpressions();
282         return (super.doStartTag());
283     }
284     
285     /**
286      * Processes all attribute values which use the JSTL expression evaluation
287      * engine to determine their values.
288      *
289      * @exception JspException if a JSP exception has occurred
290      */
291     private void evaluateExpressions() throws JspException   {
292         String    string  = null;
293         Boolean   bool    = null;
294 
295         if ((string = EvalHelper.evalString("template", getTemplateExpr(),
296                                             this, pageContext)) != null)
297             setTemplate(string);
298         if ((string = EvalHelper.evalString("component", getComponentExpr(),
299                                             this, pageContext)) != null)
300             setComponent(string);
301         if ((string = EvalHelper.evalString("page", getPageExpr(),
302                                             this, pageContext)) != null)
303             setPage(string);
304         if ((string = EvalHelper.evalString("definition", getDefinitionExpr(),
305                                             this, pageContext)) != null)
306             setDefinition(string);
307         if ((string = EvalHelper.evalString("attribute", getAttributeExpr(),
308                                             this, pageContext)) != null)
309             setAttribute(string);
310         if ((string = EvalHelper.evalString("name", getNameExpr(),
311                                             this, pageContext)) != null)
312             setName(string);
313         if ((string = EvalHelper.evalString("beanName", getBeanNameExpr(),
314                                             this, pageContext)) != null)
315             setBeanName(string);
316         if ((string = EvalHelper.evalString("beanProperty", getBeanPropertyExpr(),
317                                             this, pageContext)) != null)
318             setBeanProperty(string);
319         if ((string = EvalHelper.evalString("beanScope", getBeanScopeExpr(),
320                                             this, pageContext)) != null)
321             setBeanScope(string);
322         if ((string = EvalHelper.evalString("flush", getFlushExpr(),
323                                             this, pageContext)) != null)
324             setFlush(string);
325         if ((bool = EvalHelper.evalBoolean("ignore", getIgnoreExpr(),
326                                            this, pageContext)) != null)
327             setIgnore(bool.booleanValue());
328         if ((string = EvalHelper.evalString("role", getRoleExpr(),
329                                             this, pageContext)) != null)
330             setRole(string);
331         if ((string = EvalHelper.evalString("controllerUrl", getControllerUrlExpr(),
332                                             this, pageContext)) != null)
333             setControllerUrl(string);
334         if ((string = EvalHelper.evalString("controllerClass", getControllerClassExpr(),
335                                             this, pageContext)) != null)
336             setControllerClass(string);
337     }
338 }
339
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