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Java > Open Source Codes > albel > tags > table > RowHandlerTag


1 package albel.tags.table;
2
3 import javax.servlet.jsp.*;
4 import javax.servlet.*;
5 import javax.servlet.jsp.tagext.*;
6 import javax.servlet.http.*;
7 import albel.tags.table.utils.*;
8 import albel.tags.table.model.*;
9 import albel.tags.table.controll.*;
10 /**
11  * @author albel
12  * This tag contains handler definition of table data rows.
13  */
14 public class RowHandlerTag extends BodyTagSupport
15 {
16     
17     /**
18      * Object that exists in request to handle data changes in the table
19      */
20     private String JavaDoc handlerObject;
21     
22     /**
23      * Class that will be created to handle table data changes
24      */
25     private String JavaDoc handlerClass;
26     
27     public RowHandlerTag()
28     {
29         super();
30     }
31     
32     ////////////////////////////////////////////////////////////////
33 /// ///
34 /// User methods. ///
35 /// ///
36 /// Modify these methods to customize your tag handler. ///
37 /// ///
38 ////////////////////////////////////////////////////////////////
39
40     
41     //
42 // methods called from doStartTag()
43 //
44 /**
45      *
46      * Fill in this method to perform other operations from doStartTag().
47      *
48      */
49     public void otherDoStartTagOperations()
50     {
51         
52         //
53 // TODO: code that performs other operations in doStartTag
54 // should be placed here.
55 // It will be called after initializing variables,
56 // finding the parent, setting IDREFs, etc, and
57 // before calling theBodyShouldBeEvaluated().
58 //
59 // For example, to print something out to the JSP, use the following:
60 //
61 // try {
62 // JspWriter out = pageContext.getOut();
63 // out.println("something");
64 // } catch (java.io.IOException ex) {
65 // // do something
66 // }
67 //
68 //
69
70         
71     }
72     
73     /**
74      *
75      * Fill in this method to determine if the tag body should be evaluated
76      * Called from doStartTag().
77      *
78      */
79     public boolean theBodyShouldBeEvaluated()
80     {
81         
82         //
83 // TODO: code that determines whether the body should be
84 // evaluated should be placed here.
85 // Called from the doStartTag() method.
86 //
87 return true;
88         
89     }
90     
91     
92     //
93 // methods called from doEndTag()
94 //
95 /**
96      *
97      * Fill in this method to perform other operations from doEndTag().
98      *
99      */
100     public void otherDoEndTagOperations()
101     {
102         
103         //
104 // TODO: code that performs other operations in doEndTag
105 // should be placed here.
106 // It will be called after initializing variables,
107 // finding the parent, setting IDREFs, etc, and
108 // before calling shouldEvaluateRestOfPageAfterEndTag().
109 //
110
111         
112     }
113     
114     /**
115      *
116      * Fill in this method to determine if the rest of the JSP page
117      * should be generated after this tag is finished.
118      * Called from doEndTag().
119      *
120      */
121     public boolean shouldEvaluateRestOfPageAfterEndTag()
122     {
123         
124         //
125 // TODO: code that determines whether the rest of the page
126 // should be evaluated after the tag is processed
127 // should be placed here.
128 // Called from the doEndTag() method.
129 //
130 return true;
131         
132     }
133     
134     
135     ////////////////////////////////////////////////////////////////
136 /// ///
137 /// Tag Handler interface methods. ///
138 /// ///
139 /// Do not modify these methods; instead, modify the ///
140 /// methods that they call. ///
141 /// ///
142 ////////////////////////////////////////////////////////////////
143
144     
145     /**
146      * Methos calls Manager to setup row handler
147      */
148     public int doStartTag() throws JspException
149     {
150         TableTag tableTag=(TableTag)this.getParent().getParent().getParent();
151         HttpServletRequest request=(HttpServletRequest)pageContext.getRequest();
152         HttpRequestAttributesMap attrsReq=new HttpRequestAttributesMap(request);
153         HttpSessionAttributesMap attrsSes=new HttpSessionAttributesMap(request.getSession());
154         try
155         {
156             Manager.setupRowHandler(attrsSes,attrsReq,tableTag.getId(), getHandlerClass(), getHandlerObject());
157         }
158         catch (albel.tags.table.model.TableTagException tex)
159         {
160             throw new JspException();
161         }
162         return this.EVAL_BODY_INCLUDE;
163     }
164     
165     
166     /**
167      * Dummy javadoc comment to get things started.
168      */
169     public int doEndTag() throws JspException
170     {
171         // Dummy body to get things going.
172 return EVAL_PAGE;
173     }
174     
175     /**
176      * Getter for property handlerObject.
177      * @return Value of property handlerObject.
178      */
179     public String JavaDoc getHandlerObject()
180     {
181         return this.handlerObject;
182     }
183     
184     /**
185      * Setter for property handlerObject.
186      * @param handlerObject New value of property handlerObject.
187      */
188     public void setHandlerObject(String JavaDoc handlerObject)
189     {
190         this.handlerObject = handlerObject;
191     }
192     
193     /**
194      * Getter for property handlerClass.
195      * @return Value of property handlerClass.
196      */
197     public String JavaDoc getHandlerClass()
198     {
199         return this.handlerClass;
200     }
201     
202     /**
203      * Setter for property handlerClass.
204      * @param handlerClass New value of property handlerClass.
205      */
206     public void setHandlerClass(String JavaDoc handlerClass)
207     {
208         this.handlerClass = handlerClass;
209     }
210     
211 }
212
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