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


1 package albel.tags.table;
2
3 import albel.tags.table.controll.Manager;
4 import albel.tags.table.model.Column;
5 import albel.tags.table.model.ColumnType;
6 import albel.tags.table.model.Table;
7 import albel.tags.table.model.TableTagException;
8 import albel.tags.table.utils.HttpSessionAttributesMap;
9 import javax.servlet.http.HttpServletRequest JavaDoc;
10 import javax.servlet.jsp.JspException JavaDoc;
11 import javax.servlet.jsp.tagext.BodyTagSupport JavaDoc;
12
13 /**
14  * @author albel
15  *Column definition tag
16  */
17 public class ColumnTag extends BodyTagSupport JavaDoc
18 {
19     
20     public ColumnTag()
21     {
22         super();
23     }
24     
25     private String JavaDoc property;
26     
27     /**
28      * Holds value of property type.
29      */
30     private String JavaDoc type;
31     
32     /**
33      * Holds value of property width.
34      */
35     private int width;
36     
37     ////////////////////////////////////////////////////////////////
38 /// ///
39 /// User methods. ///
40 /// ///
41 /// Modify these methods to customize your tag handler. ///
42 /// ///
43 ////////////////////////////////////////////////////////////////
44
45     
46     //
47 // methods called from doStartTag()
48 //
49 /**
50      *
51      * Fill in this method to perform other operations from doStartTag().
52      *
53      */
54     public void otherDoStartTagOperations()
55     {
56         
57         //
58 // TODO: code that performs other operations in doStartTag
59 // should be placed here.
60 // It will be called after initializing variables,
61 // finding the parent, setting IDREFs, etc, and
62 // before calling theBodyShouldBeEvaluated().
63 //
64 // For example, to print something out to the JSP, use the following:
65 //
66 // try {
67 // JspWriter out = pageContext.getOut();
68 // out.println("something");
69 // } catch (java.io.IOException ex) {
70 // // do something
71 // }
72 //
73 //
74
75         
76     }
77     
78     /**
79      *
80      * Fill in this method to determine if the tag body should be evaluated
81      * Called from doStartTag().
82      *
83      */
84     public boolean theBodyShouldBeEvaluated()
85     {
86         
87         //
88 // TODO: code that determines whether the body should be
89 // evaluated should be placed here.
90 // Called from the doStartTag() method.
91 //
92 return true;
93         
94     }
95     
96     
97     //
98 // methods called from doEndTag()
99 //
100 /**
101      *
102      * Fill in this method to perform other operations from doEndTag().
103      *
104      */
105     public void otherDoEndTagOperations()
106     {
107         
108         //
109 // TODO: code that performs other operations in doEndTag
110 // should be placed here.
111 // It will be called after initializing variables,
112 // finding the parent, setting IDREFs, etc, and
113 // before calling shouldEvaluateRestOfPageAfterEndTag().
114 //
115
116         
117     }
118     
119     /**
120      *
121      * Fill in this method to determine if the rest of the JSP page
122      * should be generated after this tag is finished.
123      * Called from doEndTag().
124      *
125      */
126     public boolean shouldEvaluateRestOfPageAfterEndTag()
127     {
128         
129         //
130 // TODO: code that determines whether the rest of the page
131 // should be evaluated after the tag is processed
132 // should be placed here.
133 // Called from the doEndTag() method.
134 //
135 return true;
136         
137     }
138     
139     
140     ////////////////////////////////////////////////////////////////
141 /// ///
142 /// Tag Handler interface methods. ///
143 /// ///
144 /// Do not modify these methods; instead, modify the ///
145 /// methods that they call. ///
146 /// ///
147 ////////////////////////////////////////////////////////////////
148
149     
150     /**
151      * Dummy javadoc comment to get things started.
152      */
153     public int doStartTag() throws JspException JavaDoc
154     {
155         try
156         {
157             if(this.getParent() instanceof albel.tags.table.RowsTag)
158             {
159                 doContextRows();
160             }
161             else
162                 if(this.getParent() instanceof albel.tags.table.NewRowColumnsTag)
163                     doContextNewRow();
164         }
165         catch (TableTagException tex)
166         {
167             throw new JspException JavaDoc(tex);
168         }
169         return this.EVAL_BODY_INCLUDE;
170     }
171     /**
172      *Sets up columns displayable in table rows
173      */
174     private void doContextRows()throws TableTagException
175     {
176         HttpServletRequest JavaDoc request=(HttpServletRequest JavaDoc)pageContext.getRequest();
177         HttpSessionAttributesMap attrs=new HttpSessionAttributesMap(request.getSession());
178         TableTag tableTag=(TableTag)this.getParent().getParent();
179         Table table=Manager.getTable(attrs, tableTag.getId());
180         boolean has=table.hasColumn(getProperty());
181         if(!has)
182         {
183             Column col=new Column(table);
184             col.setProperty(getProperty());
185             col.setType(ColumnType.getInstance(getType()));
186             col.setWidth(getWidth());
187             table.addColumn(col);
188         }
189     }
190     /**
191      *Sets up columns displayable in new row block
192      */
193     private void doContextNewRow()throws TableTagException
194     {
195         HttpServletRequest JavaDoc request=(HttpServletRequest JavaDoc)pageContext.getRequest();
196         HttpSessionAttributesMap attrs=new HttpSessionAttributesMap(request.getSession());
197         TableTag tableTag=(TableTag)this.getParent().getParent();
198         Table table=Manager.getTable(attrs, tableTag.getId());
199         boolean has=table.getNewRowColumns().hasColumn(getProperty());
200         if(!has)
201         {
202             Column col=new Column(table);
203             col.setProperty(getProperty());
204             col.setType(ColumnType.getInstance(getType()));
205             col.setWidth(getWidth());
206             table.getNewRowColumns().addColumn(col);
207         }
208     }
209     
210     /**
211      * Dummy javadoc comment to get things started.
212      */
213     public int doEndTag() throws JspException JavaDoc
214     {
215         // Dummy body to get things going.
216 return EVAL_PAGE;
217     }
218     
219     /** Getter for property property.
220      * @return Value of property property.
221      *
222      */
223     public String JavaDoc getProperty()
224     {
225         return property;
226     }
227     
228     /** Setter for property property.
229      * @param property New value of property property.
230      *
231      */
232     public void setProperty(String JavaDoc property)
233     {
234         this.property=property;
235     }
236     
237     /**
238      * Getter for property type.
239      * @return Value of property type.
240      */
241     public String JavaDoc getType()
242     {
243         return this.type;
244     }
245     
246     /**
247      * Setter for property type.
248      * @param type New value of property type.
249      */
250     public void setType(String JavaDoc type)
251     {
252         this.type = type;
253     }
254     
255     /**
256      * Getter for property width.
257      * @return Value of property width.
258      */
259     public int getWidth()
260     {
261         return this.width;
262     }
263     
264     /**
265      * Setter for property width.
266      * @param width New value of property width.
267      */
268     public void setWidth(int width)
269     {
270         this.width = width;
271     }
272     
273 }
274
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