GenericTableColumn


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2   // $Id: GenericTableColumn.java,v 1.7 2005/08/02 23:45:21 davidahall Exp $
3   // Copyright (c) 2003-2005  David A. Hall
4   // ============================================================================
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32  package net.sf.jga.swing;
33  
34  import javax.swing.table.TableCellEditor  ;
35  import javax.swing.table.TableCellRenderer  ;
36  import javax.swing.table.TableColumn  ;
37  import net.sf.jga.fn.BinaryFunctor;
38  import net.sf.jga.fn.UnaryFunctor;
39  
40  /**
41   * Column class used in conjuction with GenericTableModel.
42   * <p>
43   * Copyright &copy; 2003-2005  David A. Hall
44   *
45   * @author <a HREF="mailto:davidahall@users.sf.net">David A. Hall</a>
46   */
47  
48  public class GenericTableColumn<R,C>  extends TableColumn   {
49      
50      static final long serialVersionUID = 1960293231258498520L;
51      
52      private Class  <C> _coltype;
53      private UnaryFunctor<R,C> _getFn;
54      private BinaryFunctor<R,C,C> _setFn;
55  
56      /**
57       * Builds a read-only column that will apply the given functor to objects of
58       * the given class to get the value of specific cells.  A default table
59       * renderer will be used, as defined by the Table that uses this column.
60       */
61      public GenericTableColumn(Class  <C> coltype, UnaryFunctor<R,C> getFn) {
62          this(coltype, getFn, null);
63      }
64  
65      /**
66       * Builds a potentially editable column that will apply the given functors to
67       * objects of the given class to get and set the value of specific cells.
68       * The setFn can be null: if it is, then this column will not be editable.
69       * A default table renderer and editor will be used, as defined by the Table
70       * that uses this column.
71       *
72       */
73      public GenericTableColumn(Class  <C> coltype, UnaryFunctor<R,C> getFn,
74                                BinaryFunctor<R,C,C> setFn)
75      {
76          _coltype = coltype;
77          _getFn   = getFn;
78          _setFn   = setFn;
79      }
80      
81      /**
82       * Builds a potentially editable column that will apply the given functors
83       * to objects of the given class to get and set the value of specific cells.
84       * The setFn can be null: if it is, then this column will not be editable.
85       * The formatter will be used to build a GenericTableCellRenderer for the
86       * column if it is non-null.  If formatter, parser, and setFn are all
87       * non-null, then a GenericCellEditor will be built for this column.  If any
88       * of these fields are null, the the Table that uses this column will supply
89       * the default renderer/editor. 
90       */
91      public GenericTableColumn(Class  <C> coltype, UnaryFunctor<R,C> getFn,
92                                BinaryFunctor<R,C,C> setFn, 
93                                UnaryFunctor<C,String  > formatter,
94                                UnaryFunctor<String  ,C> parser)
95      {
96          this(coltype, getFn, setFn);
97       
98          if (formatter != null) {
99              setCellRenderer(new GenericTableCellRenderer<C>(formatter));
100 
101             if (parser != null && setFn != null) {
102                 setCellEditor(new GenericCellEditor<C>(formatter, parser));
103             }
104         }
105     }
106     
107 
108     /**
109      * Builds a potentially editable column that will apply the given functors
110      * to objects of the given class to get and set the value of specific cells.
111      * The setFn can be null: if it is, then this column will not be editable.
112      * Either the renderer or editor may be null: the Table will supply the
113      * default renderer/editor in this case.  Note that if the setFn is null,
114      * there will be no editor configured (as it would never be called anyway).
115      */
116     public GenericTableColumn(Class  <C> coltype, UnaryFunctor<R,C> getFn,
117                               BinaryFunctor<R,C,C> setFn,
118                               TableCellRenderer   renderer, TableCellEditor   editor)
119     {
120         this(coltype, getFn, setFn);
121         setCellRenderer(renderer);
122         if (setFn != null)
123             setCellEditor(editor);
124     }
125     
126 
127     /*
128      *
129      */
130     public C getValueAt (R rowvalue) {
131         return _getFn.fn(rowvalue);
132     }
133 
134     /*
135      *
136      */
137     public void setValueAt (R rowvalue, Object   obj) {
138         if (_setFn != null) {
139             // @SuppressWarnings
140             //
141             _setFn.fn(rowvalue, (C) obj); 
142         }
143     }
144     
145     /*
146      *
147      */
148     public boolean isEditable() {
149         return _setFn != null;
150     }
151 
152     /*
153      *
154      */
155     public Class  <C> getColumnClass() {
156         return _coltype;
157     }
158     
159     /*
160      *
161      */
162     public String   toString() {
163         return super.toString() +"["+_getFn+","+_setFn+"]";
164     }
165 }
166
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