AttributeValue


1   package com.ca.directory.jxplorer.viewer.tableviewer;
2   
3   import com.ca.directory.jxplorer.editor.*;
4   import com.ca.commons.cbutil.CBIntText;
5   
6   import java.util.logging.Logger  ;
7   
8   
9   /**
10   *    TableAttributeEditor utility class; encapsulates the idea of
11   *    an editable (String) attribute value, as displayed in a table.
12   *    It also checks to see if an attribute is Binary, and sets a
13   *    'binary' flag as a warning to cell editors to use special 
14   *    handling.
15   */
16   
17  public class AttributeValue implements editablebinary, editablestring
18  {
19      public Object   value;
20      Object   backup;
21      boolean changed;
22      boolean binary;
23      String   id;
24      String  [] options = null;
25  
26      private final static Logger   log = Logger.getLogger(AttributeValue.class.getName());
27  
28      /**
29       *    Whether this is a naming value.
30       */
31       
32      boolean naming;
33      
34      /**
35       * initialise with an object, take a backup, and set changed to false   
36       */
37      public AttributeValue(String   ID, Object   v) 
38      { 
39          id = ID;
40          value = v; 
41          backup = v; 
42          changed=false; 
43          naming=false;
44          testBinary();
45      }
46  
47      /**
48       *  sets whether this value is a naming value (e.g. the 'Smith' in cn=Smith).
49       */
50       
51      public void setNamingStatus(boolean state) 
52      {
53          naming = state;
54      }
55  
56      /**
57       *    Returns whether this value is a naming value.
58       */
59       
60      public boolean isNaming()
61      {
62          return naming;
63      } 
64  
65      /**
66       *    Whether the Attribute Value has been given a set of
67       *    suggested values.
68       */  
69          
70      public boolean hasOptions() { return (options!=null); } 
71      
72      /**
73       *    adds a list of suggested options to the Attribute Value...
74       */
75       
76      public void setOptions(String  [] ops) 
77      { 
78          options = ops; 
79      } 
80  
81      /**
82       *    adds a list of suggested options to the Attribute Value...
83       */
84       
85      public String  [] getOptions() { return options; } 
86  
87      
88      /**
89       * update object 
90       */
91      public void update(Object   data)
92      {
93          value = data;
94          testBinary();
95          if (binary==false)
96          {
97              value = getStringValue(); // special space handling...
98          }
99          changed = (value != backup);  // if value not the same as original, it's changed!
100 
101     }
102     
103     /**
104      *    synonym for update, used for EditableBinary interface...
105      */
106     public void setValue(byte[] b)
107     {
108         update(b);
109     }
110     
111     
112     /**
113      *    synonym for update, used for EditableString interface...
114      *
115      */
116     public void setStringValue(String   b)
117     {
118         update(b);
119     }
120     
121     
122     public byte[] getValue()
123     {
124         if (binary)
125         {
126             if (value instanceof String  )  // may happen if it's been initialised with an empty string.
127             {
128                 log.warning("warning - Attribute Value " + value + " mis represented as byte array data");
129                 return null;        //TE this was commented out, but it seems to fix the problem of clicking reset which disables the binary fields until submit is clicked.
130             }    
131             else    
132                 return ((byte[]) value);
133         }            
134         else
135             return null;
136     }
137 
138      
139     /** 
140      *
141      */
142 
143     public String   getStringValue()
144     {
145         if (binary == false)
146         {
147             String   val = ((String  ) value);
148             if (naming) // special handling for spaces - bug 4886
149             {
150                 int len = val.length();
151                 val = val.trim();
152                 if (val.length() == 0 && len>0)
153                     val = " ";
154             }
155             return val;
156         }
157         else 
158             return null;
159     }
160 
161 
162 
163     /**
164      * reset the value back to what it was initialised with.
165      */
166     public void reset()
167     {
168         value = backup;
169         changed = false;
170         testBinary();
171     }
172     
173     /** 
174      *  sets the binary-ness of the attribute (this may be known externally
175      *  from schema).
176      */
177     public void setBinary(boolean bin)
178     {
179         binary = bin;
180         if (bin==true && value instanceof String  )
181             value = null;
182     }
183     
184     /**
185      *    Checks whether the object is binary (actually, it checks if
186      *    the object <b>isn't</b> a String...)
187      */
188     public boolean testBinary() 
189     { 
190         if (binary==true) return true;  // once it's set to binary, it stays that way.
191         
192         binary = (value==null)?false:((value instanceof String  )?false:true);
193         return binary;
194     } 
195 
196     public boolean isEmpty()  
197     { 
198         if (value==null) return true;
199         if (binary) 
200         {
201             if (value instanceof byte[])
202                 if (((byte[])value).length == 0)
203                     return true;    // XXX don't believe this code ever runs...
204 
205             return false;
206         }    
207         
208         return (value.toString().length()==0);
209     }
210 
211     /**
212      *    Returns value as string.  NB. - returns null values and empty
213      *    Strings as 1 character blanks, in order to get buggy Swing 
214      *    printing junk to work.
215      */
216      
217     public String   toString() 
218     { 
219         if (value == null) return " ";                  // XXX Hack to get Broken swing printing working
220         
221         //TE: moved this line of code to before the following one...seems to fix the displaying of 
222         //    '(binary Value)' to empty attribute values when the Reset button is clicked (bug 2319).
223         if (value.toString().length() == 0) return " "; // XXX Hack to get Broken swing printing working
224     
225         if (binary) return CBIntText.get("(non string data)");
226 
227         return value.toString(); 
228     }
229     
230     public String    getID()    { return id; }
231     public boolean changed()  { return changed; }
232     public Object    value()    { return value; }
233     public Object    backup()   { return backup; } 
234     public boolean isBinary() { return binary; }
235 }
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags