ContentFormStatics


1   package de.webman.generator; 
2   
3   import com.teamkonzept.lib.*;
4   import com.teamkonzept.field.*;
5   import com.teamkonzept.field.db.*;
6   
7   /**
8       Klasse ueber die die Formular-Klassen aus
9       der Datenbank gelesen werden koennen
10      
11      Gelesene Formulare werden in einem Hash-Cache gespeichert
12      * @author  $Author: alex $
13      * @version $Revision: 1.2 $
14   */
15  public class ContentFormStatics
16  {
17  
18      /**
19          Verweis zur�ck auf den aktuellen statischen Kontext des laufenden Threads
20      */
21      private GeneratorContext context;
22  
23      /**
24          Der Formular Cache
25          Key := Integer( formId )
26      */
27      private TKHashtable formHash;   // Cache
28      
29      public ContentFormStatics (GeneratorContext context) 
30      {
31          this.context = context != null ? context : GeneratorContext.setup ();
32          this.formHash = null;
33      }
34      
35      /**
36          Liefert das gewuenschte Formular
37      */
38      public TKBaseField getContentForm( int formId )
39      {
40          Integer   fID = new Integer  ( formId );
41          
42          // Formular im Cache suchen
43          Object   form = formHash.get( fID );
44          if( form != null ) {
45              return (TKBaseField) form;
46          }
47          
48          // Formular aus der DB holen 
49          TKBaseField newForm;
50          try 
51          {
52              TKFormDBData formData = new TKFormDBData( formId ); 
53              TKFormDBInterface.Get( formData );
54              newForm = TKFieldRegistry.getFieldFromDB( formData );
55          }
56          catch (Exception   ex) 
57          {
58              throw new Error  ( ex.getMessage() );
59          }
60          
61          // neues Formular in Cache eintragen
62          formHash.put( fID, newForm );
63          return newForm;
64      }
65      
66      /**
67          Initialisiert den Formular-Cache    
68      */
69      public void prepareFormHash()
70      {
71          formHash = new TKHashtable();
72      }
73  }
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