ReferenceTypeStatics


1   package de.webman.generator; 
2   
3   import com.teamkonzept.db.*;
4   import com.teamkonzept.lib.*;
5   import com.teamkonzept.webman.db.*;
6   import de.webman.generator.db.queries.*;
7   
8   import java.sql.*;
9   
10  /**
11      Statische Daten und Methoden der Klasse ReferenceType
12      verwaltet die Dokumenttypen
13      * @author  $Author: alex $
14      * @version $Revision: 1.2 $
15  */
16  public class ReferenceTypeStatics 
17  {
18  
19      /**
20          Verweis zur�ck auf den aktuellen statischen Kontext des laufenden Threads
21      */
22      private GeneratorContext context;
23  
24      /**
25          verwaltet eine ReferenceType pro Referenz-Komponente aller Presentation
26          Key := Integer( presentationId )
27          Value = Hashtable mit (
28              Key := Integer( presComponentIdx )
29              Value := ReferenceType;
30          )
31      */
32      private TKHashtable presentations;
33  
34      public ReferenceTypeStatics (GeneratorContext context) {
35  
36          this.context = context != null ? context : GeneratorContext.setup ();
37          this.presentations = null;
38      }
39  
40      /**
41          Holt alle ReferenzTypes aller Presentations
42          aus der DB und verwaltet sie
43          in der Hashtable presetations
44      */
45      public void getTypes()
46      {
47          try {
48              TKQuery q = TKWebmanDBManager.newQuery(GenRefTypes.class);
49              q.execute();
50              ResultSet rs = q.fetchResultSet();
51  
52              TKHashtable lastHash = null;
53              ReferenceType lastType = null;
54              int lastPresId = -1;
55              int lastIdx = -1;
56  
57              presentations = new TKHashtable();
58  
59              while( rs.next() ) {
60                  int newPresId = rs.getInt( "PRESENTATION_ID" );
61                  if( lastPresId != newPresId ) {
62                      Integer   newKey = new Integer  ( newPresId );
63                      lastHash = (TKHashtable) presentations.get( newKey );
64                      if( lastHash == null ) {
65                          lastHash = new TKHashtable();
66                          presentations.put( newKey, lastHash );
67                      }
68                      lastIdx = -1;
69                  }
70                  int newIdx = rs.getInt( "PRESENTATION_COMPONENT_IDX" );
71                  if( lastIdx != newIdx ) {
72                      Integer   newKey = new Integer  ( newIdx );
73                      lastType = (ReferenceType) lastHash.get( newKey );
74                      if( lastType == null ) {
75                          lastType = new ReferenceType(context);
76                          lastHash.put( newKey, lastType );
77                      }
78                  }
79                  lastType.addType( rs.getInt( "SUB_PRESENTATION_ID" ) );
80              }
81          }
82          catch( SQLException e ) {
83              throw new TKSQLError( e.getMessage(), e );
84          }
85  
86      }
87  
88      /**
89          liefert das ReferenceType-Objekt einer Komponente einer Presentation
90      */
91      public final ReferenceType getType( int presId, int presIdx )
92      {
93          if( presentations == null ) return null;
94          TKHashtable v = (TKHashtable)presentations.get( new Integer  ( presId ) );
95          if( v == null )
96              return null;
97          return (ReferenceType)v.get( new Integer  ( presIdx ) );
98      }
99  
100     /**
101         ueberprueft, ob die Presentation mit PresentationId destPresId eine
102         gueltige Content-Quelle fuer die srcPresIdx-te Komponente der Presentation
103         mit Id srcPresId ist
104     */
105     public final boolean isValidType( int srcPresId, int srcPresIdx, int destPresId )
106     {
107         ReferenceType t = getType( srcPresId, srcPresIdx );
108         return ((t != null) && t.contains( destPresId ));
109     }
110 }
111
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