bundles/org.simantics.datatypes/src/org/simantics/datatypes/utils/BTreeContentBean.java

   1 package org.simantics.datatypes.utils;\r
   2 \r
   3 import org.simantics.databoard.binding.mutable.Variant;\r
   4 import org.simantics.databoard.util.Bean;\r
   5 import org.simantics.datatypes.DatatypeResource;\r
   6 import org.simantics.db.ReadGraph;\r
   7 import org.simantics.db.Resource;\r
   8 import org.simantics.db.common.primitiverequest.PossibleRelatedValue;\r
   9 import org.simantics.db.common.procedure.adapter.TransientCacheListener;\r
  10 import org.simantics.db.exception.DatabaseException;\r
  11 import org.simantics.db.service.SerialisationSupport;\r
  12 import org.simantics.db.service.XSupport;\r
  13 \r
  14 final public class BTreeContentBean extends Bean {\r
  15         public static int counter = 0;\r
  16         public boolean leaf;\r
  17         public int n;\r
  18         public PossibleVariant[] key;\r
  19         public PossibleResource[] value;\r
  20         public PossibleResource[] c;\r
  21         public BTreeContentBean() {\r
  22         }\r
  23         public static BTreeContentBean create(int t) {\r
  24                 BTreeContentBean result = new BTreeContentBean();\r
  25                 result.leaf = true;\r
  26                 result.n = 0;\r
  27                 result.key = new PossibleVariant[2*t-1];\r
  28                 result.value = new PossibleResource[2*t-1];\r
  29                 for(int i=0;i<2*t-1;i++) {\r
  30                         result.key[i] = new PossibleVariant();\r
  31                         result.value[i] = new PossibleResource();\r
  32                 }\r
  33                 result.c = new PossibleResource[2*t];\r
  34                 for(int i=0;i<2*t;i++) result.c[i] = new PossibleResource();\r
  35                 return result;\r
  36         }\r
  37         \r
  38         public void reduceSize() {\r
  39                 assert (n > 0);\r
  40                 key[n - 1] = new PossibleVariant();\r
  41                 value[n - 1] = new PossibleResource();\r
  42                 c[n] = new PossibleResource();\r
  43                 n--;\r
  44         }\r
  45         \r
  46         public Variant getKey(int index) {\r
  47                 return key[index].v;\r
  48         }\r
  49 \r
  50         public Resource getValue(int index) {\r
  51                 return value[index].r;\r
  52         }\r
  53 \r
  54         public Resource getChild(int index) {\r
  55                 return c[index].r;\r
  56         }\r
  57 \r
  58         public static BTreeContentBean readPossible(ReadGraph graph, Resource r) throws DatabaseException {\r
  59         DatatypeResource DATA = DatatypeResource.getInstance(graph);\r
  60                 SerialisationSupport ss = graph.getService(SerialisationSupport.class);\r
  61                 XSupport xs = graph.getService(XSupport.class);\r
  62                 BTreeContentBinding CONTENT_BEAN_BINDING = new BTreeContentBinding(ss, xs);\r
  63                 return graph.syncRequest(new PossibleRelatedValue<BTreeContentBean>(r, DATA.BTreeNode_content, CONTENT_BEAN_BINDING), TransientCacheListener.<BTreeContentBean>instance());\r
  64         }\r
  65         \r
  66         \r
  67 }