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

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