bundles/org.simantics.structural2/src/org/simantics/structural2/variables/BrowseConnectionDescriptor.java

   1 package org.simantics.structural2.variables;\r
   2 \r
   3 import org.simantics.db.ReadGraph;\r
   4 import org.simantics.db.Resource;\r
   5 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;\r
   6 import org.simantics.db.common.request.UnaryRead;\r
   7 import org.simantics.db.exception.DatabaseException;\r
   8 import org.simantics.db.layer0.variable.Variable;\r
   9 \r
  10 public class BrowseConnectionDescriptor extends AbstractVariableConnectionPointDescriptor {\r
  11         \r
  12         public Variable base;\r
  13         public String rel;\r
  14         \r
  15         public BrowseConnectionDescriptor(Variable base, String rel) {\r
  16                 this.base = base;\r
  17                 this.rel = rel;\r
  18         }\r
  19         @Override\r
  20         public int hashCode() {\r
  21                 return base.hashCode() + 31*rel.hashCode();\r
  22         }\r
  23         @Override\r
  24         public boolean equals(Object object) {\r
  25         if (this == object)\r
  26             return true;\r
  27         else if (object == null)\r
  28             return false;\r
  29         else if (!(object instanceof BrowseConnectionDescriptor))\r
  30             return false;\r
  31         BrowseConnectionDescriptor r = (BrowseConnectionDescriptor)object;\r
  32         if(!r.rel.equals(rel)) return false;\r
  33         if(!r.base.equals(base)) return false;\r
  34         return true;\r
  35         }\r
  36         static class ComputeVariable extends UnaryRead<BrowseConnectionDescriptor, Variable> {\r
  37 \r
  38                 public ComputeVariable(BrowseConnectionDescriptor desc) {\r
  39                         super(desc);\r
  40                 }\r
  41 \r
  42                 @Override\r
  43                 public Variable perform(ReadGraph graph) throws DatabaseException {\r
  44                         return parameter.base.browse(graph, parameter.rel);\r
  45                 }\r
  46                 \r
  47         }\r
  48         @Override\r
  49         public Variable getVariable(ReadGraph graph) throws DatabaseException {\r
  50                 return graph.syncRequest(new ComputeVariable(this), TransientCacheAsyncListener.<Variable>instance());\r
  51         }\r
  52         public String getURI(ReadGraph graph) throws DatabaseException {\r
  53                 return getVariable(graph).getURI(graph);\r
  54         }\r
  55         @Override\r
  56         public Resource getConnectionPointResource(ReadGraph graph) throws DatabaseException {\r
  57                 return getVariable(graph).getPossiblePredicateResource(graph);\r
  58         }\r
  59         \r
  60         @Override\r
  61         public boolean isFlattenedFrom(ReadGraph graph, Variable possiblyStructuralCp) throws DatabaseException {\r
  62                 \r
  63                 Variable baseParent = base.getParent(graph);\r
  64                 Variable parent = possiblyStructuralCp.getParent(graph);\r
  65                 Variable parentParent = parent.getParent(graph);\r
  66                 \r
  67                 if(baseParent.equals(parentParent)) {\r
  68                         if(!parent.equals(base)) return false;\r
  69                 }\r
  70 \r
  71                 String descURI = getURI(graph);\r
  72                 String parentURI = parent.getURI(graph);\r
  73                 if(descURI.startsWith(parentURI)) {\r
  74                         // Children are in substructure\r
  75                         if('/' == descURI.charAt(parentURI.length())) return true;\r
  76                         // Otherwise require exact match\r
  77                         return descURI.endsWith(possiblyStructuralCp.getName(graph));\r
  78                 } else {\r
  79                         return false;\r
  80                 }\r
  81                 \r
  82         }\r
  83         \r
  84 }