+package org.simantics.modeling.query;\r
+\r
+import java.util.Collection;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.variable.ProxyChildVariable;\r
+import org.simantics.db.layer0.variable.Variable;\r
+\r
+public class QueryProxyChildVariable extends ProxyChildVariable {\r
+\r
+ public QueryProxyChildVariable(Variable base, Variable parent, Variable other, String name) {\r
+ super(base, parent, other, name);\r
+ }\r
+\r
+ @Override\r
+ public Variable create(Variable base, Variable parent, Variable other, String name) {\r
+ return new QueryProxyChildVariable(base, parent, other, name);\r
+ }\r
+ \r
+ public Variable getPossibleChild(ReadGraph graph, String name) throws DatabaseException {\r
+ \r
+ if(CONTEXT_END.equals(name)) {\r
+ if(other instanceof ProxyChildVariable) {\r
+ // The context is also a proxy - let it do the job\r
+ return super.getPossibleChild(graph, name);\r
+ } else {\r
+ return new QueryRootVariable(this, base.getRepresents(graph));\r
+ }\r
+ }\r
+ \r
+ return super.getPossibleChild(graph, name);\r
+ \r
+ }\r
+ \r
+ public Collection<Variable> getChildren(ReadGraph graph) throws DatabaseException {\r
+\r
+ Collection<Variable> result = super.getChildren(graph);\r
+ if(!(base instanceof ProxyChildVariable)) {\r
+ result.add(new QueryRootVariable(this, base.getRepresents(graph)));\r
+ }\r
+ return result;\r
+ \r
+ } \r
+ \r
+}
\ No newline at end of file