+package org.simantics.structural2.variables;\r
+\r
+import java.util.Collection;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.variable.Variable;\r
+\r
+public interface Connection {\r
+\r
+ /**\r
+ * Return absolute URIs of the connection points. An optional (may be null) relationType may be used\r
+ * to filter the returned connection points.\r
+ */\r
+ Collection<String> getConnectionPointURIs(ReadGraph graph, Resource relationType) throws DatabaseException;\r
+ /**\r
+ * Return the connection points. An optional (may be null) relationType may be used\r
+ * to filter the returned connection points.\r
+ */\r
+ Collection<Variable> getConnectionPoints(ReadGraph graph, Resource relationType) throws DatabaseException;\r
+ \r
+ Collection<VariableConnectionPointDescriptor> getConnectionPointDescriptors(ReadGraph graph, Resource relationType) throws DatabaseException;\r
+\r
+}\r