1 package org.simantics.db.layer0.variable;
3 import org.simantics.db.ReadGraph;
4 import org.simantics.db.Resource;
5 import org.simantics.db.exception.DatabaseException;
7 public class StandardVariableBuilder<Node> implements VariableBuilder<Node> {
9 private static StandardVariableBuilder<?> INSTANCE = null;
11 private StandardVariableBuilder() {}
13 public static synchronized StandardVariableBuilder<?> get() {
14 if(INSTANCE == null) {
15 INSTANCE = new StandardVariableBuilder<>();
21 public Variable buildChild(ReadGraph graph, Variable parent, VariableNode<Node> node, Resource child) {
22 return new StandardGraphChildVariable(parent, node, child);
26 public Variable buildProperty(ReadGraph graph, Variable parent, VariableNode<Node> node, Resource subject, Resource predicate) throws DatabaseException {
27 return new StandardGraphPropertyVariable(graph, parent, node, subject, predicate);