X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Fvariable%2FStandardVariableBuilder.java;fp=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Fvariable%2FStandardVariableBuilder.java;h=6e83fe139fe77f5dadc3dd069f4bc6e6de56038c;hb=63bb6d595c37b3a2fb55e07fb810779cae3b4d03;hp=b1af87f98490016490d0891087da8e5679946d47;hpb=26b755c7e98b7bb3d9038abba139bef0e71f6607;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/StandardVariableBuilder.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/StandardVariableBuilder.java
index b1af87f98..6e83fe139 100644
--- a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/StandardVariableBuilder.java
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/StandardVariableBuilder.java
@@ -6,6 +6,17 @@ import org.simantics.db.exception.DatabaseException;
 
 public class StandardVariableBuilder<Node> implements VariableBuilder<Node> {
 
+    private static StandardVariableBuilder INSTANCE = null;
+    
+    private StandardVariableBuilder() {}
+    
+    public static synchronized StandardVariableBuilder get() {
+        if(INSTANCE == null) {
+            INSTANCE = new StandardVariableBuilder<>();
+        }
+        return INSTANCE;
+    }
+
 	@Override
 	public Variable buildChild(ReadGraph graph, Variable parent, VariableNode<Node> node, Resource child) {
 		return new StandardGraphChildVariable(parent, node, child);