X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.graph%2Fsrc%2Forg%2Fsimantics%2Fgraph%2Frepresentation%2FExtensions.java;h=375fb1416899f57bb40c66761b31504773bef870;hp=8a8cb3d568fa571e905a8bfc6a8c53245c77f856;hb=aab6399f20c07b61a0dbf9614614f44a2e0ea325;hpb=fb019f116468d003a751e4274a69ba01c34fa10b

diff --git a/bundles/org.simantics.graph/src/org/simantics/graph/representation/Extensions.java b/bundles/org.simantics.graph/src/org/simantics/graph/representation/Extensions.java
index 8a8cb3d56..375fb1416 100644
--- a/bundles/org.simantics.graph/src/org/simantics/graph/representation/Extensions.java
+++ b/bundles/org.simantics.graph/src/org/simantics/graph/representation/Extensions.java
@@ -2,18 +2,33 @@ package org.simantics.graph.representation;
 
 import java.util.TreeMap;
 
+import org.simantics.databoard.Bindings;
+import org.simantics.databoard.binding.Binding;
 import org.simantics.databoard.binding.mutable.Variant;
 
 public class Extensions {
-	
+
+	public static final Binding BINDING = Bindings.getBindingUnchecked(Extensions.class);
+
+	/**
+	 * Used for storing a cached hash code computed from a
+	 * {@link TransferableGraph1} instance <em>without</em> this cached hashcode
+	 * key,value pair in the <code>extensions</code> map.
+	 */
+	public final static String CACHED_HASHCODE = "cached.hashCode";
+
 	final public static String CLUSTERING = "clustering";
 	final public static String CLUSTER_SETS = "clusterSets";
 	final public static int NO_CLUSTER_SET = -1;
 	final public static int ROOT_LIBRARY_CLUSTER_SET = -1;
 	final public static int INDEX_ROOT_CLUSTER_SET = -2;
-	
-	public TreeMap<String, Variant> map = new TreeMap<String, Variant>();
-	
+
+	public TreeMap<String, Variant> map;
+
+	public Extensions() {
+		this.map = new TreeMap<>();
+	}
+
 	public Extensions(TreeMap<String, Variant> map) {
 		this.map = map;
 	}