X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Fvariable%2FVariableNode.java;fp=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Fvariable%2FVariableNode.java;h=98f63d3771a80d67a7c48c5f47b81de29ae9c706;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/VariableNode.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/VariableNode.java
new file mode 100644
index 000000000..98f63d377
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/VariableNode.java
@@ -0,0 +1,38 @@
+package org.simantics.db.layer0.variable;
+
+public class VariableNode<Node> {
+    public final NodeSupport<Node> support;
+    public final Object node;
+    private int hash;
+    public VariableNode(NodeSupport<Node> support, Object node) {
+    	assert(support != null);
+        this.support = support;
+        this.node = node;
+    }
+    
+    private int computeHash() {
+        return 31*support.hashCode() + 41*node.hashCode();
+    }
+
+    @Override
+    public int hashCode() {
+        if (hash == 0)
+            hash = computeHash();
+        return hash;
+    }
+    
+    @Override
+    public boolean equals(Object object) {
+        if (this == object)
+            return true;
+        else if (object == null)
+            return false;
+        else if (!(object instanceof VariableNode))
+            return false;
+        VariableNode<?> r = (VariableNode<?>)object;
+        if (r.hashCode() != hashCode())
+            return false;
+        return r.support.equals(support) && r.node.equals(node);
+    }
+    
+}