1 files changed, 93 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/FunctionalInterfaceNode.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/FunctionalInterfaceNode.java
new file mode 100644
index 0000000000..5446a0584c
--- /dev/null
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/FunctionalInterfaceNode.java
@@ -0,0 +1,93 @@
+package org.checkerframework.dataflow.cfg.node;
+
+import org.checkerframework.javacutil.ErrorReporter;
+import org.checkerframework.javacutil.InternalUtils;
+
+import java.util.Collection;
+import java.util.LinkedList;
+
+import com.sun.source.tree.LambdaExpressionTree;
+import com.sun.source.tree.MemberReferenceTree;
+import com.sun.source.tree.Tree;
+
+/**
+ * A node for member references and lambdas.
+ *
+ * The {@link Node#type} of a FunctionalInterfaceNode is determined by the
+ * assignment context the member reference or lambda is used in.
+ *
+ * <pre>
+ *   <em>FunctionalInterface func = param1, param2, ... &rarr; statement</em>
+ * </pre>
+ *
+ * <pre>
+ *   <em>FunctionalInterface func = param1, param2, ... &rarr; { ... }</em>
+ * </pre>
+ *
+ * <pre>
+ *   <em>FunctionalInterface func = member reference</em>
+ * </pre>
+ *
+ * @author David
+ *
+ */
+public class FunctionalInterfaceNode extends Node {
+
+    protected Tree tree;
+
+    public FunctionalInterfaceNode(MemberReferenceTree tree) {
+        super(InternalUtils.typeOf(tree));
+        this.tree = tree;
+    }
+
+    public FunctionalInterfaceNode(LambdaExpressionTree tree) {
+        super(InternalUtils.typeOf(tree));
+        this.tree = tree;
+    }
+
+    @Override
+    public Tree getTree() {
+        return tree;
+    }
+
+    @Override
+    public <R, P> R accept(NodeVisitor<R, P> visitor, P p) {
+        return visitor.visitMemberReference(this, p);
+    }
+
+    @Override
+    public String toString() {
+        if (tree instanceof LambdaExpressionTree) {
+            return "FunctionalInterfaceNode:" + ((LambdaExpressionTree) tree).getBodyKind();
+        } else if (tree instanceof MemberReferenceTree) {
+            return "FunctionalInterfaceNode:" + ((MemberReferenceTree) tree).getName();
+        } else {
+            // This should never happen.
+            ErrorReporter.errorAbort("Invalid tree in FunctionalInterfaceNode");
+            return null; // Dead code
+        }
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        FunctionalInterfaceNode that = (FunctionalInterfaceNode) o;
+
+        if (tree != null ? !tree.equals(that.tree) : that.tree != null) return false;
+
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        return tree != null ? tree.hashCode() : 0;
+    }
+
+    @Override
+    public Collection<Node> getOperands() {
+        LinkedList<Node> list = new LinkedList<Node>();
+        return list;
+    }
+}