1 files changed, 87 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/ArrayAccessNode.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/ArrayAccessNode.java
new file mode 100644
index 0000000000..c51d7c1fbf
--- /dev/null
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/ArrayAccessNode.java
@@ -0,0 +1,87 @@
+package org.checkerframework.dataflow.cfg.node;
+
+import java.util.Collection;
+import java.util.LinkedList;
+
+import org.checkerframework.dataflow.util.HashCodeUtils;
+
+import org.checkerframework.javacutil.InternalUtils;
+
+import com.sun.source.tree.ArrayAccessTree;
+import com.sun.source.tree.Tree;
+
+/**
+ * A node for an array access:
+ *
+ * <pre>
+ *   <em>array ref</em> [ <em>index</em> ]
+ * </pre>
+ *
+ * We allow array accesses without corresponding AST {@link Tree}s.
+ *
+ * @author Stefan Heule
+ * @author Charlie Garrett
+ *
+ */
+
+public class ArrayAccessNode extends Node {
+
+    protected Tree tree;
+    protected Node array;
+    protected Node index;
+
+    public ArrayAccessNode(Tree t, Node array, Node index) {
+        super(InternalUtils.typeOf(t));
+        assert t instanceof ArrayAccessTree;
+        this.tree = t;
+        this.array = array;
+        this.index = index;
+    }
+
+    public Node getArray() {
+        return array;
+    }
+
+    public Node getIndex() {
+        return index;
+    }
+
+    @Override
+    public Tree getTree() {
+        return tree;
+    }
+
+    @Override
+    public <R, P> R accept(NodeVisitor<R, P> visitor, P p) {
+        return visitor.visitArrayAccess(this, p);
+    }
+
+    @Override
+    public String toString() {
+        String base = getArray().toString() + "[" + getIndex().toString() + "]";
+        return base;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || !(obj instanceof ArrayAccessNode)) {
+            return false;
+        }
+        ArrayAccessNode other = (ArrayAccessNode) obj;
+        return getArray().equals(other.getArray())
+                && getIndex().equals(other.getIndex());
+    }
+
+    @Override
+    public int hashCode() {
+        return HashCodeUtils.hash(getArray(), getIndex());
+    }
+
+    @Override
+    public Collection<Node> getOperands() {
+        LinkedList<Node> list = new LinkedList<Node>();
+        list.add(getArray());
+        list.add(getIndex());
+        return list;
+    }
+}