1 files changed, 110 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/PackageNameNode.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/PackageNameNode.java
new file mode 100644
index 0000000000..3851126f44
--- /dev/null
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/PackageNameNode.java
@@ -0,0 +1,110 @@
+package org.checkerframework.dataflow.cfg.node;
+
+/*>>>
+import org.checkerframework.checker.nullness.qual.Nullable;
+*/
+
+import org.checkerframework.dataflow.util.HashCodeUtils;
+
+import org.checkerframework.javacutil.InternalUtils;
+import org.checkerframework.javacutil.TreeUtils;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import javax.lang.model.element.Element;
+
+import com.sun.source.tree.IdentifierTree;
+import com.sun.source.tree.MemberSelectTree;
+import com.sun.source.tree.Tree;
+
+/**
+ * A node representing a package name used in an expression such as a
+ * constructor invocation
+ *
+ * <p>
+ * <em>package</em>.class.object(...)
+ * <p>
+ * parent.<em>package</em>.class.object(...)
+ *
+ * @author Stefan Heule
+ * @author Charlie Garrett
+ *
+ */
+public class PackageNameNode extends Node {
+
+    protected final Tree tree;
+    /** The package named by this node */
+    protected final Element element;
+
+    /** The parent name, if any. */
+    protected final /*@Nullable*/ PackageNameNode parent;
+
+    public PackageNameNode(IdentifierTree tree) {
+        super(InternalUtils.typeOf(tree));
+        this.tree = tree;
+        this.element = TreeUtils.elementFromUse(tree);
+        this.parent = null;
+    }
+
+    public PackageNameNode(MemberSelectTree tree, PackageNameNode parent) {
+        super(InternalUtils.typeOf(tree));
+        this.tree = tree;
+        this.element = TreeUtils.elementFromUse(tree);
+        this.parent = parent;
+    }
+
+    public Element getElement() {
+        return element;
+    }
+
+    public PackageNameNode getParent() {
+        return parent;
+    }
+
+    @Override
+    public Tree getTree() {
+        return tree;
+    }
+
+    @Override
+    public <R, P> R accept(NodeVisitor<R, P> visitor, P p) {
+        return visitor.visitPackageName(this, p);
+    }
+
+    @Override
+    public String toString() {
+        return getElement().getSimpleName().toString();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || !(obj instanceof PackageNameNode)) {
+            return false;
+        }
+        PackageNameNode other = (PackageNameNode) obj;
+        if (getParent() == null) {
+            return other.getParent() == null
+                    && getElement().equals(other.getElement());
+        } else {
+            return getParent().equals(other.getParent())
+                    && getElement().equals(other.getElement());
+        }
+    }
+
+    @Override
+    public int hashCode() {
+        if (parent == null) {
+            return HashCodeUtils.hash(getElement());
+        }
+        return HashCodeUtils.hash(getElement(), getParent());
+    }
+
+    @Override
+    public Collection<Node> getOperands() {
+        if (parent == null) {
+            return Collections.emptyList();
+        }
+        return Collections.singleton((Node) parent);
+    }
+}