1 files changed, 80 insertions, 0 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/ValueLiteralNode.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/ValueLiteralNode.java
new file mode 100644
index 0000000000..75d18ea8f7
--- /dev/null
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/cfg/node/ValueLiteralNode.java
@@ -0,0 +1,80 @@
+package org.checkerframework.dataflow.cfg.node;
+
+import org.checkerframework.dataflow.util.HashCodeUtils;
+
+import org.checkerframework.javacutil.InternalUtils;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import com.sun.source.tree.LiteralTree;
+
+/*>>>
+import org.checkerframework.checker.nullness.qual.Nullable;
+*/
+
+/**
+ * A node for a literals that have some form of value:
+ * <ul>
+ * <li>integer literal</li>
+ * <li>long literal</li>
+ * <li>char literal</li>
+ * <li>string literal</li>
+ * <li>float literal</li>
+ * <li>double literal</li>
+ * <li>boolean literal</li>
+ * <li>null literal</li>
+ * </ul>
+ *
+ * @author Stefan Heule
+ *
+ */
+public abstract class ValueLiteralNode extends Node {
+
+    protected final LiteralTree tree;
+
+    /**
+     * @return the value of the literal
+     */
+    abstract public /*@Nullable*/ Object getValue();
+
+    public ValueLiteralNode(LiteralTree tree) {
+        super(InternalUtils.typeOf(tree));
+        this.tree = tree;
+    }
+
+    @Override
+    public LiteralTree getTree() {
+        return tree;
+    }
+
+    @Override
+    public String toString() {
+        return String.valueOf(getValue());
+    }
+
+    /**
+     * Compare the value of this nodes.
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || !(obj instanceof ValueLiteralNode)) {
+            return false;
+        }
+        ValueLiteralNode other = (ValueLiteralNode) obj;
+        Object val = getValue();
+        Object otherVal = other.getValue();
+        return ((val == null || otherVal == null) && val == otherVal) || val.equals(otherVal);
+    }
+
+    @Override
+    public int hashCode() {
+        return HashCodeUtils.hash(getValue());
+    }
+
+    @Override
+    public Collection<Node> getOperands() {
+        return Collections.emptyList();
+    }
+
+}