package org.checkerframework.dataflow.cfg.node;

import com.sun.source.tree.IdentifierTree;
import com.sun.source.tree.Tree;
import java.util.Collection;
import java.util.Collections;
import java.util.Objects;
import org.checkerframework.checker.nullness.qual.Nullable;
import org.checkerframework.javacutil.TreeUtils;

/**
 * A node for a reference to 'super'.
 *
 * <pre>
 *   <em>super</em>
 * </pre>
 */
public class SuperNode extends Node {

  protected final Tree tree;

  public SuperNode(Tree t) {
    super(TreeUtils.typeOf(t));
    assert t instanceof IdentifierTree && ((IdentifierTree) t).getName().contentEquals("super");
    tree = t;
  }

  @Override
  public Tree getTree() {
    return tree;
  }

  @Override
  public <R, P> R accept(NodeVisitor<R, P> visitor, P p) {
    return visitor.visitSuper(this, p);
  }

  public String getName() {
    return "super";
  }

  @Override
  public String toString() {
    return getName();
  }

  @Override
  public boolean equals(@Nullable Object obj) {
    return obj instanceof SuperNode;
  }

  @Override
  public int hashCode() {
    return Objects.hash(getName());
  }

  @Override
  public Collection<Node> getOperands() {
    return Collections.emptyList();
  }
}