src/keepanno/java/com/android/tools/r8/keepanno/ast/KeepDeclaration.java

// Copyright (c) 2023, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.keepanno.ast;

import java.util.function.Consumer;
import java.util.function.Function;

/** Base class for the declarations represented in the keep annoations library. */
public abstract class KeepDeclaration {

  public abstract KeepEdgeMetaInfo getMetaInfo();

  public final <T> T apply(Function<KeepEdge, T> onEdge, Function<KeepCheck, T> onCheck) {
    if (isKeepEdge()) {
      return onEdge.apply(asKeepEdge());
    }
    return onCheck.apply(asKeepCheck());
  }

  public final void match(Consumer<KeepEdge> onEdge, Consumer<KeepCheck> onCheck) {
    apply(AstUtils.toVoidFunction(onEdge), AstUtils.toVoidFunction(onCheck));
  }

  public final boolean isKeepEdge() {
    return asKeepEdge() != null;
  }

  public KeepEdge asKeepEdge() {
    return null;
  }

  public final boolean isKeepCheck() {
    return asKeepCheck() != null;
  }

  public KeepCheck asKeepCheck() {
    return null;
  }

  @Override
  public final boolean equals(Object obj) {
    throw new RuntimeException();
  }

  @Override
  public final int hashCode() {
    throw new RuntimeException();
  }
}