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ProGuardCORE is a free library to read, analyze, modify, and write Java class files.

There is a newer version: 9.1.6

/*
 * ProGuardCORE -- library to process Java bytecode.
 *
 * Copyright (c) 2002-2023 Guardsquare NV
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package proguard.evaluation.value;

/** Represents a value that is completely unknown. */
public class UnknownValue extends Value {
  UnknownValue() {}

  @Override
  public Value generalize(Value other) {
    return this;
  }

  @Override
  public boolean isCategory2() {
    return false;
  }

  @Override
  public int computationalType() {
    return Value.TYPE_UNKNOWN;
  }

  @Override
  public String internalType() {
    return null;
  }

  @Override
  public int hashCode() {
    return super.hashCode();
  }

  @Override
  public boolean equals(Object o) {
    return o instanceof UnknownValue;
  }

  @Override
  public String toString() {
    return "UNKNOWN";
  }
}