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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) 2002-2020 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;

/**
 * Representation of a value that has been tagged with a sticky trace value.
 *
 * @author Eric Lafortune
 */
public class TracingValue extends Value {
  private Value traceValue;
  private Value value;

  /** Creates a new TracingValue with the given trace value and value. */
  public TracingValue(Value traceValue, Value value) {
    this.traceValue = traceValue;
    this.value = value;
  }

  /** Returns the generalization of this TracingValue and the given other TracingValue. */
  public final TracingValue generalize(TracingValue other) {
    return this.equals(other)
        ? this
        : new TracingValue(
            this.traceValue.generalize(other.traceValue), this.value.generalize(other.value));
  }

  // Implementations for Value.

  public Category1Value category1Value() {
    return value.category1Value();
  }

  public Category2Value category2Value() {
    return value.category2Value();
  }

  public IntegerValue integerValue() {
    return value.integerValue();
  }

  public LongValue longValue() {
    return value.longValue();
  }

  public FloatValue floatValue() {
    return value.floatValue();
  }

  public DoubleValue doubleValue() {
    return value.doubleValue();
  }

  public ReferenceValue referenceValue() {
    return value.referenceValue();
  }

  public final InstructionOffsetValue instructionOffsetValue() {
    return value.instructionOffsetValue();
  }

  public boolean isSpecific() {
    return value.isSpecific();
  }

  public boolean isParticular() {
    return value.isParticular();
  }

  public final Value generalize(Value other) {
    return other instanceof TracingValue
        ? generalize((TracingValue) other)
        : value.equals(other) ? this : new TracingValue(traceValue, value.generalize(other));
  }

  public boolean isCategory2() {
    return value.isCategory2();
  }

  public final int computationalType() {
    return value.computationalType();
  }

  public final String internalType() {
    return value.internalType();
  }

  // Implementations for Object.

  public boolean equals(Object object) {
    if (object == null || this.getClass() != object.getClass()) {
      return false;
    }

    TracingValue other = (TracingValue) object;
    return this.traceValue.equals(other.traceValue) && this.value.equals(other.value);
  }

  public int hashCode() {
    return this.getClass().hashCode() ^ traceValue.hashCode() ^ value.hashCode();
  }

  public String toString() {
    return 'P' + traceValue.toString() + value.toString();
  }
}