proguard.analysis.cpa.jvm.witness.JvmLocalVariableLocation Maven / Gradle / Ivy

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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) 2002-2022 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.analysis.cpa.jvm.witness;

import java.util.Objects;
import proguard.analysis.cpa.defaults.LatticeAbstractState;
import proguard.analysis.cpa.jvm.state.JvmAbstractState;

/** The {@link JvmLocalVariableLocation} is a memory location at the local variable array. */
public class JvmLocalVariableLocation extends JvmMemoryLocation {

  public final int index;

  /**
   * Create a local variable location.
   *
   * @param index a position at the local variable array
   */
  public JvmLocalVariableLocation(int index) {
    this.index = index;
  }

  // implementations for MemoryLocation

  @Override
  public > T extractValueOrDefault(
      JvmAbstractState jvmState, T defaultValue) {
    return jvmState.getVariableOrDefault(index, defaultValue);
  }

  // implementations for Object

  @Override
  public boolean equals(Object obj) {
    if (!(obj instanceof JvmLocalVariableLocation)) {
      return false;
    }
    JvmLocalVariableLocation other = (JvmLocalVariableLocation) obj;
    return index == other.index;
  }

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

  @Override
  public String toString() {
    return "JvmLocalVariableLocation(" + index + ")";
  }
}