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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 proguard.analysis.cpa.defaults.LatticeAbstractState;
import proguard.analysis.cpa.jvm.state.JvmAbstractState;

/**
 * The {@link JvmStaticFieldLocation} is a memory location corresponding to a public static field.
 *
 * @author Dmitry Ivanov
 */
public class JvmStaticFieldLocation extends JvmMemoryLocation {

  public final String fqn;

  /**
   * Create a static field location.
   *
   * @param fqn a fully qualified name
   */
  public JvmStaticFieldLocation(String fqn) {
    this.fqn = fqn;
  }

  // implementations for MemoryLocation

  @Override
  public  T extractValueOrDefault(
      JvmAbstractState abstractState, T defaultValue) {
    return (T) abstractState.getStaticOrDefault(fqn, defaultValue);
  }

  // implementations for Object

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

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

  @Override
  public String toString() {
    return "JvmStaticFieldLocation(" + fqn + ")";
  }
}