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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;

import proguard.classfile.*;
import proguard.classfile.attribute.CodeAttribute;
import proguard.classfile.instruction.ConstantInstruction;
import proguard.evaluation.value.Value;

/**
 * This interface sets up the variables for entering a method, and it updates the stack for the
 * invocation of a class member.
 *
 * @author Eric Lafortune
 */
public interface InvocationUnit {
  /** Sets up the given variables for entering the given method. */
  public void enterMethod(Clazz clazz, Method method, Variables variables);

  /** Exits the given method with the given return value. */
  public void exitMethod(Clazz clazz, Method method, Value returnValue);

  /** Sets up the given stack for entering the given exception handler. */
  public void enterExceptionHandler(
      Clazz clazz,
      Method method,
      CodeAttribute codeAttribute,
      int offset,
      int catchType,
      Stack stack);

  /**
   * Updates the given stack corresponding to the execution of the given field or method reference
   * instruction.
   */
  public void invokeMember(
      Clazz clazz,
      Method method,
      CodeAttribute codeAttribute,
      int offset,
      ConstantInstruction constantInstruction,
      Stack stack,
      Variables variables);
}