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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.classfile;

import proguard.classfile.attribute.Attribute;
import proguard.classfile.attribute.visitor.AttributeVisitor;
import proguard.classfile.visitor.*;

/**
 * This {@link Method} represents a method in a {@link ProgramClass}.
 *
 * @author Eric Lafortune
 */
public class ProgramMethod extends ProgramMember implements Method {
  private static final Attribute[] EMPTY_ATTRIBUTES = new Attribute[0];

  /**
   * An extra field containing all the classes referenced in the descriptor string. This field is
   * filled out by the {@link proguard.classfile.util.ClassReferenceInitializer
   * ClassReferenceInitializer}. The size of the array is the number of classes in the descriptor.
   * Primitive types and arrays of primitive types are ignored. Unknown classes are represented as
   * null values.
   */
  public Clazz[] referencedClasses;

  /** Creates an uninitialized ProgramMethod. */
  public ProgramMethod() {}

  /** Creates an initialized ProgramMethod without attributes. */
  public ProgramMethod(
      int u2accessFlags, int u2nameIndex, int u2descriptorIndex, Clazz[] referencedClasses) {
    this(u2accessFlags, u2nameIndex, u2descriptorIndex, referencedClasses, 0, null);
  }

  /** Creates an initialized ProgramMethod without attributes. */
  public ProgramMethod(
      int u2accessFlags,
      int u2nameIndex,
      int u2descriptorIndex,
      Clazz[] referencedClasses,
      int processingFlags,
      Object processingInfo) {
    this(
        u2accessFlags,
        u2nameIndex,
        u2descriptorIndex,
        0,
        EMPTY_ATTRIBUTES,
        referencedClasses,
        processingFlags,
        processingInfo);
  }

  /** Creates an initialized ProgramMethod. */
  public ProgramMethod(
      int u2accessFlags,
      int u2nameIndex,
      int u2descriptorIndex,
      int u2attributesCount,
      Attribute[] attributes,
      Clazz[] referencedClasses) {
    this(
        u2accessFlags,
        u2nameIndex,
        u2descriptorIndex,
        u2attributesCount,
        attributes,
        referencedClasses,
        0,
        null);
  }

  /** Creates an initialized ProgramMethod. */
  public ProgramMethod(
      int u2accessFlags,
      int u2nameIndex,
      int u2descriptorIndex,
      int u2attributesCount,
      Attribute[] attributes,
      Clazz[] referencedClasses,
      int processingFlags,
      Object processingInfo) {
    super(
        u2accessFlags,
        u2nameIndex,
        u2descriptorIndex,
        u2attributesCount,
        attributes,
        processingFlags,
        processingInfo);

    this.referencedClasses = referencedClasses;
  }

  // Implementations for ProgramMember.

  public void accept(ProgramClass programClass, MemberVisitor memberVisitor) {
    memberVisitor.visitProgramMethod(programClass, this);
  }

  public void attributesAccept(ProgramClass programClass, AttributeVisitor attributeVisitor) {
    for (int index = 0; index < u2attributesCount; index++) {
      attributes[index].accept(programClass, this, attributeVisitor);
    }
  }

  // Implementations for Member.

  public void referencedClassesAccept(ClassVisitor classVisitor) {
    if (referencedClasses != null) {
      for (int index = 0; index < referencedClasses.length; index++) {
        if (referencedClasses[index] != null) {
          referencedClasses[index].accept(classVisitor);
        }
      }
    }
  }
}