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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.attribute.annotation;

import proguard.classfile.*;
import proguard.classfile.attribute.annotation.visitor.ElementValueVisitor;
import proguard.classfile.visitor.*;

/**
 * This {@link ElementValue} represents an enumeration constant element value.
 *
 * @author Eric Lafortune
 */
public class EnumConstantElementValue extends ElementValue {
  public int u2typeNameIndex;
  public int u2constantNameIndex;

  /**
   * An extra field pointing to the Clazz objects referenced in the type name string. This field is
   * typically filled out by the {@link
   * proguard.classfile.util.ClassReferenceInitializer
   * ClassReferenceInitializer}. References to primitive types are ignored.
   */
  public Clazz[] referencedClasses;

  /**
   * An extra field optionally pointing to the referenced enum Field object. This field is typically
   * filled out by the {@link
   * proguard.classfile.util.ClassReferenceInitializer
   * ClassReferenceInitializer}.
   */
  public Field referencedField;

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

  /** Creates an initialized EnumConstantElementValue. */
  public EnumConstantElementValue(
      int u2elementNameIndex, int u2typeNameIndex, int u2constantNameIndex) {
    super(u2elementNameIndex);

    this.u2typeNameIndex = u2typeNameIndex;
    this.u2constantNameIndex = u2constantNameIndex;
  }

  /** Returns the enumeration type name. */
  public String getTypeName(Clazz clazz) {
    return clazz.getString(u2typeNameIndex);
  }

  /** Returns the constant name. */
  public String getConstantName(Clazz clazz) {
    return clazz.getString(u2constantNameIndex);
  }

  /** Applies the given visitor to all referenced classes. */
  public void referencedClassesAccept(ClassVisitor classVisitor) {
    if (referencedClasses != null) {
      for (int index = 0; index < referencedClasses.length; index++) {
        Clazz referencedClass = referencedClasses[index];
        if (referencedClass != null) {
          referencedClass.accept(classVisitor);
        }
      }
    }
  }

  /** Applies the given visitor to the referenced field. */
  public void referencedFieldAccept(MemberVisitor memberVisitor) {
    if (referencedField != null) {
      referencedField.accept(referencedClasses[0], memberVisitor);
    }
  }

  // Implementations for ElementValue.

  public char getTag() {
    return ElementValue.TAG_ENUM_CONSTANT;
  }

  public void accept(Clazz clazz, Annotation annotation, ElementValueVisitor elementValueVisitor) {
    elementValueVisitor.visitEnumConstantElementValue(clazz, annotation, this);
  }
}