proguard.classfile.attribute.annotation.Annotation 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) 2002-2020 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.Clazz;
import proguard.classfile.attribute.annotation.visitor.ElementValueVisitor;
import proguard.classfile.visitor.ClassVisitor;
import proguard.util.SimpleProcessable;

/**
 * Representation of an annotation.
 *
 * @author Eric Lafortune
 */
public class Annotation extends SimpleProcessable {
  public int u2typeIndex;
  public int u2elementValuesCount;
  public ElementValue[] elementValues;

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

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

  /** Creates an initialized Annotation. */
  public Annotation(int u2typeIndex, int u2elementValuesCount, ElementValue[] elementValues) {
    this.u2typeIndex = u2typeIndex;
    this.u2elementValuesCount = u2elementValuesCount;
    this.elementValues = elementValues;
  }

  /** Returns the type. */
  public String getType(Clazz clazz) {
    return clazz.getString(u2typeIndex);
  }

  /** Applies the given visitor to the first referenced class. This is the main annotation class. */
  public void referencedClassAccept(ClassVisitor classVisitor) {
    if (referencedClasses != null) {
      Clazz referencedClass = referencedClasses[0];
      if (referencedClass != null) {
        referencedClass.accept(classVisitor);
      }
    }
  }

  /** 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 specified element value pair. */
  public void elementValueAccept(Clazz clazz, int index, ElementValueVisitor elementValueVisitor) {
    elementValues[index].accept(clazz, this, elementValueVisitor);
  }

  /** Applies the given visitor to all element value pairs. */
  public void elementValuesAccept(Clazz clazz, ElementValueVisitor elementValueVisitor) {
    for (int index = 0; index < u2elementValuesCount; index++) {
      elementValues[index].accept(clazz, this, elementValueVisitor);
    }
  }
}