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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.

package aj.org.objectweb.asm.commons;

import aj.org.objectweb.asm.Attribute;
import aj.org.objectweb.asm.ByteVector;
import aj.org.objectweb.asm.ClassReader;
import aj.org.objectweb.asm.ClassWriter;
import aj.org.objectweb.asm.Label;

/**
 * A ModuleTarget attribute. This attribute is specific to the OpenJDK and may change in the future.
 *
 * @author Remi Forax
 */
public final class ModuleTargetAttribute extends Attribute {

  /** The name of the platform on which the module can run. */
  public String platform;

  /**
   * Constructs a new {@link ModuleTargetAttribute}.
   *
   * @param platform the name of the platform on which the module can run.
   */
  public ModuleTargetAttribute(final String platform) {
    super("ModuleTarget");
    this.platform = platform;
  }

  /**
   * Constructs an empty {@link ModuleTargetAttribute}. This object can be passed as a prototype to
   * the {@link ClassReader#accept(aj.org.objectweb.asm.ClassVisitor, Attribute[], int)} method.
   */
  public ModuleTargetAttribute() {
    this(null);
  }

  @Override
  protected Attribute read(
      final ClassReader classReader,
      final int offset,
      final int length,
      final char[] charBuffer,
      final int codeOffset,
      final Label[] labels) {
    return new ModuleTargetAttribute(classReader.readUTF8(offset, charBuffer));
  }

  @Override
  protected ByteVector write(
      final ClassWriter classWriter,
      final byte[] code,
      final int codeLength,
      final int maxStack,
      final int maxLocals) {
    ByteVector byteVector = new ByteVector();
    byteVector.putShort(platform == null ? 0 : classWriter.newUTF8(platform));
    return byteVector;
  }
}