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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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/*******************************************************************************
 * Copyright (c) 2012, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *        Andy Clement - Contributions for
 *                          Bug 383624 - [1.8][compiler] Revive code generation support for type annotations (from Olivier's work)
 *******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.core.util;

import org.aspectj.org.eclipse.jdt.core.util.ClassFormatException;
import org.aspectj.org.eclipse.jdt.core.util.IConstantPool;
import org.aspectj.org.eclipse.jdt.core.util.IExtendedAnnotation;
import org.aspectj.org.eclipse.jdt.core.util.IRuntimeVisibleTypeAnnotationsAttribute;

/**
 * Default implementation of IRuntimeVisibleTypeAnnotations
 */
public class RuntimeVisibleTypeAnnotationsAttribute
	extends ClassFileAttribute
	implements IRuntimeVisibleTypeAnnotationsAttribute {

	private static final IExtendedAnnotation[] NO_ENTRIES = new IExtendedAnnotation[0];
	private int extendedAnnotationsNumber;
	private IExtendedAnnotation[] extendedAnnotations;

	/**
	 * Constructor for RuntimeVisibleTypeAnnotations.
	 * @param classFileBytes
	 * @param constantPool
	 * @param offset
	 * @throws ClassFormatException
	 */
	public RuntimeVisibleTypeAnnotationsAttribute(
			byte[] classFileBytes,
			IConstantPool constantPool,
			int offset) throws ClassFormatException {
		super(classFileBytes, constantPool, offset);
		final int length = u2At(classFileBytes, 6, offset);
		this.extendedAnnotationsNumber = length;
		if (length != 0) {
			int readOffset = 8;
			this.extendedAnnotations = new IExtendedAnnotation[length];
			for (int i = 0; i < length; i++) {
				ExtendedAnnotation extendedAnnotation = new ExtendedAnnotation(classFileBytes, constantPool, offset + readOffset);
				this.extendedAnnotations[i] = extendedAnnotation;
				readOffset += extendedAnnotation.sizeInBytes();
			}
		} else {
			this.extendedAnnotations = NO_ENTRIES;
		}
	}

	@Override
	public IExtendedAnnotation[] getExtendedAnnotations() {
		return this.extendedAnnotations;
	}

	@Override
	public int getExtendedAnnotationsNumber() {
		return this.extendedAnnotationsNumber;
	}
}