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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) 2004, 2009 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
 *******************************************************************************/
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.IAnnotation;
import org.aspectj.org.eclipse.jdt.core.util.IConstantPool;
import org.aspectj.org.eclipse.jdt.core.util.IParameterAnnotation;

/**
 * Default implementation of IParameterAnnotation
 */
public class ParameterAnnotation extends ClassFileStruct implements IParameterAnnotation {

	private static final IAnnotation[] NO_ENTRIES = new IAnnotation[0];

	private final int annotationsNumber;
	private IAnnotation[] annotations;
	private int readOffset;

	/**
	 * Constructor for Annotation.
	 */
	public ParameterAnnotation(
			byte[] classFileBytes,
			IConstantPool constantPool,
			int offset) throws ClassFormatException {

		final int length = u2At(classFileBytes, 0, offset);
		this.readOffset = 2;
		this.annotationsNumber = length;
		if (length != 0) {
			this.annotations = new IAnnotation[length];
			for (int i = 0; i < length; i++) {
				Annotation annotation = new Annotation(classFileBytes, constantPool, offset + this.readOffset);
				this.annotations[i] = annotation;
				this.readOffset += annotation.sizeInBytes();
			}
		} else {
			this.annotations = NO_ENTRIES;
		}
	}

	int sizeInBytes() {
		return this.readOffset;
	}

	@Override
	public IAnnotation[] getAnnotations() {
		return this.annotations;
	}

	@Override
	public int getAnnotationsNumber() {
		return this.annotationsNumber;
	}
}