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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) 2000, 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.IConstantPool;
import org.aspectj.org.eclipse.jdt.core.util.IInnerClassesAttribute;
import org.aspectj.org.eclipse.jdt.core.util.IInnerClassesAttributeEntry;

/**
 * Default implementation of IInnerClassesAttribute.
 */
public class InnerClassesAttribute extends ClassFileAttribute implements IInnerClassesAttribute {
	private static final IInnerClassesAttributeEntry[] NO_ENTRIES = new IInnerClassesAttributeEntry[0];

	private final int numberOfClasses;
	private IInnerClassesAttributeEntry[] entries;
	/**
	 * Constructor for InnerClassesAttribute.
	 */
	public InnerClassesAttribute(
		byte[] classFileBytes,
		IConstantPool constantPool,
		int offset)
		throws ClassFormatException {
		super(classFileBytes, constantPool, offset);
		this.numberOfClasses = u2At(classFileBytes, 6, offset);
		final int length = this.numberOfClasses;
		if (length != 0) {
			int readOffset = 8;
			this.entries = new IInnerClassesAttributeEntry[length];
			for (int i = 0; i < length; i++) {
				this.entries[i] = new InnerClassesAttributeEntry(classFileBytes, constantPool, offset + readOffset);
				readOffset += 8;
			}
		} else {
			this.entries = NO_ENTRIES;
		}
	}

	/**
	 * @see IInnerClassesAttribute#getInnerClassAttributesEntries()
	 */
	@Override
	public IInnerClassesAttributeEntry[] getInnerClassAttributesEntries() {
		return this.entries;
	}

	/**
	 * @see IInnerClassesAttribute#getNumberOfClasses()
	 */
	@Override
	public int getNumberOfClasses() {
		return this.numberOfClasses;
	}

}