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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) 2013 VMware
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *     Andy Clement -     initial implementation {date}
 * ******************************************************************/
package org.aspectj.apache.bcel.classfile.annotation;

import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import org.aspectj.apache.bcel.classfile.Attribute;
import org.aspectj.apache.bcel.classfile.ConstantPool;

public abstract class RuntimeTypeAnnos extends Attribute {

	private boolean visible;
	private TypeAnnotationGen[] typeAnnotations; // null until inflated

	// Keep just a byte stream of the data until someone actually asks for the information within
	private byte[] annotation_data;

	public RuntimeTypeAnnos(byte attrid, boolean visible, int nameIdx, int len, ConstantPool cpool) {
		super(attrid,nameIdx,len,cpool);
		this.visible = visible;
	}

	protected void readTypeAnnotations(DataInputStream dis,ConstantPool cpool) throws IOException {
		annotation_data = new byte[length];
		dis.readFully(annotation_data,0,length);
	}

	public final void dump(DataOutputStream dos) throws IOException {
	  super.dump(dos);
	  writeTypeAnnotations(dos);
	}

	protected void writeTypeAnnotations(DataOutputStream dos) throws IOException {
		if (typeAnnotations == null) {
			dos.write(annotation_data,0,length);
		} else {
			dos.writeShort(typeAnnotations.length);
			for (TypeAnnotationGen typeAnnotation : typeAnnotations) {
				typeAnnotation.dump(dos);
			}
		}
	}

//	public RuntimeTypeAnnos(byte attrid,boolean visible,int nameIdx,int len,byte[] data,ConstantPool cpool) {
//		super(attrid,nameIdx,len,cpool);
//		this.visible = visible;
//		parameterAnnotations = new ArrayList();
//		annotation_data = data;
//	}

	public Attribute copy(ConstantPool constant_pool) {
	  	throw new RuntimeException("Not implemented yet!");
	}

	public TypeAnnotationGen[] getTypeAnnotations() {
		ensureInflated();
		return typeAnnotations;
	}


	public boolean areVisible() {
		return visible;
	}

	private void ensureInflated() {
		if (typeAnnotations !=null) {
			return;
		}
		try {
			DataInputStream dis = new DataInputStream(new ByteArrayInputStream(annotation_data));
			int numTypeAnnotations = dis.readUnsignedShort();
			if (numTypeAnnotations == 0) {
				typeAnnotations = TypeAnnotationGen.NO_TYPE_ANNOTATIONS;
			} else {
				typeAnnotations = new TypeAnnotationGen[numTypeAnnotations];
				for (int i=0; i