org.aspectj.apache.bcel.classfile.annotation.RuntimeAnnos Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of aspectjtools Show documentation

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.

There is a newer version: 1.9.22.1

Show newest version

/* *******************************************************************
 * Copyright (c) 2004, 2013 IBM, 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 java.util.ArrayList;
import java.util.List;

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

public abstract class RuntimeAnnos extends Attribute {

	private List annotations;
	private boolean visible;

	// Keep just a byte stream of the data until someone actually asks for it
	private boolean inflated = false;
	private byte[] annotation_data;

	public RuntimeAnnos(byte attrid, boolean visible, int nameIdx, int len, ConstantPool cpool) {
		super(attrid, nameIdx, len, cpool);
		this.visible = visible;
		annotations = new ArrayList<>();
	}

	public RuntimeAnnos(byte attrid, boolean visible, int nameIdx, int len, byte[] data, ConstantPool cpool) {
		super(attrid, nameIdx, len, cpool);
		this.visible = visible;
		annotations = new ArrayList<>();
		annotation_data = data;
	}

	public List getAnnotations() {
		if (!inflated)
			inflate();
		return annotations;
	}

	public boolean areVisible() {
		return visible;
	}

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

	protected void writeAnnotations(DataOutputStream dos) throws IOException {
		if (!inflated) {
			dos.write(annotation_data, 0, length);
		} else {
			dos.writeShort(annotations.size());
			for (AnnotationGen ann : annotations) {
				ann.dump(dos);
			}
		}
	}


	private void inflate() {
		try {
			DataInputStream dis = new DataInputStream(new ByteArrayInputStream(annotation_data));
			int numberOfAnnotations = dis.readUnsignedShort();
			if (numberOfAnnotations > 0) {
				List inflatedAnnotations = new ArrayList<>();
				for (int i = 0; i < numberOfAnnotations; i++) {
					inflatedAnnotations.add(AnnotationGen.read(dis, getConstantPool(), visible));
				}
				annotations = inflatedAnnotations;
			}
			dis.close();
			inflated = true;
		} catch (IOException ioe) {
			throw new RuntimeException("Unabled to inflate annotation data, badly formed? ");
		}
	}

	/** FOR TESTING ONLY: Tells you if the annotations have been inflated to an object graph */
	public boolean isInflated() {
		return inflated;
	}

}