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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 IBM Corporation and others.
 * 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:
 *     IBM Corporation
 *******************************************************************************/
package org.aspectj.ajdt.internal.compiler.ast;

import java.util.ArrayList;
import java.util.List;

import org.aspectj.org.eclipse.jdt.internal.compiler.ClassFile;
import org.aspectj.org.eclipse.jdt.internal.compiler.CompilationResult;
import org.aspectj.org.eclipse.jdt.internal.compiler.IAttribute;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
import org.aspectj.org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.aspectj.weaver.AjAttribute;

/**
 * Root class for all MethodDeclaration objects created by the parser.
 * Enables us to generate extra attributes in the method_info attribute
 * to support aspectj.
 *
 */
public class AjMethodDeclaration extends MethodDeclaration {

	private List attributes = null;

	/**
	 * @param compilationResult
	 */
	public AjMethodDeclaration(CompilationResult compilationResult) {
		super(compilationResult);
	}

	// general purpose hook to add an AjAttribute to this method
	// used by @AspectJ visitor to add pointcut attribute to @Advice
	protected void addAttribute(EclipseAttributeAdapter eaa) {
		if (attributes==null) attributes = new ArrayList<>();
		attributes.add(eaa);
	}

	/**
	 * Overridden to add extra AJ stuff, also adds synthetic if boolean is true.
	 */
	protected int generateInfoAttributes(ClassFile classFile,boolean addAjSynthetic) {
		// add extra attributes into list then call 2-arg version of generateInfoAttributes...
		List extras = (attributes==null?new ArrayList<>():attributes);
		addDeclarationStartLineAttribute(extras,classFile);
		if (addAjSynthetic) {
			extras.add(new EclipseAttributeAdapter(new AjAttribute.AjSynthetic()));
		}
		return classFile.generateMethodInfoAttributes(binding,extras);
	}

	@Override
	protected int generateInfoAttributes(ClassFile classFile) {
	    return generateInfoAttributes(classFile,false);
	}

	protected void addDeclarationStartLineAttribute(List extraAttributeList, ClassFile classFile) {
		if ((classFile.codeStream.generateAttributes & ClassFileConstants.ATTR_LINES)==0) return;

		int[] separators = compilationResult().lineSeparatorPositions;
		int declarationStartLine = 1;
		for (int separator : separators) {
			if (sourceStart < separator) break;
			declarationStartLine++;
		}

		extraAttributeList.add(
				new EclipseAttributeAdapter(new AjAttribute.MethodDeclarationLineNumberAttribute(declarationStartLine, this.sourceStart())));
	}
}