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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) 2002 Palo Alto Research Center, Incorporated (PARC).
 * 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:
 *     PARC     initial implementation
 * ******************************************************************/

package org.aspectj.weaver.patterns;

import java.io.IOException;
import java.util.Map;

import org.aspectj.util.FuzzyBoolean;
import org.aspectj.weaver.CompressingDataOutputStream;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.IntMap;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.Shadow;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.World;
import org.aspectj.weaver.ast.Test;

public class NotPointcut extends Pointcut {
	private Pointcut body;

	public NotPointcut(Pointcut negated) {
		super();
		this.body = negated;
		this.pointcutKind = NOT;
		setLocation(negated.getSourceContext(), negated.getStart(), negated.getEnd()); // should that be at least start-1?
	}

	public NotPointcut(Pointcut pointcut, int startPos) {
		this(pointcut);
		setLocation(pointcut.getSourceContext(), startPos, pointcut.getEnd());
	}

	@Override
	public int couldMatchKinds() {
		return Shadow.ALL_SHADOW_KINDS_BITS;
	}

	public Pointcut getNegatedPointcut() {
		return body;
	}

	@Override
	public FuzzyBoolean fastMatch(FastMatchInfo type) {
		return body.fastMatch(type).not();
	}

	@Override
	protected FuzzyBoolean matchInternal(Shadow shadow) {
		return body.match(shadow).not();
	}

	@Override
	public String toString() {
		return "!" + body.toString();

	}

	@Override
	public boolean equals(Object other) {
		if (!(other instanceof NotPointcut)) {
			return false;
		}
		NotPointcut o = (NotPointcut) other;
		return o.body.equals(body);
	}

	@Override
	public int hashCode() {
		return 37 * 23 + body.hashCode();
	}

	@Override
	public void resolveBindings(IScope scope, Bindings bindings) {
		// Bindings old = bindings.copy();

		// Bindings newBindings = new Bindings(bindings.size());

		body.resolveBindings(scope, null);

		// newBindings.checkEmpty(scope, "negation does not allow binding");
		// bindings.checkEquals(old, scope);

	}

	@Override
	public void write(CompressingDataOutputStream s) throws IOException {
		s.writeByte(Pointcut.NOT);
		body.write(s);
		writeLocation(s);
	}

	public static Pointcut read(VersionedDataInputStream s, ISourceContext context) throws IOException {
		NotPointcut ret = new NotPointcut(Pointcut.read(s, context));
		ret.readLocation(context, s);
		return ret;
	}

	@Override
	protected Test findResidueInternal(Shadow shadow, ExposedState state) {
		return Test.makeNot(body.findResidue(shadow, state));
	}

	@Override
	public Pointcut concretize1(ResolvedType inAspect, ResolvedType declaringType, IntMap bindings) {
		Pointcut ret = new NotPointcut(body.concretize(inAspect, declaringType, bindings));
		ret.copyLocationFrom(this);
		return ret;
	}

	@Override
	public Pointcut parameterizeWith(Map typeVariableMap, World w) {
		Pointcut ret = new NotPointcut(body.parameterizeWith(typeVariableMap, w));
		ret.copyLocationFrom(this);
		return ret;
	}

	@Override
	public Object accept(PatternNodeVisitor visitor, Object data) {
		return visitor.visit(this, data);
	}

	@Override
	public Object traverse(PatternNodeVisitor visitor, Object data) {
		Object ret = accept(visitor, data);
		if (this.body != null)
			this.body.traverse(visitor, ret);
		return ret;
	}

}