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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.bridge.ISourceLocation;
import org.aspectj.bridge.MessageUtil;
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.VersionedDataInputStream;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.World;
import org.aspectj.weaver.ast.Literal;
import org.aspectj.weaver.ast.Test;

public class WithinPointcut extends Pointcut {
	private TypePattern typePattern;

	public WithinPointcut(TypePattern type) {
		this.typePattern = type;
		this.pointcutKind = WITHIN;
	}

	public TypePattern getTypePattern() {
		return typePattern;
	}

	private FuzzyBoolean isWithinType(ResolvedType type) {
		while (type != null) {
			if (typePattern.matchesStatically(type)) {
				return FuzzyBoolean.YES;
			}
			type = type.getDeclaringType();
		}
		return FuzzyBoolean.NO;
	}

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

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

	public FuzzyBoolean fastMatch(FastMatchInfo info) {
		if (typePattern.annotationPattern instanceof AnyAnnotationTypePattern) {
			return isWithinType(info.getType());
		}
        return FuzzyBoolean.MAYBE;
        // Possible alternative implementation that fast matches even annotation patterns: '@Foo *'
//		typePattern.resolve(info.world);
//		return isWithinType(info.getType());
	}

	protected FuzzyBoolean matchInternal(Shadow shadow) {
		ResolvedType enclosingType = shadow.getIWorld().resolve(shadow.getEnclosingType(), true);
		if (enclosingType.isMissing()) {
			shadow.getIWorld().getLint().cantFindType.signal(new String[] { WeaverMessages.format(
					WeaverMessages.CANT_FIND_TYPE_WITHINPCD, shadow.getEnclosingType().getName()) }, shadow.getSourceLocation(),
					new ISourceLocation[] { getSourceLocation() });
		}
		typePattern.resolve(shadow.getIWorld());
		return isWithinType(enclosingType);
	}

	public void write(CompressingDataOutputStream s) throws IOException {
		s.writeByte(Pointcut.WITHIN);
		typePattern.write(s);
		writeLocation(s);
	}

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

	public void resolveBindings(IScope scope, Bindings bindings) {
		typePattern = typePattern.resolveBindings(scope, bindings, false, false);

		// look for parameterized type patterns which are not supported...
		HasThisTypePatternTriedToSneakInSomeGenericOrParameterizedTypePatternMatchingStuffAnywhereVisitor visitor = new HasThisTypePatternTriedToSneakInSomeGenericOrParameterizedTypePatternMatchingStuffAnywhereVisitor();
		typePattern.traverse(visitor, null);
		if (visitor.wellHasItThen/* ? */()) {
			scope.message(MessageUtil.error(WeaverMessages.format(WeaverMessages.WITHIN_PCD_DOESNT_SUPPORT_PARAMETERS),
					getSourceLocation()));
		}
	}

	public void postRead(ResolvedType enclosingType) {
		typePattern.postRead(enclosingType);
	}

	public boolean couldEverMatchSameJoinPointsAs(WithinPointcut other) {
		return typePattern.couldEverMatchSameTypesAs(other.typePattern);
	}

	public boolean equals(Object other) {
		if (!(other instanceof WithinPointcut)) {
			return false;
		}
		WithinPointcut o = (WithinPointcut) other;
		return o.typePattern.equals(this.typePattern);
	}

	public int hashCode() {
		return typePattern.hashCode();
	}

	public String toString() {
		return "within(" + typePattern + ")";
	}

	protected Test findResidueInternal(Shadow shadow, ExposedState state) {
		return match(shadow).alwaysTrue() ? Literal.TRUE : Literal.FALSE;
	}

	public Pointcut concretize1(ResolvedType inAspect, ResolvedType declaringType, IntMap bindings) {
		Pointcut ret = new WithinPointcut(typePattern);
		ret.copyLocationFrom(this);
		return ret;
	}

	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.typePattern != null)
			this.typePattern.traverse(visitor, ret);
		return ret;
	}
}