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The AspectJ weaver introduces advices to java classes
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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.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.World;
import org.aspectj.weaver.ast.Literal;
import org.aspectj.weaver.ast.Test;

public class WithincodePointcut extends Pointcut {
	private SignaturePattern signature;
	private static final int matchedShadowKinds;
	static {
		int flags = Shadow.ALL_SHADOW_KINDS_BITS;
		for (int i = 0; i < Shadow.SHADOW_KINDS.length; i++) {
			if (Shadow.SHADOW_KINDS[i].isEnclosingKind()) {
				flags -= Shadow.SHADOW_KINDS[i].bit;
			}
		}
		// these next two are needed for inlining of field initializers
		flags |= Shadow.ConstructorExecution.bit;
		flags |= Shadow.Initialization.bit;
		matchedShadowKinds = flags;
	}

	public WithincodePointcut(SignaturePattern signature) {
		this.signature = signature;
		this.pointcutKind = WITHINCODE;
	}

	public SignaturePattern getSignature() {
		return signature;
	}

	public int couldMatchKinds() {
		return matchedShadowKinds;
	}

	public Pointcut parameterizeWith(Map typeVariableMap, World w) {
		WithincodePointcut ret = new WithincodePointcut(signature.parameterizeWith(typeVariableMap, w));
		ret.copyLocationFrom(this);
		return ret;
	}

	public FuzzyBoolean fastMatch(FastMatchInfo type) {
		return FuzzyBoolean.MAYBE;
	}

	protected FuzzyBoolean matchInternal(Shadow shadow) {
		// This will not match code in local or anonymous classes as if
		// they were withincode of the outer signature
		return FuzzyBoolean.fromBoolean(signature.matches(shadow.getEnclosingCodeSignature(), shadow.getIWorld(), false));
	}

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

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

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

		// look for inappropriate use of parameterized types and tell user...
		HasThisTypePatternTriedToSneakInSomeGenericOrParameterizedTypePatternMatchingStuffAnywhereVisitor visitor = new HasThisTypePatternTriedToSneakInSomeGenericOrParameterizedTypePatternMatchingStuffAnywhereVisitor();
		signature.getDeclaringType().traverse(visitor, null);
		if (visitor.wellHasItThen/* ? */()) {
			scope.message(MessageUtil.error(WeaverMessages
					.format(WeaverMessages.WITHINCODE_DOESNT_SUPPORT_PARAMETERIZED_DECLARING_TYPES), getSourceLocation()));
		}

		visitor = new HasThisTypePatternTriedToSneakInSomeGenericOrParameterizedTypePatternMatchingStuffAnywhereVisitor();
		signature.getThrowsPattern().traverse(visitor, null);
		if (visitor.wellHasItThen/* ? */()) {
			scope.message(MessageUtil.error(WeaverMessages.format(WeaverMessages.NO_GENERIC_THROWABLES), getSourceLocation()));
		}
	}

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

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

	public int hashCode() {
		int result = 43;
		result = 37 * result + signature.hashCode();
		return result;
	}

	public String toString() {
		return "withincode(" + signature + ")";
	}

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