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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) 2005 IBM, Contributors.
 * 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
 * ******************************************************************/

package org.aspectj.weaver;

import java.io.IOException;

import org.aspectj.util.FuzzyBoolean;
import org.aspectj.weaver.patterns.PerTypeWithin;
import org.aspectj.weaver.patterns.Pointcut;

// PTWIMPL Target type munger adds the localAspectOf() method
public class PerTypeWithinTargetTypeMunger extends ResolvedTypeMunger {
	private UnresolvedType aspectType;
	private PerTypeWithin testPointcut;

	public PerTypeWithinTargetTypeMunger(UnresolvedType aspectType, PerTypeWithin testPointcut) {
		super(PerTypeWithinInterface, null);
		this.aspectType = aspectType;
		this.testPointcut = testPointcut;
	}

	@Override
	public boolean equals(Object other) {
		if (!(other instanceof PerTypeWithinTargetTypeMunger)) {
			return false;
		}
		PerTypeWithinTargetTypeMunger o = (PerTypeWithinTargetTypeMunger) other;
		return ((o.testPointcut == null) ? (testPointcut == null) : testPointcut.equals(o.testPointcut))
				&& ((o.aspectType == null) ? (aspectType == null) : aspectType.equals(o.aspectType));
	}

	private volatile int hashCode = 0;

	@Override
	public int hashCode() {
		if (hashCode == 0) {
			int result = 17;
			result = 37 * result + ((testPointcut == null) ? 0 : testPointcut.hashCode());
			result = 37 * result + ((aspectType == null) ? 0 : aspectType.hashCode());
			hashCode = result;
		}
		return hashCode;
	}

	@Override
	public void write(CompressingDataOutputStream s) throws IOException {
		throw new RuntimeException("shouldn't be serialized");
	}

	public UnresolvedType getAspectType() {
		return aspectType;
	}

	public Pointcut getTestPointcut() {
		return testPointcut;
	}

	// This is a lexical within() so if you say PerTypeWithin(Test) and matchType is an
	// inner type (e.g. Test$NestedType) then it should match successfully
	// Does not match if the target is an interface
	@Override
	public boolean matches(ResolvedType matchType, ResolvedType aspectType) {
		return isWithinType(matchType).alwaysTrue() && !matchType.isInterface() && (matchType.canBeSeenBy(aspectType) || aspectType.isPrivilegedAspect());
	}

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

}