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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
 *     Alexandre Vasseur    rearchitected for #75442 finer grained matching
 * ******************************************************************/
package org.aspectj.weaver;

import java.io.IOException;

import org.aspectj.weaver.patterns.PerFromSuper;
import org.aspectj.weaver.patterns.PerObject;
import org.aspectj.weaver.patterns.PerThisOrTargetPointcutVisitor;
import org.aspectj.weaver.patterns.Pointcut;
import org.aspectj.weaver.patterns.TypePattern;

public class PerObjectInterfaceTypeMunger extends ResolvedTypeMunger {

	private final UnresolvedType interfaceType;
	private final Pointcut testPointcut;
	private TypePattern lazyTestTypePattern;

	public boolean equals(Object other) {
		if (!(other instanceof PerObjectInterfaceTypeMunger)) {
			return false;
		}
		PerObjectInterfaceTypeMunger o = (PerObjectInterfaceTypeMunger) other;
		return ((testPointcut == null) ? (o.testPointcut == null) : testPointcut.equals(o.testPointcut))
				&& ((lazyTestTypePattern == null) ? (o.lazyTestTypePattern == null) : lazyTestTypePattern
						.equals(o.lazyTestTypePattern));
	}

	private volatile int hashCode = 0;

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

	public PerObjectInterfaceTypeMunger(UnresolvedType aspectType, Pointcut testPointcut) {
		super(PerObjectInterface, null);
		this.testPointcut = testPointcut;
		this.interfaceType = AjcMemberMaker.perObjectInterfaceType(aspectType);
	}

	private TypePattern getTestTypePattern(ResolvedType aspectType) {
		if (lazyTestTypePattern == null) {
			final boolean isPerThis;
			if (aspectType.getPerClause() instanceof PerFromSuper) {
				PerFromSuper ps = (PerFromSuper) aspectType.getPerClause();
				isPerThis = ((PerObject) ps.lookupConcretePerClause(aspectType)).isThis();
			} else {
				isPerThis = ((PerObject) aspectType.getPerClause()).isThis();
			}
			PerThisOrTargetPointcutVisitor v = new PerThisOrTargetPointcutVisitor(!isPerThis, aspectType);
			lazyTestTypePattern = v.getPerTypePointcut(testPointcut);
			// reset hashCode so that its recalculated with the new lazyTestTypePattern
			hashCode = 0;
		}
		return lazyTestTypePattern;
	}

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

	public UnresolvedType getInterfaceType() {
		return interfaceType;
	}

	public Pointcut getTestPointcut() {
		return testPointcut;
	}

	public boolean matches(ResolvedType matchType, ResolvedType aspectType) {
		if (matchType.isInterface()) {
			return false;
		}
		return getTestTypePattern(aspectType).matchesStatically(matchType);
	}

	public boolean isLateMunger() {
		return true;
	}
}