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PerObjectInterfaceTypeMunger.java

/* *******************************************************************
 * 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 v1.0
 * which accompanies this distribution and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     PARC                 initial implementation
 *     Alexandre Vasseur    rearchitected for #75442 finer grained matching
 * ******************************************************************/
package org.aspectj.weaver;

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;

import java.io.DataOutputStream;
import java.io.IOException;

public class PerObjectInterfaceTypeMunger extends ResolvedTypeMunger {

    private final UnresolvedType interfaceType;
    private final Pointcut testPointcut;
    private TypePattern lazyTestTypePattern;
    
    public boolean equals(Object other) {
      if (other==null || !(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(DataOutputStream 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;
    }
}

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