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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 v1.0
* which accompanies this distribution and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* PARC initial implementation
* ******************************************************************/
package org.aspectj.weaver;
import java.io.IOException;
import org.aspectj.util.TypeSafeEnum;
/**
* The five kinds of advice in AspectJ.
*
* @author Erik Hilsdale
* @author Jim Hugunin
*/
public class AdviceKind extends TypeSafeEnum {
private int precedence;
private boolean isAfter;
private boolean isCflow;
public AdviceKind(String name, int key, int precedence, boolean isAfter, boolean isCflow) {
super(name, key);
this.precedence = precedence;
this.isAfter = isAfter;
this.isCflow = isCflow;
}
public static AdviceKind read(VersionedDataInputStream s) throws IOException {
int key = s.readByte();
switch (key) {
case 1:
return Before;
case 2:
return After;
case 3:
return AfterThrowing;
case 4:
return AfterReturning;
case 5:
return Around;
case 6:
return CflowEntry;
case 7:
return CflowBelowEntry;
case 8:
return InterInitializer;
case 9:
return PerCflowEntry;
case 10:
return PerCflowBelowEntry;
case 11:
return PerThisEntry;
case 12:
return PerTargetEntry;
case 13:
return Softener;
case 14:
return PerTypeWithinEntry;
}
throw new RuntimeException("unimplemented kind: " + key);
}
public static final AdviceKind Before = new AdviceKind("before", 1, 0, false, false);
public static final AdviceKind After = new AdviceKind("after", 2, 0, true, false);
public static final AdviceKind AfterThrowing = new AdviceKind("afterThrowing", 3, 0, true, false);
public static final AdviceKind AfterReturning = new AdviceKind("afterReturning", 4, 0, true, false);
public static final AdviceKind Around = new AdviceKind("around", 5, 0, false, false);
// these kinds can't be declared, but are used by the weaver
public static final AdviceKind CflowEntry = new AdviceKind("cflowEntry", 6, 1, false, true);
public static final AdviceKind CflowBelowEntry = new AdviceKind("cflowBelowEntry", 7, -1, false, true); // XXX resolve
// precednece with the
// below
public static final AdviceKind InterInitializer = new AdviceKind("interInitializer", 8, -2, false, false);
public static final AdviceKind PerCflowEntry = new AdviceKind("perCflowEntry", 9, 1, false, true);
public static final AdviceKind PerCflowBelowEntry = new AdviceKind("perCflowBelowEntry", 10, -1, false, true);
public static final AdviceKind PerThisEntry = new AdviceKind("perThisEntry", 11, 1, false, false);
public static final AdviceKind PerTargetEntry = new AdviceKind("perTargetEntry", 12, 1, false, false);
public static final AdviceKind Softener = new AdviceKind("softener", 13, 1, false, false);
// PTWIMPL Advice representing when aspect should be initialized
public static final AdviceKind PerTypeWithinEntry = new AdviceKind("perTypeWithinEntry", 14, 1, false, false);
public static AdviceKind stringToKind(String s) {
if (s.equals(Before.getName()))
return Before;
if (s.equals(After.getName()))
return After;
if (s.equals(AfterThrowing.getName()))
return AfterThrowing;
if (s.equals(AfterReturning.getName()))
return AfterReturning;
if (s.equals(Around.getName()))
return Around;
throw new IllegalArgumentException("unknown kind: " + "\"" + s + "\"");
}
public boolean isAfter() {
return this.isAfter;
}
public boolean isCflow() {
return this.isCflow;
}
public int getPrecedence() {
return precedence;
}
public boolean isPerEntry() {
return this == PerCflowEntry || this == PerCflowBelowEntry || this == PerThisEntry || this == PerTargetEntry
|| this == PerTypeWithinEntry; // PTWIMPL Allow for PTW case
}
public boolean isPerObjectEntry() {
return this == PerThisEntry || this == PerTargetEntry;
}
}
