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   1 /* *******************************************************************
   2  * Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
   3  * All rights reserved.
   4  * This program and the accompanying materials are made available
   5  * under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     PARC     initial implementation
  11  * ******************************************************************/
  12
  13 package org.aspectj.ajdt.internal.compiler.lookup;
  14
  15 import java.util.Collection;
  16 import java.util.HashMap;
  17 import java.util.Iterator;
  18 import java.util.Map;
  19
  20 import org.aspectj.ajdt.internal.compiler.ast.AspectDeclaration;
  21 import org.aspectj.ajdt.internal.compiler.ast.AstUtil;
  22 import org.aspectj.bridge.ISourceLocation;
  23 import org.aspectj.org.eclipse.jdt.internal.compiler.ast.ASTNode;
  24 import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.FieldBinding;
  25 import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.IPrivilegedHandler;
  26 import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.MethodBinding;
  27 import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.ParameterizedFieldBinding;
  28 import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.ParameterizedMethodBinding;
  29 import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding;
  30 import org.aspectj.weaver.AjcMemberMaker;
  31 import org.aspectj.weaver.Lint;
  32 import org.aspectj.weaver.Member;
  33 import org.aspectj.weaver.PrivilegedAccessMunger;
  34 import org.aspectj.weaver.ResolvedMember;
  35 import org.aspectj.weaver.ResolvedMemberImpl;
  36 import org.aspectj.weaver.ResolvedType;
  37 import org.aspectj.weaver.UnresolvedType;
  38 import org.aspectj.weaver.World;
  39
  40 public class PrivilegedHandler implements IPrivilegedHandler {
  41         private AspectDeclaration inAspect;
  42         private Map accessors = new HashMap();
  43
  44         public PrivilegedHandler(AspectDeclaration inAspect) {
  45                 this.inAspect = inAspect;
  46         }
  47
  48         @Override
  49         public boolean definesPrivilegedAccessToField(FieldBinding field) {
  50                 if (field instanceof ParameterizedFieldBinding) {
  51                         field = ((ParameterizedFieldBinding) field).originalField;
  52                 }
  53                 ResolvedMember key = inAspect.factory.makeResolvedMember(field);
  54                 return (accessors.containsKey(key));
  55         }
  56
  57         @Override
  58         public FieldBinding getPrivilegedAccessField(FieldBinding baseField, ASTNode location) {
  59                 if (baseField instanceof ParameterizedFieldBinding) {
  60                         baseField = ((ParameterizedFieldBinding) baseField).originalField;
  61                 }
  62                 ResolvedMember key = inAspect.factory.makeResolvedMember(baseField);
  63                 if (accessors.containsKey(key))
  64                         return (FieldBinding) accessors.get(key);
  65                 FieldBinding ret = new PrivilegedFieldBinding(inAspect, baseField);
  66                 checkWeaveAccess(key.getDeclaringType(), location);
  67                 if (!baseField.alwaysNeedsAccessMethod(true))
  68                         accessors.put(key, ret);
  69                 // 307120
  70                 ResolvedType rt = inAspect.factory.fromEclipse(baseField.declaringClass);
  71                 if (rt != null) {
  72                         // ReferenceTypeDelegate rtd = ((ReferenceType) rt).getDelegate();
  73                         // if (rtd instanceof EclipseSourceType) {
  74                         rt.addInterTypeMunger(new EclipseTypeMunger(inAspect.factory, new PrivilegedAccessMunger(key, true), inAspect.typeX,
  75                                         null), true);
  76                         // }
  77                 }
  78                 return ret;
  79         }
  80
  81         @Override
  82         public MethodBinding getPrivilegedAccessMethod(MethodBinding baseMethod, ASTNode location) {
  83                 if (baseMethod.alwaysNeedsAccessMethod())
  84                         return baseMethod;
  85
  86                 ResolvedMember key = null;
  87
  88                 if (baseMethod instanceof ParameterizedMethodBinding) {
  89                         key = inAspect.factory.makeResolvedMember(((ParameterizedMethodBinding) baseMethod).original());
  90                 } else {
  91                         key = inAspect.factory.makeResolvedMember(baseMethod);
  92                 }
  93                 if (accessors.containsKey(key))
  94                         return (MethodBinding) accessors.get(key);
  95
  96                 MethodBinding ret;
  97                 if (baseMethod.isConstructor()) {
  98                         ret = new MethodBinding(baseMethod, baseMethod.declaringClass);
  99                         ret.modifiers = AstUtil.makePublic(ret.modifiers);
 100                         baseMethod.modifiers = ret.modifiers;
 101                 } else {
 102                         ret = inAspect.factory.makeMethodBinding(AjcMemberMaker.privilegedAccessMethodForMethod(inAspect.typeX, key));
 103                 }
 104                 checkWeaveAccess(key.getDeclaringType(), location);
 105                 accessors.put(key, ret);
 106                 // if (!baseMethod.isConstructor()) {
 107                 // ResolvedType rt = inAspect.factory.fromEclipse(baseMethod.declaringClass);
 108                 // if (rt!=null) {
 109                 // ReferenceTypeDelegate rtd = ((ReferenceType)rt).getDelegate();
 110                 // if (rtd instanceof EclipseSourceType) {
 111                 // rt.addInterTypeMunger(new EclipseTypeMunger(inAspect.factory,new PrivilegedAccessMunger(key, true),inAspect.typeX,null),
 112                 // true);
 113                 // }
 114                 // }
 115                 // }
 116                 return ret;
 117         }
 118
 119         @Override
 120         public void notePrivilegedTypeAccess(ReferenceBinding type, ASTNode location) {
 121                 ResolvedMember key = new ResolvedMemberImpl(Member.STATIC_INITIALIZATION, inAspect.factory.fromEclipse(type), 0,
 122                                 UnresolvedType.VOID, "", UnresolvedType.NONE);
 123
 124                 checkWeaveAccess(key.getDeclaringType(), location);
 125                 accessors.put(key, key);
 126         }
 127
 128         private void checkWeaveAccess(UnresolvedType typeX, ASTNode location) {
 129                 World world = inAspect.factory.getWorld();
 130                 Lint.Kind check = world.getLint().typeNotExposedToWeaver;
 131                 if (check.isEnabled()) {
 132                         if (!world.resolve(typeX).isExposedToWeaver()) {
 133                                 ISourceLocation loc = null;
 134                                 if (location != null) {
 135                                         loc = new EclipseSourceLocation(inAspect.compilationResult, location.sourceStart, location.sourceEnd);
 136                                 }
 137                                 check.signal(typeX.getName() + " (needed for privileged access)", loc);
 138                         }
 139                 }
 140         }
 141
 142         public ResolvedMember[] getMembers() {
 143                 Collection m = accessors.keySet();
 144                 int len = m.size();
 145                 ResolvedMember[] ret = new ResolvedMember[len];
 146                 int index = 0;
 147                 for (Object o : m) {
 148                         ret[index++] = (ResolvedMember) o;
 149                 }
 150                 return ret;
 151         }
 152 }