1 files changed, 177 insertions, 0 deletions
diff --git a/src/proguard/optimize/info/NonPrivateMemberMarker.java b/src/proguard/optimize/info/NonPrivateMemberMarker.java
new file mode 100644
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+++ b/src/proguard/optimize/info/NonPrivateMemberMarker.java
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+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard.optimize.info;
+
+import proguard.classfile.*;
+import proguard.classfile.constant.*;
+import proguard.classfile.constant.visitor.ConstantVisitor;
+import proguard.classfile.util.SimplifiedVisitor;
+import proguard.classfile.visitor.*;
+
+/**
+ * This ClassVisitor marks all class members that can not be made private in the
+ * classes that it visits, and in the classes to which they refer.
+ *
+ * @author Eric Lafortune
+ */
+public class NonPrivateMemberMarker
+extends      SimplifiedVisitor
+implements   ClassVisitor,
+             ConstantVisitor,
+             MemberVisitor
+{
+    private final MethodImplementationFilter filteredMethodMarker = new MethodImplementationFilter(this);
+
+
+    // Implementations for ClassVisitor.
+
+    public void visitProgramClass(ProgramClass programClass)
+    {
+        // Mark all referenced class members in different classes.
+        programClass.constantPoolEntriesAccept(this);
+
+        // Explicitly mark the <clinit> method.
+        programClass.methodAccept(ClassConstants.INTERNAL_METHOD_NAME_CLINIT,
+                                  ClassConstants.INTERNAL_METHOD_TYPE_CLINIT,
+                                  this);
+
+        // Explicitly mark the parameterless <init> method.
+        programClass.methodAccept(ClassConstants.INTERNAL_METHOD_NAME_INIT,
+                                  ClassConstants.INTERNAL_METHOD_TYPE_INIT,
+                                  this);
+
+        // Mark all methods that may have implementations.
+        programClass.methodsAccept(filteredMethodMarker);
+    }
+
+
+    public void visitLibraryClass(LibraryClass libraryClass)
+    {
+        // Go over all methods.
+        libraryClass.methodsAccept(this);
+    }
+
+
+    // Implementations for ConstantVisitor.
+
+    public void visitAnyConstant(Clazz clazz, Constant constant) {}
+
+
+    public void visitStringConstant(Clazz clazz, StringConstant stringConstant)
+    {
+        Clazz referencedClass = stringConstant.referencedClass;
+
+        // Is it refering to another class or class member?
+        if (referencedClass != null &&
+            !referencedClass.equals(clazz))
+        {
+            // The referenced class member, if any, can never be made private.
+            stringConstant.referencedMemberAccept(this);
+        }
+    }
+
+
+    public void visitAnyRefConstant(Clazz clazz, RefConstant refConstant)
+    {
+        Clazz referencedClass = refConstant.referencedClass;
+
+        // Is it refering to a class member in another class?
+        // The class member might be in another class, or
+        // it may be referenced through another class.
+        if (referencedClass != null &&
+            !referencedClass.equals(clazz) ||
+            !refConstant.getClassName(clazz).equals(clazz.getName()))
+        {
+            // The referenced class member can never be made private.
+            refConstant.referencedMemberAccept(this);
+        }
+    }
+
+
+    // Implementations for MemberVisitor.
+
+    public void visitProgramField(ProgramClass programClass, ProgramField programField)
+    {
+        markCanNotBeMadePrivate(programField);
+    }
+
+
+    public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField)
+    {
+        markCanNotBeMadePrivate(libraryField);
+    }
+
+
+    public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
+    {
+        markCanNotBeMadePrivate(programMethod);
+    }
+
+
+    public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
+    {
+        markCanNotBeMadePrivate(libraryMethod);
+    }
+
+
+    // Small utility methods.
+
+    private static void markCanNotBeMadePrivate(Field field)
+    {
+        FieldOptimizationInfo info = FieldOptimizationInfo.getFieldOptimizationInfo(field);
+        if (info != null)
+        {
+            info.setCanNotBeMadePrivate();
+        }
+    }
+
+
+    /**
+     * Returns whether the given field can be made private.
+     */
+    public static boolean canBeMadePrivate(Field field)
+    {
+        FieldOptimizationInfo info = FieldOptimizationInfo.getFieldOptimizationInfo(field);
+        return info != null &&
+               info.canBeMadePrivate();
+    }
+
+
+    private static void markCanNotBeMadePrivate(Method method)
+    {
+        MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method);
+        if (info != null)
+        {
+            info.setCanNotBeMadePrivate();
+        }
+    }
+
+
+    /**
+     * Returns whether the given method can be made private.
+     */
+    public static boolean canBeMadePrivate(Method method)
+    {
+        MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method);
+        return info != null &&
+               info.canBeMadePrivate();
+    }
+}