1 files changed, 84 insertions, 0 deletions
diff --git a/src/proguard/optimize/peephole/ClassFinalizer.java b/src/proguard/optimize/peephole/ClassFinalizer.java
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+++ b/src/proguard/optimize/peephole/ClassFinalizer.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.peephole;
+
+import proguard.classfile.*;
+import proguard.classfile.util.*;
+import proguard.classfile.visitor.*;
+import proguard.optimize.KeepMarker;
+
+/**
+ * This <code>ClassVisitor</code> makes the program classes that it visits
+ * final, if possible.
+ *
+ * @author Eric Lafortune
+ */
+public class ClassFinalizer
+extends      SimplifiedVisitor
+implements   ClassVisitor
+{
+    private final ClassVisitor extraClassVisitor;
+
+
+    /**
+     * Creates a new ClassFinalizer.
+     */
+    public ClassFinalizer()
+    {
+        this(null);
+    }
+
+
+    /**
+     * Creates a new ClassFinalizer.
+     * @param extraClassVisitor an optional extra visitor for all finalized
+     *                          classes.
+     */
+    public ClassFinalizer(ClassVisitor  extraClassVisitor)
+    {
+        this.extraClassVisitor = extraClassVisitor;
+    }
+
+
+    // Implementations for ClassVisitor.
+
+    public void visitProgramClass(ProgramClass programClass)
+    {
+        // If the class is not final/interface/abstract,
+        // and it is not being kept,
+        // and it doesn't have any subclasses,
+        // then make it final.
+        if ((programClass.u2accessFlags & (ClassConstants.INTERNAL_ACC_FINAL     |
+                                           ClassConstants.INTERNAL_ACC_INTERFACE |
+                                           ClassConstants.INTERNAL_ACC_ABSTRACT)) == 0 &&
+            !KeepMarker.isKept(programClass)                                           &&
+            programClass.subClasses == null)
+        {
+            programClass.u2accessFlags |= ClassConstants.INTERNAL_ACC_FINAL;
+
+            // Visit the class, if required.
+            if (extraClassVisitor != null)
+            {
+                extraClassVisitor.visitProgramClass(programClass);
+            }
+        }
+    }
+}