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diff --git a/src/proguard/classfile/visitor/SubclassFilter.java b/src/proguard/classfile/visitor/SubclassFilter.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.classfile.visitor;
+
+import proguard.classfile.*;
+
+/**
+ * This <code>ClassVisitor</code> delegates its visits to another given
+ * <code>ClassVisitor</code>, except for classes that have a given class as
+ * direct subclass.
+ *
+ * @author Eric Lafortune
+ */
+public class SubclassFilter implements ClassVisitor
+{
+ private final Clazz subclass;
+ private final ClassVisitor classVisitor;
+
+
+ /**
+ * Creates a new SubclassFilter.
+ * @param subclass the class whose superclasses will not be visited.
+ * @param classVisitor the <code>ClassVisitor</code> to which visits will
+ * be delegated.
+ */
+ public SubclassFilter(Clazz subclass,
+ ClassVisitor classVisitor)
+ {
+ this.subclass = subclass;
+ this.classVisitor = classVisitor;
+ }
+
+
+ // Implementations for ClassVisitor.
+
+ public void visitProgramClass(ProgramClass programClass)
+ {
+ if (!present(programClass.subClasses))
+ {
+ classVisitor.visitProgramClass(programClass);
+ }
+ }
+
+
+ public void visitLibraryClass(LibraryClass libraryClass)
+ {
+ if (!present(libraryClass.subClasses))
+ {
+ classVisitor.visitLibraryClass(libraryClass);
+ }
+ }
+
+
+ // Small utility methods.
+
+ private boolean present(Clazz[] subclasses)
+ {
+ if (subclasses == null)
+ {
+ return false;
+ }
+
+ for (int index = 0; index < subclasses.length; index++)
+ {
+ if (subclasses[index].equals(subclass))
+ {
+ return true;
+ }
+ }
+
+ return false;
+ }
+} \ No newline at end of file