--- /dev/null	2009-07-06 20:02:10.000000000 -0700
+++ new/src/share/classes/javax/lang/model/util/SharedSimpleTypeVisitor.java	2010-04-29 22:39:18.000000000 -0700
@@ -0,0 +1,181 @@
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package javax.lang.model.util;
+
+import javax.lang.model.type.*;
+import javax.annotation.processing.SupportedSourceVersion;
+import javax.lang.model.SourceVersion;
+import static javax.lang.model.SourceVersion.*;
+
+/**
+ * Shared package private class to avoid code bloat.
+ *
+ * @param <R> the return type of this visitor's methods.  Use {@link
+ *            Void} for visitors that do not need to return results.
+ * @param <P> the type of the additional parameter to this visitor's
+ *            methods.  Use {@code Void} for visitors that do not need an
+ *            additional parameter.
+ *
+ * @author Joseph D. Darcy
+ * @author Scott Seligman
+ * @author Peter von der Ah&eacute;
+ *
+ * @since 1.7
+ */
+class SharedSimpleTypeVisitor<R, P> extends AbstractTypeVisitor6<R, P> {
+    /**
+     * Default value to be returned; {@link #defaultAction
+     * defaultAction} returns this value unless the method is
+     * overridden.
+     */
+    protected final R DEFAULT_VALUE;
+
+    /**
+     * Constructor for concrete subclasses; uses {@code null} for the
+     * default value.
+     */
+    protected SharedSimpleTypeVisitor() {
+        DEFAULT_VALUE = null;
+    }
+
+    /**
+     * Constructor for concrete subclasses; uses the argument for the
+     * default value.
+     *
+     * @param defaultValue the value to assign to {@link #DEFAULT_VALUE}
+     */
+    protected SharedSimpleTypeVisitor(R defaultValue) {
+        DEFAULT_VALUE = defaultValue;
+    }
+
+    /**
+     * The default action for visit methods.  The implementation in
+     * this class just returns {@link #DEFAULT_VALUE}; subclasses will
+     * commonly override this method.
+     */
+    protected R defaultAction(TypeMirror e, P p) {
+        return DEFAULT_VALUE;
+    }
+
+    /**
+     * {@inheritDoc} This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     */
+    public R visitPrimitive(PrimitiveType t, P p) {
+        return defaultAction(t, p);
+    }
+
+    /**
+     * {@inheritDoc} This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     */
+    public R visitNull(NullType t, P p){
+        return defaultAction(t, p);
+    }
+
+    /**
+     * {@inheritDoc} This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     */
+    public R visitArray(ArrayType t, P p){
+        return defaultAction(t, p);
+    }
+
+    /**
+     * {@inheritDoc} This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     */
+    public R visitDeclared(DeclaredType t, P p){
+        return defaultAction(t, p);
+    }
+
+    /**
+     * {@inheritDoc} This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     */
+    public R visitError(ErrorType t, P p){
+        return defaultAction(t, p);
+    }
+
+    /**
+     * {@inheritDoc} This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     */
+    public R visitTypeVariable(TypeVariable t, P p){
+        return defaultAction(t, p);
+    }
+
+    /**
+     * {@inheritDoc} This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     */
+    public R visitWildcard(WildcardType t, P p){
+        return defaultAction(t, p);
+    }
+
+    /**
+     * {@inheritDoc} This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     */
+    public R visitExecutable(ExecutableType t, P p) {
+        return defaultAction(t, p);
+    }
+
+    /**
+     * {@inheritDoc} This implementation calls {@code defaultAction}.
+     *
+     * @param t {@inheritDoc}
+     * @param p {@inheritDoc}
+     * @return  the result of {@code defaultAction}
+     */
+    public R visitNoType(NoType t, P p){
+        return defaultAction(t, p);
+    }
+}