--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.internal.opt/share/classes/jdk/internal/joptsimple/util/RegexMatcher.java	Tue Jan 26 09:18:51 2016 +0000
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * The MIT License
+ *
+ * Copyright (c) 2004-2014 Paul R. Holser, Jr.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package jdk.internal.joptsimple.util;
+
+import java.util.regex.Pattern;
+
+import static java.util.regex.Pattern.*;
+
+import jdk.internal.joptsimple.ValueConversionException;
+import jdk.internal.joptsimple.ValueConverter;
+
+/**
+ * Ensures that values entirely match a regular expression.
+ *
+ * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>
+ */
+public class RegexMatcher implements ValueConverter<String> {
+    private final Pattern pattern;
+
+    /**
+     * Creates a matcher that uses the given regular expression, modified by the given flags.
+     *
+     * @param pattern the regular expression pattern
+     * @param flags modifying regex flags
+     * @throws IllegalArgumentException if bit values other than those corresponding to the defined match flags are
+     * set in {@code flags}
+     * @throws java.util.regex.PatternSyntaxException if the expression's syntax is invalid
+     */
+    public RegexMatcher( String pattern, int flags ) {
+        this.pattern = compile( pattern, flags );
+    }
+
+    /**
+     * Gives a matcher that uses the given regular expression.
+     *
+     * @param pattern the regular expression pattern
+     * @return the new converter
+     * @throws java.util.regex.PatternSyntaxException if the expression's syntax is invalid
+     */
+    public static ValueConverter<String> regex( String pattern ) {
+        return new RegexMatcher( pattern, 0 );
+    }
+
+    public String convert( String value ) {
+        if ( !pattern.matcher( value ).matches() ) {
+            throw new ValueConversionException(
+                "Value [" + value + "] did not match regex [" + pattern.pattern() + ']' );
+        }
+
+        return value;
+    }
+
+    public Class<String> valueType() {
+        return String.class;
+    }
+
+    public String valuePattern() {
+        return pattern.pattern();
+    }
+}