--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java	2020-04-15 18:51:20.000000000 +0530
+++ /dev/null	2020-04-15 18:51:20.000000000 +0530
@@ -1,170 +0,0 @@
-/*
- * Copyright (c) 2010, 2019, 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.
- */
-
-package jdk.nashorn.internal.runtime.regexp;
-
-import java.util.regex.Pattern;
-import java.util.regex.PatternSyntaxException;
-import jdk.nashorn.internal.runtime.ParserException;
-import jdk.nashorn.internal.runtime.regexp.joni.Matcher;
-import jdk.nashorn.internal.runtime.regexp.joni.Option;
-import jdk.nashorn.internal.runtime.regexp.joni.Regex;
-import jdk.nashorn.internal.runtime.regexp.joni.Region;
-import jdk.nashorn.internal.runtime.regexp.joni.Syntax;
-import jdk.nashorn.internal.runtime.regexp.joni.exception.JOniException;
-
-/**
- * Regular expression implementation based on the Joni engine from the JRuby project.
- */
-public class JoniRegExp extends RegExp {
-
-    /** Compiled Joni Regex */
-    private Regex regex;
-
-    /**
-     * Construct a Regular expression from the given {@code pattern} and {@code flags} strings.
-     *
-     * @param pattern RegExp pattern string
-     * @param flags RegExp flag string
-     * @throws ParserException if flags is invalid or pattern string has syntax error.
-     */
-    public JoniRegExp(final String pattern, final String flags) throws ParserException {
-        super(pattern, flags);
-
-        int option = Option.SINGLELINE;
-
-        if (this.isIgnoreCase()) {
-            option |= Option.IGNORECASE;
-        }
-        if (this.isMultiline()) {
-            option &= ~Option.SINGLELINE;
-            option |= Option.NEGATE_SINGLELINE;
-        }
-
-        try {
-            RegExpScanner parsed;
-
-            try {
-                parsed = RegExpScanner.scan(pattern);
-            } catch (final PatternSyntaxException e) {
-                // refine the exception with a better syntax error, if this
-                // passes, just rethrow what we have
-                Pattern.compile(pattern, 0);
-                throw e;
-            }
-
-            if (parsed != null) {
-                final char[] javaPattern = parsed.getJavaPattern().toCharArray();
-                this.regex = new Regex(javaPattern, 0, javaPattern.length, option, Syntax.JAVASCRIPT);
-                this.groupsInNegativeLookahead = parsed.getGroupsInNegativeLookahead();
-            }
-        } catch (final PatternSyntaxException | JOniException e2) {
-            throwParserException("syntax", e2.getMessage());
-        } catch (StackOverflowError e3) {
-            throw new RuntimeException(e3);
-        }
-    }
-
-    @Override
-    public RegExpMatcher match(final String input) {
-        if (regex == null) {
-            return null;
-        }
-
-        return new JoniMatcher(input);
-    }
-
-    /**
-     * RegExp Factory class for Joni regexp engine.
-     */
-    public static class Factory extends RegExpFactory {
-
-        @Override
-        public RegExp compile(final String pattern, final String flags) throws ParserException {
-            return new JoniRegExp(pattern, flags);
-        }
-
-    }
-
-    class JoniMatcher implements RegExpMatcher {
-        final String input;
-        final Matcher joniMatcher;
-
-        JoniMatcher(final String input) {
-            this.input = input;
-            this.joniMatcher = regex.matcher(input.toCharArray());
-        }
-
-        @Override
-        public boolean search(final int start) {
-            return joniMatcher.search(start, input.length(), Option.NONE) > -1;
-        }
-
-        @Override
-        public String getInput() {
-            return input;
-        }
-
-        @Override
-        public int start() {
-            return joniMatcher.getBegin();
-        }
-
-        @Override
-        public int start(final int group) {
-            return group == 0 ? start() : joniMatcher.getRegion().beg[group];
-        }
-
-        @Override
-        public int end() {
-            return joniMatcher.getEnd();
-        }
-
-        @Override
-        public int end(final int group) {
-            return group == 0 ? end() : joniMatcher.getRegion().end[group];
-        }
-
-        @Override
-        public String group() {
-            return input.substring(joniMatcher.getBegin(), joniMatcher.getEnd());
-        }
-
-        @Override
-        public String group(final int group) {
-            if (group == 0) {
-                return group();
-            }
-            final Region region = joniMatcher.getRegion();
-            return input.substring(region.beg[group], region.end[group]);
-        }
-
-        @Override
-        public int groupCount() {
-            final Region region = joniMatcher.getRegion();
-            return region == null ? 0 : region.numRegs - 1;
-        }
-    }
-}