content: /*
   * Copyright (c) 2013, 2014, 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
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   */
  
  package openjdk.tools.javac.util;
  
  import java.util.Locale;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /** A collection of utilities for String manipulation.
   *
   *  <p><b>This is NOT part of any supported API.
   *  If you write code that depends on this, you do so at your own risk.
   *  This code and its internal interfaces are subject to change or
   *  deletion without notice.</b>
   */
  public class StringUtils {
  
      /**Converts the given String to lower case using the {@link Locale#US US Locale}. The result
       * is independent of the default Locale in the current JVM instance.
       */
      public static String toLowerCase(String source) {
          return source.toLowerCase(Locale.US);
      }
  
      /**Converts the given String to upper case using the {@link Locale#US US Locale}. The result
       * is independent of the default Locale in the current JVM instance.
       */
      public static String toUpperCase(String source) {
          return source.toUpperCase(Locale.US);
      }
  
      /**Case insensitive version of {@link String#indexOf(java.lang.String)}. Equivalent to
       * {@code text.indexOf(str)}, except the matching is case insensitive.
       */
      public static int indexOfIgnoreCase(String text, String str) {
          return indexOfIgnoreCase(text, str, 0);
      }
  
      /**Case insensitive version of {@link String#indexOf(java.lang.String, int)}. Equivalent to
       * {@code text.indexOf(str, startIndex)}, except the matching is case insensitive.
       */
      public static int indexOfIgnoreCase(String text, String str, int startIndex) {
          Matcher m = Pattern.compile(Pattern.quote(str), Pattern.CASE_INSENSITIVE).matcher(text);
          return m.find(startIndex) ? m.start() : -1;
      }
  
  }
  