content: /*
   * Copyright (c) 1999, 2021, 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 openjdk.tools.javac.parser;
  
  import java.nio.CharBuffer;
  
  import openjdk.tools.javac.code.Lint;
  import openjdk.tools.javac.code.Preview;
  import openjdk.tools.javac.code.Source;
  import openjdk.tools.javac.util.Context;
  import openjdk.tools.javac.util.Log;
  import openjdk.tools.javac.util.Names;
  
  
  /**
   * A factory for creating scanners.
   *
   *  <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 ScannerFactory {
      /** The context key for the scanner factory. */
      public static final Context.Key<ScannerFactory> scannerFactoryKey = new Context.Key<>();
  
      /** Get the Factory instance for this context. */
      public static ScannerFactory instance(Context context) {
          ScannerFactory instance = context.get(scannerFactoryKey);
          if (instance == null)
              instance = new ScannerFactory(context);
          return instance;
      }
  
      final Log log;
      final Names names;
      final Source source;
      final Preview preview;
      final Tokens tokens;
      final Lint lint;
  
      /** Create a new scanner factory. */
      protected ScannerFactory(Context context) {
          context.put(scannerFactoryKey, this);
          this.log = Log.instance(context);
          this.names = Names.instance(context);
          this.source = Source.instance(context);
          this.preview = Preview.instance(context);
          this.tokens = Tokens.instance(context);
          this.lint = Lint.instance(context);
      }
  
      public Scanner newScanner(CharSequence input, boolean keepDocComments) {
          if (input instanceof CharBuffer) {
              CharBuffer buf = (CharBuffer) input;
              if (keepDocComments)
                  return new Scanner(this, new JavadocTokenizer(this, buf));
              else
                  return new Scanner(this, buf);
          } else {
              char[] array = input.toString().toCharArray();
              return newScanner(array, array.length, keepDocComments);
          }
      }
  
      public Scanner newScanner(char[] input, int inputLength, boolean keepDocComments) {
          if (keepDocComments)
              return new Scanner(this, new JavadocTokenizer(this, input, inputLength));
          else
              return new Scanner(this, input, inputLength);
      }
  }
  