content: /*
   * Copyright (c) 1999, 2018, 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.util.Locale;
  
  import openjdk.tools.javac.code.Preview;
  import openjdk.tools.javac.code.Source;
  import openjdk.tools.javac.tree.DocTreeMaker;
  import openjdk.tools.javac.tree.TreeMaker;
  import openjdk.tools.javac.util.Context;
  import openjdk.tools.javac.util.Log;
  import openjdk.tools.javac.util.Names;
  import openjdk.tools.javac.util.Options;
  
  /**
   * A factory for creating parsers.
   *
   * <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 ParserFactory {
  
      /** The context key for the parser factory. */
      protected static final Context.Key<ParserFactory> parserFactoryKey = new Context.Key<>();
  
      public static ParserFactory instance(Context context) {
          ParserFactory instance = context.get(parserFactoryKey);
          if (instance == null) {
              instance = new ParserFactory(context);
          }
          return instance;
      }
      
      final TreeMaker F;
      final DocTreeMaker docTreeMaker;
      final Log log;
      final Tokens tokens;
      final Source source;
      final Preview preview;
      final Names names;
      final Options options;
      final ScannerFactory scannerFactory;
      final Locale locale;
  
      protected ParserFactory(Context context) {
          super();
          context.put(parserFactoryKey, this);
          this.F = TreeMaker.instance(context);
          this.docTreeMaker = DocTreeMaker.instance(context);
          this.log = Log.instance(context);
          this.names = Names.instance(context);
          this.tokens = Tokens.instance(context);
          this.source = Source.instance(context);
          this.preview = Preview.instance(context);
          this.options = Options.instance(context);
          this.scannerFactory = ScannerFactory.instance(context);
          this.locale = context.get(Locale.class);
      }
  
      public JavacParser newParser(CharSequence input, boolean keepDocComments, boolean keepEndPos, boolean keepLineMap) {
          return newParser(input, keepDocComments, keepEndPos, keepLineMap, false);
      }
  
      public JavacParser newParser(CharSequence input, boolean keepDocComments, boolean keepEndPos, boolean keepLineMap, boolean parseModuleInfo) {
          Lexer lexer = scannerFactory.newScanner(input, keepDocComments);
          final JavacParser parser = new JavacParser(this, lexer, keepDocComments, keepLineMap, keepEndPos, parseModuleInfo);
          return parser;
      }
  }
  