1 /* 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.tools.javac.parser; 27 28 import java.util.Locale; 29 30 import com.sun.tools.javac.code.Source; 31 import com.sun.tools.javac.tree.DocTreeMaker; 32 import com.sun.tools.javac.tree.TreeMaker; 33 import com.sun.tools.javac.util.Context; 34 import com.sun.tools.javac.util.Log; 35 import com.sun.tools.javac.util.Names; 36 import com.sun.tools.javac.util.Options; 37 38 /** 39 * A factory for creating parsers. 40 * 41 * <p><b>This is NOT part of any supported API. 42 * If you write code that depends on this, you do so at your own risk. 43 * This code and its internal interfaces are subject to change or 44 * deletion without notice.</b> 45 */ 46 public class ParserFactory { 47 48 /** The context key for the parser factory. */ 49 protected static final Context.Key<ParserFactory> parserFactoryKey = new Context.Key<>(); 50 51 public static ParserFactory instance(Context context) { 52 ParserFactory instance = context.get(parserFactoryKey); 53 if (instance == null) { 54 instance = new ParserFactory(context); 55 } 56 return instance; 57 } 58 59 final TreeMaker F; 60 final DocTreeMaker docTreeMaker; 61 final Log log; 62 final Tokens tokens; 63 final Source source; 64 final Names names; 65 final Options options; 66 final ScannerFactory scannerFactory; 67 final Locale locale; 68 69 protected ParserFactory(Context context) { 70 super(); 71 context.put(parserFactoryKey, this); 72 this.F = TreeMaker.instance(context); 73 this.docTreeMaker = DocTreeMaker.instance(context); 74 this.log = Log.instance(context); 75 this.names = Names.instance(context); 76 this.tokens = Tokens.instance(context); 77 this.source = Source.instance(context); 78 this.options = Options.instance(context); 79 this.scannerFactory = ScannerFactory.instance(context); 80 this.locale = context.get(Locale.class); 81 } 82 83 public JavacParser newParser(CharSequence input, boolean keepDocComments, boolean keepEndPos, boolean keepLineMap) { 84 return newParser(input, keepDocComments, keepEndPos, keepLineMap, false); 85 } 86 87 public JavacParser newParser(CharSequence input, boolean keepDocComments, boolean keepEndPos, boolean keepLineMap, boolean parseModuleInfo) { 88 Lexer lexer = scannerFactory.newScanner(input, keepDocComments); 89 return new JavacParser(this, lexer, keepDocComments, keepLineMap, keepEndPos, parseModuleInfo); 90 } 91 }