duke@1: /*
jjg@695:  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
duke@1:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1:  *
duke@1:  * This code is free software; you can redistribute it and/or modify it
duke@1:  * under the terms of the GNU General Public License version 2 only, as
ohair@554:  * published by the Free Software Foundation.  Oracle designates this
duke@1:  * particular file as subject to the "Classpath" exception as provided
ohair@554:  * by Oracle in the LICENSE file that accompanied this code.
duke@1:  *
duke@1:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@1:  * version 2 for more details (a copy is included in the LICENSE file that
duke@1:  * accompanied this code).
duke@1:  *
duke@1:  * You should have received a copy of the GNU General Public License version
duke@1:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@1:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1:  *
ohair@554:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554:  * or visit www.oracle.com if you need additional information or have any
ohair@554:  * questions.
duke@1:  */
duke@1: 
duke@1: package com.sun.tools.javac.parser;
duke@1: 
jjg@695: import java.nio.CharBuffer;
duke@1: 
jjg@50: import com.sun.tools.javac.code.Source;
jjg@695: import com.sun.tools.javac.util.Context;
jjg@695: import com.sun.tools.javac.util.Log;
jjg@695: import com.sun.tools.javac.util.Names;
duke@1: 
duke@1: 
jjg@695: /**
jjg@695:  * A factory for creating scanners.
duke@1:  *
jjg@581:  *  <p><b>This is NOT part of any supported API.
jjg@695:  *  If you write code that depends on this, you do so at your own
jjg@695:  *  risk.  This code and its internal interfaces are subject to change
jjg@695:  *  or deletion without notice.</b>
duke@1:  */
jjg@695: public class ScannerFactory {
jjg@695:     /** The context key for the scanner factory. */
jjg@695:     public static final Context.Key<ScannerFactory> scannerFactoryKey =
jjg@695:         new Context.Key<ScannerFactory>();
duke@1: 
jjg@695:     /** Get the Factory instance for this context. */
jjg@695:     public static ScannerFactory instance(Context context) {
jjg@695:         ScannerFactory instance = context.get(scannerFactoryKey);
jjg@695:         if (instance == null)
jjg@695:             instance = new ScannerFactory(context);
jjg@695:         return instance;
jjg@695:     }
duke@1: 
jjg@695:     final Log log;
jjg@695:     final Names names;
jjg@695:     final Source source;
mcimadamore@1113:     final Tokens tokens;
duke@1: 
jjg@695:     /** Create a new scanner factory. */
jjg@695:     protected ScannerFactory(Context context) {
jjg@695:         context.put(scannerFactoryKey, this);
jjg@695:         this.log = Log.instance(context);
jjg@695:         this.names = Names.instance(context);
jjg@695:         this.source = Source.instance(context);
mcimadamore@1113:         this.tokens = Tokens.instance(context);
jjg@695:     }
duke@1: 
jjg@695:     public Scanner newScanner(CharSequence input, boolean keepDocComments) {
jjg@695:         if (input instanceof CharBuffer) {
jjg@695:             CharBuffer buf = (CharBuffer) input;
jjg@695:             if (keepDocComments)
mcimadamore@1113:                 return new Scanner(this, new JavadocTokenizer(this, buf));
jjg@695:             else
jjg@695:                 return new Scanner(this, buf);
jjg@695:         } else {
jjg@695:             char[] array = input.toString().toCharArray();
jjg@695:             return newScanner(array, array.length, keepDocComments);
duke@1:         }
duke@1:     }
duke@1: 
jjg@695:     public Scanner newScanner(char[] input, int inputLength, boolean keepDocComments) {
jjg@695:         if (keepDocComments)
mcimadamore@1113:             return new Scanner(this, new JavadocTokenizer(this, input, inputLength));
jjg@695:         else
jjg@695:             return new Scanner(this, input, inputLength);
duke@1:     }
duke@1: }