/*
* Copyright (c) 1999, 2010, 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 com.sun.tools.javac.parser;
import java.nio.CharBuffer;
import com.sun.tools.javac.code.Source;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.Log;
import com.sun.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<ScannerFactory>();
/** 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 Keywords keywords;
/** 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.keywords = Keywords.instance(context);
}
public Scanner newScanner(CharSequence input, boolean keepDocComments) {
if (input instanceof CharBuffer) {
CharBuffer buf = (CharBuffer) input;
if (keepDocComments)
return new DocCommentScanner(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 DocCommentScanner(this, input, inputLength);
else
return new Scanner(this, input, inputLength);
}
}