| /* |
| [The "BSD licence"] |
| Copyright (c) 2005-2008 Terence Parr |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| 3. The name of the author may not be used to endorse or promote products |
| derived from this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package org.eclipse.persistence.internal.libraries.antlr.runtime; |
| |
| import java.io.*; |
| |
| /** This is a char buffer stream that is loaded from a file |
| * all at once when you construct the object. This looks very |
| * much like an ANTLReader or ANTLRInputStream, but it's a special case |
| * since we know the exact size of the object to load. We can avoid lots |
| * of data copying. |
| */ |
| public class ANTLRFileStream extends ANTLRStringStream { |
| protected String fileName; |
| |
| public ANTLRFileStream(String fileName) throws IOException { |
| this(fileName, null); |
| } |
| |
| public ANTLRFileStream(String fileName, String encoding) throws IOException { |
| this.fileName = fileName; |
| load(fileName, encoding); |
| } |
| |
| public void load(String fileName, String encoding) |
| throws IOException |
| { |
| if ( fileName==null ) { |
| return; |
| } |
| File f = new File(fileName); |
| int size = (int)f.length(); |
| InputStreamReader isr; |
| FileInputStream fis = new FileInputStream(fileName); |
| if ( encoding!=null ) { |
| isr = new InputStreamReader(fis, encoding); |
| } |
| else { |
| isr = new InputStreamReader(fis); |
| } |
| try { |
| data = new char[size]; |
| super.n = isr.read(data); |
| } |
| finally { |
| isr.close(); |
| } |
| } |
| |
| public String getSourceName() { |
| return fileName; |
| } |
| } |