001/* 002 * JRecordBind, fixed-length file (un)marshaller 003 * Copyright 2019, Federico Fissore, and individual contributors. See 004 * AUTHORS.txt in the distribution for a full listing of individual 005 * contributors. 006 * 007 * This is free software; you can redistribute it and/or modify it 008 * under the terms of the GNU Lesser General Public License as 009 * published by the Free Software Foundation; either version 2.1 of 010 * the License, or (at your option) any later version. 011 * 012 * This software is distributed in the hope that it will be useful, 013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 015 * Lesser General Public License for more details. 016 * 017 * You should have received a copy of the GNU Lesser General Public 018 * License along with this software; if not, write to the Free 019 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 020 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 021 */ 022 023package org.fissore.jrecordbind; 024 025import java.io.IOException; 026import java.io.Reader; 027 028/** 029 * The default {@link LineReader} implementation. It will read all lines from a Reader, 030 * using given line separator to understand when a line ends 031 */ 032public class SimpleLineReader implements LineReader { 033 034 public String readLine(Reader reader, Padder defaultPadder, String propertyDelimiter, int recordLength, String lineSeparator) { 035 char[] lineseparatorChars = lineSeparator.toCharArray(); 036 int matchedPos = 0; 037 int inInt; 038 char inChar; 039 StringBuilder outLine = new StringBuilder(); 040 try { 041 while ((inInt = reader.read()) > 0) { 042 inChar = (char) inInt; 043 outLine.append(inChar); 044 if (inChar == lineseparatorChars[matchedPos]) { 045 matchedPos++; 046 if (matchedPos == lineseparatorChars.length) { 047 // We have a line end 048 return outLine.replace(outLine.length() - lineseparatorChars.length, outLine.length(), "").toString(); 049 } 050 } else { 051 if (matchedPos > 0) { 052 matchedPos = 0; 053 } 054 } 055 } 056 if (outLine.length() > 0) { 057 return outLine.toString(); 058 } 059 return null; 060 } catch (IOException e) { 061 throw new RuntimeException(e); 062 } 063 } 064 065}