001/* 002 * HA-JDBC: High-Availability JDBC 003 * Copyright (C) 2013 Paul Ferraro 004 * 005 * This program is free software: you can redistribute it and/or modify 006 * it under the terms of the GNU Lesser General Public License as published by 007 * the Free Software Foundation, either version 3 of the License, or 008 * (at your option) any later version. 009 * 010 * This program is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 013 * GNU Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public License 016 * along with this program. If not, see <http://www.gnu.org/licenses/>. 017 */ 018package net.sf.hajdbc.io.file; 019 020import java.io.BufferedReader; 021import java.io.File; 022import java.io.FileReader; 023import java.io.FileWriter; 024import java.io.IOException; 025import java.io.Reader; 026import java.io.Writer; 027import java.nio.CharBuffer; 028 029import net.sf.hajdbc.io.InputSinkChannel; 030import net.sf.hajdbc.util.Files; 031import net.sf.hajdbc.util.Resources; 032 033/** 034 * Reader channel for writing to, and reading from, a file sink.. 035 * @author Paul Ferraro 036 */ 037public class FileReaderSinkChannel implements InputSinkChannel<Reader, File> 038{ 039 @Override 040 public File write(Reader reader) throws IOException 041 { 042 File file = Files.createTempFile(FileInputSinkStrategy.TEMP_FILE_SUFFIX); 043 Writer writer = new FileWriter(file); 044 try 045 { 046 CharBuffer buffer = CharBuffer.allocate(BUFFER_SIZE); 047 048 while (reader.read(buffer) > 0) 049 { 050 buffer.flip(); 051 writer.append(buffer); 052 buffer.clear(); 053 } 054 055 return file; 056 } 057 finally 058 { 059 Resources.close(writer); 060 } 061 } 062 063 @Override 064 public Reader read(File sink) throws IOException 065 { 066 return new BufferedReader(new FileReader(sink), BUFFER_SIZE); 067 } 068}