/*
* Copyright 2012 The Solmix Project
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.gnu.org/licenses/
* or see the FSF site: http://www.fsf.org.
*/
package org.solmix.commons.io;
import static org.solmix.commons.util.DataUtils.buildList;
import java.io.IOException;
import java.io.Reader;
import java.util.Iterator;
import java.util.List;
import org.solmix.commons.util.IOUtils;
/**
* @version 110035
*/
public class SequenceReader extends Reader
{
public SequenceReader(List readerList)
{
readers = null;
currentReader = null;
readers = readerList.iterator();
try {
nextReader();
} catch (IOException impossible) {
}
}
public SequenceReader(Object... source)
{
readers = null;
currentReader = null;
readers = buildList(source).iterator();
try {
nextReader();
} catch (IOException impossible) {
}
}
public int read() throws IOException
{
if (currentReader == null)
return -1;
int character = currentReader.read();
if (character == -1) {
nextReader();
return read();
} else {
return character;
}
}
public int read(char buffer[], int offset, int length) throws IOException
{
if (currentReader == null)
return -1;
int numRead = currentReader.read(buffer, offset, length);
if (numRead <= 0) {
nextReader();
return read(buffer, offset, length);
} else {
return numRead;
}
}
public void close() throws IOException
{
do
nextReader();
while (currentReader != null);
}
final void nextReader() throws IOException
{
if (currentReader != null)
currentReader.close();
if (readers.hasNext())
currentReader = IOUtils.makeReader(readers.next());
else
currentReader = null;
}
private Iterator readers;
private Reader currentReader;
}