com.Ostermiller.util.NoCloseInputStream Maven / Gradle / Ivy
/*
* Copyright (C) 2003-2007 Stephen Ostermiller
* http://ostermiller.org/contact.pl?regarding=Java+Utilities
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* See COPYING.TXT for details.
*/
package com.Ostermiller.util;
import java.io.*;
/**
* An input stream with a close method with no effect.
* More information about this class is available from ostermiller.org.
*
* This class is designed to wrap a normal input stream
* so that it can be passed to methods that read from it
* and may erroneously close it. This class is a workaround
* when the method cannot be modified because it is in a
* library.
*
* @author Stephen Ostermiller http://ostermiller.org/contact.pl?regarding=Java+Utilities
* @since ostermillerutils 1.01.00
*/
public class NoCloseInputStream extends InputStream implements NoCloseStream {
/**
* The input stream that is being protected.
* All methods should be forwarded to it,
* except for the close method, which should
* do nothing. The reallyClose method should
* actually close this stream.
*
* @since ostermillerutils 1.01.00
*/
protected InputStream in;
/**
* Protect a new input stream.
*
* @param in The input stream that is being protected.
*
* @since ostermillerutils 1.01.00
*/
public NoCloseInputStream(InputStream in){
this.in = in;
}
/**
* {@inheritDoc}
*/
@Override public int read() throws IOException {
return in.read();
}
/**
* {@inheritDoc}
*/
@Override public int read(byte[] b) throws IOException {
return in.read(b);
}
/**
* {@inheritDoc}
*/
@Override public int read(byte[] b, int off, int len) throws IOException {
return in.read(b, off, len);
}
/**
* {@inheritDoc}
*/
@Override public long skip(long n) throws IOException {
return in.skip(n);
}
/**
* {@inheritDoc}
*/
@Override public int available() throws IOException {
return in.available();
}
/**
* Has no effect.
*
* @see #reallyClose()
*
* @since ostermillerutils 1.01.00
*/
@Override public void close() throws IOException {
// Does nothing
}
/**
* {@inheritDoc}
*/
@Override public void mark(int readlimit) {
in.mark(readlimit);
}
/**
* {@inheritDoc}
*/
@Override public void reset() throws IOException {
in.reset();
}
/**
* {@inheritDoc}
*/
@Override public boolean markSupported(){
return in.markSupported();
}
/**
* {@inheritDoc}
*/
public void reallyClose() throws IOException {
in.close();
}
}