Helper InterruptibleInput

Jan Burse, created Feb 10. 2019
package matula.util.wire;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InterruptedIOException;
/**
* <p>Provides an interruptible input.</p>
* <p/>
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
* Rights & License
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* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
final class InterruptibleInput extends FilterInputStream {
/**
* <p>Create an interruptible input.</p>
*
* @param in The input stream.
*/
protected InterruptibleInput(InputStream in) {
super(in);
}
/**
* <p>Read a byte from interruptible input.</p>
*
* @return The byte or -1.
* @throws IOException I/O Error.
*/
public int read()
throws IOException {
AbstractLivestock live = AbstractLivestock.currentLivestock(
Thread.currentThread());
if (live != null)
live.closer = this;
try {
return in.read();
} finally {
if (live != null)
live.closer = null;
if (Thread.interrupted())
throw new InterruptedIOException();
}
}
/**
* <p>Read bytes from interruptible input.</p>
*
* @param b The bytes.
* @param off The offset.
* @param len The length.
* @return The length or -1.
* @throws IOException I/O Error.
*/
public int read(byte[] b, int off, int len)
throws IOException {
AbstractLivestock live = AbstractLivestock.currentLivestock(
Thread.currentThread());
if (live != null)
live.closer = this;
try {
return in.read(b, off, len);
} finally {
if (live != null)
live.closer = null;
if (Thread.interrupted())
throw new InterruptedIOException();
}
}
}

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