ByteBufferInputStream.java
/*-
* #%L
* io.earcam.instrumental.io
* %%
* Copyright (C) 2018 earcam
* %%
* SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT)
*
* You <b>must</b> choose to accept, in full - any individual or combination of
* the following licenses:
* <ul>
* <li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li>
* <li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li>
* <li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li>
* <li><a href="https://opensource.org/licenses/MIT">MIT</a></li>
* </ul>
* #L%
*/
package io.earcam.utilitarian.io;
import java.io.InputStream;
import java.nio.ByteBuffer;
public class ByteBufferInputStream extends InputStream {
private final ByteBuffer buffer;
public ByteBufferInputStream(ByteBuffer buffer)
{
this(buffer, true);
}
public ByteBufferInputStream(ByteBuffer buffer, boolean duplicate)
{
this.buffer = duplicate ? buffer.duplicate() : buffer;
}
@Override
public int read()
{
if(available() == 0) {
return -1;
}
return 0xFF & buffer.get();
}
@Override
public int read(byte[] b)
{
return read(b, 0, b.length);
}
@Override
public int read(byte[] b, int off, int len)
{
int remaining = available();
if(remaining == 0) {
return -1;
}
int length = Math.min(len, remaining);
buffer.get(b, off, length);
return length;
}
@Override
public long skip(long n)
{
if(n <= 0L) {
return 0L;
}
int skipped = Math.min((int) n, buffer.remaining());
buffer.position(buffer.position() + skipped);
return skipped;
}
@Override
public int available()
{
return buffer.remaining();
}
@Override
public void mark(int readlimit)
{
buffer.mark();
}
@Override
public void reset()
{
buffer.reset();
}
@Override
public boolean markSupported()
{
return true;
}
@Override
public void close()
{
/* NoOp */
}
}