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package com.fasterxml.jackson.databind.util;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
/**
* Simple {@link InputStream} implementation that exposes currently
* available content of a {@link ByteBuffer}.
*/
public class ByteBufferBackedInputStream extends InputStream {
protected final ByteBuffer _b;
public ByteBufferBackedInputStream(ByteBuffer buf) { _b = buf; }
@Override public int available() { return _b.remaining(); }
@Override
public int read() throws IOException { return _b.hasRemaining() ? (_b.get() & 0xFF) : -1; }
@Override
public int read(byte[] bytes, int off, int len) throws IOException {
if (!_b.hasRemaining()) return -1;
len = Math.min(len, _b.remaining());
_b.get(bytes, off, len);
return len;
}
}