org.heigit.bigspatialdata.oshpbf.parser.util.ByteBufferBackedInputStream Maven / Gradle / Ivy

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The PBF-Parser that transfers osh.pbf-files into database Objects.

There is a newer version: 0.5.11

package org.heigit.bigspatialdata.oshpbf.parser.util;

import java.io.IOException;
import java.io.InputStream;
import java.nio.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;
  }
}