Returns an InputStream wrapping a ByteBuffer. - Java java.nio

Java examples for java.nio:ByteBuffer Stream

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Description

Returns an InputStream wrapping a ByteBuffer.

Demo Code


import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.util.Iterator;
import org.apache.log4j.Logger;

public class Main{
    /**//w  w  w  .j a v a2  s . com
     * Returns an InputStream wrapping a ByteBuffer.
     * 
     * @param buf
     * @return
     */
    final static public InputStream asInputStream(final ByteBuffer buf) {
        return new InputStream() {

            public int read() throws IOException {
                if (!buf.hasRemaining()) {
                    return -1;
                }
                return buf.get() & 0xFF;
            }

            public int read(byte[] bytes, int off, int len)
                    throws IOException {
                if (!buf.hasRemaining()) {
                    return -1;
                }

                len = Math.min(len, buf.remaining());
                buf.get(bytes, off, len);
                return len;
            }

            public void mark(int readlimit) {
                buf.mark();
            }

            public void reset() {
                buf.reset();
            }

            public boolean markSupported() {
                return true;
            }
        };
    }
}

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