Example usage for java.nio.channels WritableByteChannel WritableByteChannel

Introduction

In this page you can find the example usage for java.nio.channels WritableByteChannel WritableByteChannel.

Prototype

WritableByteChannel

Source Link

Usage

From source file:Main.java

/**
 * @return//ww  w.  j a  v  a2 s .co m
 */
public static WritableByteChannel asWritableByteChannel(final ByteBuffer buffer) {
    return new WritableByteChannel() {

        private boolean open = true;

        public int write(ByteBuffer src) throws IOException {
            if (open == false) {
                throw new ClosedChannelException();
            }

            final int p = buffer.position();
            final int l = buffer.limit();
            final int r = src.remaining();

            buffer.limit(l + r);
            buffer.position(l);

            buffer.put(src);

            buffer.position(p);

            return r;
        }

        public void close() throws IOException {
            open = false;
        }

        public boolean isOpen() {
            return open;
        }

    };
}

---

From source file:rascal.object.name.MessageDigestObjectNameResolver.java

private byte[] getObjectHash(ObjectSource source) throws IOException {
    final MessageDigest digest = getMessageDigest();
    source.copyTo(new WritableByteChannel() {
        public int write(ByteBuffer src) throws IOException {
            int n = src.remaining();
            digest.update(src);/*from  ww  w .  j  ava  2s  .  c o  m*/
            return n;
        }

        public boolean isOpen() {
            return true;
        }

        public void close() throws IOException {
        }
    });
    return digest.digest();
}

---