Examples of java.nio.ByteBuffer.duplicate()

java.nio.ByteBuffer.duplicate()
Returns a duplicated buffer that shares content with this buffer.
The duplicated buffer's position, limit, capacity and mark are the same as this buffer. The duplicated buffer's readonly property and byte order are same as this buffer too.

The new buffer shares content with this buffer, which means either buffer's change of content will be visible to the other. The two buffer's position, limit and mark are independent.
@return A duplicated buffer that shares content with this buffer.


    @Test
    public void testDataOutputHeapByteBuffer() throws IOException
    {
        ByteBuffer buf = wrap(new byte[345], false);
        DataOutputByteBuffer write = new DataOutputByteBuffer(buf.duplicate());
        DataInput canon = testWrite(write);
        DataInput test = new DataInputStream(new ByteArrayInputStream(ByteBufferUtil.getArray(buf)));
        testRead(test, canon);
    }

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    private static ByteBuffer wrap(byte[] bytes, boolean direct)
    {
        ByteBuffer buf = direct ? ByteBuffer.allocateDirect(bytes.length + 20) : ByteBuffer.allocate(bytes.length + 20);
        buf.position(10);
        buf.limit(bytes.length + 10);
        buf.duplicate().put(bytes);
        return buf;
    }
}

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    public KijiCell<T> apply(final Row row) {
      final ByteBuffer qualifier = row.getBytes(CQLUtils.QUALIFIER_COL);


      if (!qualifier.equals(mLastQualifier)) {
        try {
          mLastQualifier = qualifier.duplicate();
          mLastColumn =
              mColumnTranslator.toKijiColumnName(
                  mTableName,
                  new CassandraColumnName(
                      mFamilyColumn.getFamily(),

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        {
            buf = encodeAsBuffer();
            _encoded = buf;
        }


        buf = buf.duplicate();


        buf.position(offsetInMetaData);


        if(dest.remaining() < buf.limit())
        {

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                pos += getContent(body, pos);
            }


            body.flip();


            getMetaData().setBody(body.duplicate());
        }
        return body;
    }


    public Session getSession()

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     * JNI operations fail on non-byte views of a direct buffer.
     */
    public void testBufferView() {
        ByteBuffer b = ByteBuffer.allocateDirect(100);
        assertTrue(b.isDirect());
        assertView("duplicate", b, b.duplicate(), 1);
        assertView("char view", b, b.asCharBuffer(), 2);
        assertView("short view", b, b.asShortBuffer(), 2);
        assertView("int view", b, b.asIntBuffer(), 4);
        assertView("float view", b, b.asFloatBuffer(), 4);
        assertView("double view", b, b.asDoubleBuffer(), 8);

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              cacheBlock);
          if (cachedBuf != null) {
            // Return a distinct 'shallow copy' of the block,
            // so pos doesnt get messed by the scanner
            cacheHits++;
            return cachedBuf.duplicate();
          }
          // Cache Miss, please load.
        }


        ByteBuffer buf = decompress(metaIndex.blockOffsets[block],

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        readTime += System.currentTimeMillis() - now;
        readOps++;


        // Cache the block
        if(cacheBlock && cache != null) {
          cache.cacheBlock(name + "meta" + block, buf.duplicate(), inMemory);
        }


        return buf;
      }
    }

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          ByteBuffer cachedBuf = cache.getBlock(name + block, cacheBlock);
          if (cachedBuf != null) {
            // Return a distinct 'shallow copy' of the block,
            // so pos doesnt get messed by the scanner
            cacheHits++;
            return cachedBuf.duplicate();
          }
          // Carry on, please load.
        }


        // Load block from filesystem.

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        readTime += System.currentTimeMillis() - now;
        readOps++;


        // Cache the block
        if(cacheBlock && cache != null) {
          cache.cacheBlock(name + block, buf.duplicate(), inMemory);
        }


        return buf;
      }
    }

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