Example usage for org.apache.spark.sql.catalyst.expressions.codegen BufferHolder BufferHolder

Introduction

In this page you can find the example usage for org.apache.spark.sql.catalyst.expressions.codegen BufferHolder BufferHolder.

Prototype

BufferHolder(UnsafeRow row) 

Source Link

Usage

From source file:com.splicemachine.db.iapi.types.SQLArray.java

License:Apache License

/**
 *
 * Write into a Project Tungsten format (UnsafeRow).  This calls the
 * reference's write method./*from   w w  w  . j  a  va2  s  .  c  o m*/
 *
 *
 * @param unsafeRowWriter
 * @param ordinal
 * @throws StandardException
  */
public void write(UnsafeRowWriter unsafeRowWriter, int ordinal) throws StandardException {
    if (isNull()) {
        unsafeRowWriter.setNullAt(ordinal);
    } else {
        UnsafeArrayWriter unsafeArrayWriter = new UnsafeArrayWriter();
        BufferHolder bh = new BufferHolder(new UnsafeRow(value.length));
        unsafeArrayWriter.initialize(bh, value.length, 8); // 4 bytes for int?
        for (int i = 0; i < value.length; i++) {
            if (value[i] == null || value[i].isNull()) {
                unsafeArrayWriter.setNull(i);
            } else {
                value[i].writeArray(unsafeArrayWriter, i);
            }
        }
        long currentOffset = unsafeRowWriter.holder().cursor;
        unsafeRowWriter.setOffsetAndSize(ordinal, bh.cursor - 16);
        unsafeRowWriter.holder().grow(bh.cursor - 16);
        Platform.copyMemory(bh.buffer, 16, unsafeRowWriter.holder().buffer, currentOffset, bh.cursor - 16);
    }
}

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