io.delta.kernel.internal.util

Class InternalUtils

Object

io.delta.kernel.internal.util.InternalUtils

public class InternalUtils
extends Object

Method Summary

Modifier and Type	Method and Description
static int	daysSinceEpoch(java.sql.Date date) Utility method to get the number of days since epoch this given date is.
static <T> java.util.Optional<T>	getSingularElement(CloseableIterator<T> iter) Utility method to read at most one element from a CloseableIterator.
static java.util.Optional<Row>	getSingularRow(CloseableIterator<ColumnarBatch> dataIter) Utility method to read at most one row from the given data ColumnarBatch iterator.
static ColumnVector	requireNonNull(ColumnVector vector, int rowId, String columnName)
static Row	requireNonNull(Row row, int ordinal, String columnName)
static ColumnVector	singletonStringColumnVector(String value) Utility method to create a singleton string ColumnVector

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getSingularRow

public static java.util.Optional<Row> getSingularRow(CloseableIterator<ColumnarBatch> dataIter)
                                              throws java.io.IOException

Utility method to read at most one row from the given data ColumnarBatch iterator. If there is more than one row, an exception will be thrown.

Parameters:

dataIter -

Returns:

Throws:

java.io.IOException

getSingularElement

public static <T> java.util.Optional<T> getSingularElement(CloseableIterator<T> iter)
                                                    throws java.io.IOException

Utility method to read at most one element from a CloseableIterator. If there is more than element row, an exception will be thrown.

Throws:

java.io.IOException

daysSinceEpoch

public static int daysSinceEpoch(java.sql.Date date)

Utility method to get the number of days since epoch this given date is.

singletonStringColumnVector

public static ColumnVector singletonStringColumnVector(String value)

Utility method to create a singleton string ColumnVector

Parameters:

value - the string element to create the vector with

Returns:

A ColumnVector with a single element value

requireNonNull

public static Row requireNonNull(Row row,
                                 int ordinal,
                                 String columnName)

requireNonNull

public static ColumnVector requireNonNull(ColumnVector vector,
                                          int rowId,
                                          String columnName)