io.delta.kernel.internal.util

Class InternalUtils

java.lang.Object

io.delta.kernel.internal.util.InternalUtils

public class InternalUtils
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static void	checkArgument(boolean isValid) Precondition-style validation that throws IllegalArgumentException.
static void	checkArgument(boolean isValid, java.lang.String message) Precondition-style validation that throws IllegalArgumentException.
static Row	getScanFileRow(FileStatus fileStatus)
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<FileDataReadResult> dataIter) Utility method to read at most one row from the given data FileDataReadResult iterator.

Methods inherited from class java.lang.Object

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

Method Detail

getScanFileRow

public static Row getScanFileRow(FileStatus fileStatus)

getSingularRow

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

Utility method to read at most one row from the given data FileDataReadResult 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

checkArgument

public static void checkArgument(boolean isValid)
                          throws java.lang.IllegalArgumentException

Precondition-style validation that throws IllegalArgumentException.

Parameters:

isValid - true if valid, false if an exception should be thrown

Throws:

java.lang.IllegalArgumentException - if isValid is false

checkArgument

public static void checkArgument(boolean isValid,
                                 java.lang.String message)
                          throws java.lang.IllegalArgumentException

Precondition-style validation that throws IllegalArgumentException.

Parameters:

isValid - true if valid, false if an exception should be thrown

message - A String message for the exception.

Throws:

java.lang.IllegalArgumentException - if isValid is false