Package io.delta.kernel.internal.util

Class Preconditions

Object

io.delta.kernel.internal.util.Preconditions

public class Preconditions
extends Object

Static convenience methods that help a method or constructor check whether it was invoked correctly (that is, whether its preconditions were met).

Method Summary

Modifier and Type	Method	Description
static void	checkArgument(boolean isValid)	Precondition-style validation that throws IllegalArgumentException.
static void	checkArgument(boolean isValid, String message)	Precondition-style validation that throws IllegalArgumentException.
static void	checkArgument(boolean isValid, String message, Object... args)	Precondition-style validation that throws IllegalArgumentException.
static void	checkState(boolean expression, String errorMessage)	Ensures the truth of an expression involving the state of the calling instance.

Methods inherited from class java.lang.Object

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

Method Details

checkArgument

public static void checkArgument(boolean isValid)
                          throws IllegalArgumentException

Precondition-style validation that throws IllegalArgumentException.

Parameters:

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

Throws:

IllegalArgumentException - if isValid is false

checkArgument

public static void checkArgument(boolean isValid,
 String message)
                          throws 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:

IllegalArgumentException - if isValid is false

checkArgument

public static void checkArgument(boolean isValid,
 String message,
 Object... args)
                          throws 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.

args - Objects used to fill in %s placeholders in the message

Throws:

IllegalArgumentException - if isValid is false

checkState

public static void checkState(boolean expression,
 String errorMessage)

Ensures the truth of an expression involving the state of the calling instance.

Parameters:

expression - a boolean expression

errorMessage - the exception message to use if the check fails

Throws:

IllegalStateException - if expression is false