Preconditions

Static convenience methods that help a method or constructor check whether it was invoked correctly.

Constructors

constructor()

open fun checkElementIndex(index: Int, size: Int)

open fun checkElementIndex(index: Int, size: Int, desc: String)

Ensures that index specifies a valid element in an array, list or string of size size.

open fun <T> checkNotNull(@Nullable reference: T): T

open fun <T> checkNotNull(@Nullable reference: T, errorMessage: Any): T

Ensures that an object reference passed as a parameter to the calling method is not null.

open fun checkState(expression: Boolean)

open fun checkState(expression: Boolean, @Nullable errorMessage: Any)

Ensures the truth of an expression involving the state of the calling instance, but not involving any parameters to the calling method.