com.amazonaws.encryptionsdk.internal

Class Utils

java.lang.Object

com.amazonaws.encryptionsdk.internal.Utils

public final class Utils
extends Object

Internal utility methods.

Method Summary

Modifier and Type	Method and Description
static <T> T	assertNonNull(T object, String paramName) Throws NullPointerException with message paramName if object is null.
static byte[]	truncate(byte[] arr, int len) Returns a possibly truncated version of arr which is guaranteed to be exactly len elements long.

Methods inherited from class java.lang.Object

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

Method Detail

assertNonNull

public static <T> T assertNonNull(T object,
                                  String paramName)
                           throws NullPointerException

Throws NullPointerException with message paramName if object is null.

Parameters:

object - value to be null-checked

paramName - message for the potential NullPointerException

Returns:

object

Throws:

NullPointerException - if object is null

truncate

public static byte[] truncate(byte[] arr,
                              int len)
                       throws IllegalArgumentException

Returns a possibly truncated version of arr which is guaranteed to be exactly len elements long. If arr is already exactly len elements long, then arr is returned without copy or modification. If arr is longer than len, then a truncated copy is returned. If arr is shorter than len then this throws an IllegalArgumentException.

Throws:

IllegalArgumentException