parquet

Class Preconditions

java.lang.Object

parquet.Preconditions

public final class Preconditions
extends Object

Utility for parameter validation

Author:

Julien Le Dem

Method Summary

Methods

Modifier and Type	Method and Description
static void	checkArgument(boolean valid, String message)
static <T> T	checkNotNull(T o, String name)
static void	checkState(boolean valid, String message)

Methods inherited from class java.lang.Object

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

Method Detail

checkNotNull

public static <T> T checkNotNull(T o,
                 String name)
                      throws NullPointerException

Parameters:

o - the param to check

name - the name of the param for the error message

Returns:

the validated o

Throws:

NullPointerException - if o is null

checkArgument

public static void checkArgument(boolean valid,
                 String message)
                          throws IllegalArgumentException

Parameters:

valid - whether the argument is valid

message - error message if the argument is not valid

Throws:

IllegalArgumentException - if !valid

checkState

public static void checkState(boolean valid,
              String message)
                       throws IllegalStateException

Parameters:

valid - whether the argument is valid

message - error message if the argument is not valid

Throws:

IllegalStateException - if !valid