org.apache.parquet

Class Preconditions

java.lang.Object

org.apache.parquet.Preconditions

public final class Preconditions
extends Object

Utility for parameter validation

Method Summary

Modifier and Type	Method and Description
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 <T> T	checkNotNull(T o, String name)
static void	checkState(boolean isValid, String message) Precondition-style validation that throws IllegalStateException.
static void	checkState(boolean isValid, String message, Object... args) Precondition-style validation that throws IllegalStateException.

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

Type Parameters:

T - the type of the object

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 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 isValid,
                              String message)
                       throws IllegalStateException

Precondition-style validation that throws IllegalStateException.

Parameters:

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

message - A String message for the exception.

Throws:

IllegalStateException - if isValid is false

checkState

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

Precondition-style validation that throws IllegalStateException.

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:

IllegalStateException - if isValid is false