org.apache.oozie.fluentjob.api

Class ModifyOnce<T>

java.lang.Object

org.apache.oozie.fluentjob.api.ModifyOnce<T>

Type Parameters:

T - the generic type that can be modified once, but only once

public class ModifyOnce<T>
extends Object

A generic wrapper class for a value that can be modified once after construction, but only once.

Constructor Summary

Constructors

Constructor and Description
ModifyOnce() Creates a new ModifyOnce object initialized to null.
ModifyOnce(T defaultData) Creates a new ModifyOnce object initialized to defaultData.

Method Summary

Modifier and Type	Method and Description
T	get() Returns the wrapped value.
void	set(T data) Sets the wrapped value.

Methods inherited from class java.lang.Object

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

Constructor Detail

ModifyOnce

public ModifyOnce()

Creates a new ModifyOnce object initialized to null.

ModifyOnce

public ModifyOnce(T defaultData)

Creates a new ModifyOnce object initialized to defaultData.

Parameters:

defaultData - The initial value of this ModifyOnce object.

Method Detail

get

public T get()

Returns the wrapped value.

Returns:

The wrapped value.

set

public void set(T data)

Sets the wrapped value. If it is not the first modification attempt, IllegalStateException is thrown.

Parameters:

data - The new data to store.

Throws:

IllegalStateException - if this is not the first modification attempt.