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java.lang.Objectorg.ow2.bonita.util.Final<T>
T
- public class Final<T>
This class provides an efficient way --- using hardware
instructions if available --- for holding a variable that can only
be initialized once (aka: final variables).
This class helps when it is not possible to declare a variable as
final
but still, you need it to be initialized only
once (e.g: in a setter).
Note that you cannot initialize a variable to null
using this class.
This class is thread safe.
Constructor Summary | |
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Final()
|
Method Summary | |
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T |
get()
Return the value of the initialized variable. |
protected T |
getValue()
Return the current value of this variable. |
void |
init(T t)
Initialize this variable to the given value. |
boolean |
isInitialized()
Check the initialized status of this final variable. |
protected void |
setValue(T t)
Set the value of this variable directly. |
java.lang.String |
toString()
|
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public Final()
Method Detail |
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public java.lang.String toString()
toString
in class java.lang.Object
protected T getValue()
protected void setValue(T t)
t
- the value to set this variable to.public void init(T t)
t
- the value
java.lang.IllegalArgumentException
- if the given value is null
java.lang.IllegalStateException
- if the variable has already been set.public T get()
public boolean isInitialized()
true
if this final variable has been initialized,
false
otherwise.
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