Apache Commons Collections 4.4 · org.apache.commons.collections4.functors.ConstantFactory

Factory implementation that returns the same constant each time.

No check is made that the object is immutable. In general, only immutable objects should use the constant factory. Mutable objects should use the prototype factory.

Field Summary

Modifier and Type	Field and Description
private final T	iConstant The closures to call in turn
public static final Factory<T>	NULL_INSTANCE Returns null each time
private static final long	serialVersionUID Serial version UID

Constructor Summary

Access	Constructor and Description
public	ConstantFactory(final T the constant to return each time constantToReturn) Constructor that performs no validation.

Method Summary

Modifier and Type	Method and Description
public static < the type of the constant T> Factory<T>	Returns: the `constant` factory. constantFactory(final T the constant object to return each time in the factory constantToReturn) Factory method that performs validation.
public T	Returns: the stored constant value create() Implements org.apache.commons.collections4.Factory.create. Always return constant.
public T	Returns: the constant getConstant() Gets the constant.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

iConstant	back to summary
private final T iConstant The closures to call in turn

NULL_INSTANCE	back to summary
public static final Factory<T> NULL_INSTANCE Returns null each time Annotations @SuppressWarnings:rawtypes

serialVersionUID	back to summary
private static final long serialVersionUID Serial version UID

Constructor Detail

ConstantFactory back to summary

ConstantFactory	back to summary
public ConstantFactory(final T constantToReturn) Constructor that performs no validation. Use `constantFactory` if you want that. Parameters constantToReturn:T the constant to return each time

public ConstantFactory(final T constantToReturn)

Constructor that performs no validation. Use constantFactory if you want that.

Parameters

constantToReturn:T: the constant to return each time

Method Detail

constantFactory back to summary

constantFactory	back to summary
public static <T> Factory<T> constantFactory(final T constantToReturn) Factory method that performs validation. Parameters <T> the type of the constant constantToReturn:T the constant object to return each time in the factory Returns:Factory<T> the `constant` factory.

public static <T> Factory<T> constantFactory(final T constantToReturn)

Factory method that performs validation.

Parameters

<T>: the type of the constant
constantToReturn:T: the constant object to return each time in the factory

Returns:Factory<T>

the constant factory.

create	back to summary
public T create() Implements org.apache.commons.collections4.Factory.create. Always return constant. Returns:T the stored constant value Annotations @Override

create

back to summary

public T create()

Implements org.apache.commons.collections4.Factory.create.

Always return constant.

Returns:T

the stored constant value

Annotations