Class ConstantFactory
java.lang.Object
org.apache.commons.collections.functors.ConstantFactory
- All Implemented Interfaces:
Serializable
,Factory
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.
- Since:
- Commons Collections 3.0
- Version:
- $Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
- See Also:
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Field Summary
Fields -
Constructor Summary
ConstructorsConstructorDescriptionConstantFactory
(Object constantToReturn) Constructor that performs no validation. -
Method Summary
Modifier and TypeMethodDescriptioncreate()
Always return constant.Gets the constant.static Factory
getInstance
(Object constantToReturn) Factory method that performs validation.
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Field Details
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serialVersionUID
private static final long serialVersionUIDSerial version UID- See Also:
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NULL_INSTANCE
Returns null each time -
iConstant
The closures to call in turn
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Constructor Details
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ConstantFactory
Constructor that performs no validation. UsegetInstance
if you want that.- Parameters:
constantToReturn
- the constant to return each time
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Method Details
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getInstance
Factory method that performs validation.- Parameters:
constantToReturn
- the constant object to return each time in the factory- Returns:
- the
constant
factory.
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create
Always return constant. -
getConstant
Gets the constant.- Returns:
- the constant
- Since:
- Commons Collections 3.1
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