Class ConstantFactory
- java.lang.Object
-
- org.apache.commons.collections.functors.ConstantFactory
-
- All Implemented Interfaces:
java.io.Serializable
,Factory
public class ConstantFactory extends java.lang.Object implements Factory, java.io.Serializable
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:
- Serialized Form
-
-
Field Summary
Fields Modifier and Type Field Description private java.lang.Object
iConstant
The closures to call in turnstatic Factory
NULL_INSTANCE
Returns null each timeprivate static long
serialVersionUID
Serial version UID
-
Constructor Summary
Constructors Constructor Description ConstantFactory(java.lang.Object constantToReturn)
Constructor that performs no validation.
-
Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
create()
Always return constant.java.lang.Object
getConstant()
Gets the constant.static Factory
getInstance(java.lang.Object constantToReturn)
Factory method that performs validation.
-
-
-
Field Detail
-
serialVersionUID
private static final long serialVersionUID
Serial version UID- See Also:
- Constant Field Values
-
NULL_INSTANCE
public static final Factory NULL_INSTANCE
Returns null each time
-
iConstant
private final java.lang.Object iConstant
The closures to call in turn
-
-
Method Detail
-
getInstance
public static Factory getInstance(java.lang.Object constantToReturn)
Factory method that performs validation.- Parameters:
constantToReturn
- the constant object to return each time in the factory- Returns:
- the
constant
factory.
-
create
public java.lang.Object create()
Always return constant.
-
getConstant
public java.lang.Object getConstant()
Gets the constant.- Returns:
- the constant
- Since:
- Commons Collections 3.1
-
-