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Java Source Code / Java Documentation » Library » Apache common Collections » org.apache.commons.collections.functors

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.apache.commons.collections.functors .ConstantTransformer

ConstantTransformer
public class ConstantTransformer implements Transformer,Serializable(Code)
	Transformer 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: 348444 $ $Date: 2005-11-23 14:06:56 +0000 (Wed, 23 Nov 2005) $ author: Stephen Colebourne

Field Summary
final public static Transformer	NULL_INSTANCE

Constructor Summary
public	ConstantTransformer(Object constantToReturn) Constructor that performs no validation.

Method Summary
public Object	getConstant() Gets the constant.
public static Transformer	getInstance(Object constantToReturn) Transformer method that performs validation.
public Object	transform(Object input) Transforms the input by ignoring it and returning the stored constant instead.

Field Detail

NULL_INSTANCE
final public static Transformer NULL_INSTANCE(Code)
	Returns null each time

Constructor Detail

ConstantTransformer
public ConstantTransformer(Object constantToReturn)(Code)
	Constructor that performs no validation. Use `getInstance` if you want that. Parameters: constantToReturn - the constant to return each time

Method Detail

getConstant
public Object getConstant()(Code)
	Gets the constant. the constant since: Commons Collections 3.1

getInstance
public static Transformer getInstance(Object constantToReturn)(Code)
	Transformer method that performs validation. Parameters: constantToReturn - the constant object to return each time in the factory the `constant` factory.

transform
public Object transform(Object input)(Code)
	Transforms the input by ignoring it and returning the stored constant instead. Parameters: input - the input object which is ignored the stored constant

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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