com.fdsapi.arrays
Class NullConditional

java.lang.Object
  |
  +--com.fdsapi.arrays.NullConditional

All Implemented Interfaces:

Conditional

public class NullConditional

extends java.lang.Object

implements Conditional

This class implements the null object design pattern for Conditionals. It is an implementation of the Null object design pattern and is used to end the decorator chain.

View Code

Constructor Summary

NullConditional()
Creates a new instance of NullConditional

Method Summary

java.lang.String	getType() Empty implementation
boolean	isTrue(java.lang.Object[] row) The NullConditional returns false always because its use is as a terminator in a decorator chain that tests for true false with an or condition.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NullConditional

public NullConditional()

Creates a new instance of NullConditional

Method Detail

isTrue

public boolean isTrue(java.lang.Object[] row)

The NullConditional returns false always because its use is as a terminator in a decorator chain that tests for true false with an or condition. By returning false the NullConditional can never incorrectly trigger a true condition. i.e. return this.isTrue(row) || nextConditional.isTrue(row); where if no conditional has been set nextConditional is the NullConditional.

Specified by:

isTrue in interface Conditional

getType

public java.lang.String getType()

Empty implementation

Specified by:

getType in interface Conditional

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object