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org.eclipse.gmf.runtime.common.core.util
Interface INullObject

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public interface INullObject

A specification of classes that implement the Null Object pattern. Implementors of this interface have a unique instance that represents a pointer-safe null. The interpretation of null may vary; it may mean absence of a value, invalid value, etc.

API clients should not implement this interface.

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Method Summary
boolean	isNull ()           Queries whether this is the null instance of a given implementation class.

 

Method Detail

isNull

boolean isNull()

Queries whether this is the null instance of a given implementation class. The null instance must be unique.

Returns:

true if I am the special "null" instance; false, otherwise

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