Package org.anchoranalysis.mpp.proposer.error

Class ErrorNodeNull

Object

org.anchoranalysis.mpp.proposer.error.ErrorNode

org.anchoranalysis.mpp.proposer.error.ErrorNodeNull

All Implemented Interfaces:

Serializable

public class ErrorNodeNull
extends ErrorNode

A singleton implementation of ErrorNode that does nothing with errors.

This class implements the Null Object pattern for ErrorNode, allowing error handling to be safely ignored when desired.

Author:

Owen Feehan

See Also:

Serialized Form

Method Summary

Modifier and Type	Method	Description
ErrorNode	add(String errorMessage)	Adds an error message to this node.
static ErrorNodeNull	instance()	Gets the singleton instance of ErrorNodeNull.

Methods inherited from class java.lang.Object

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

Method Details

instance

public static ErrorNodeNull instance()

Gets the singleton instance of ErrorNodeNull.

Returns:

the ErrorNodeNull instance

add

public ErrorNode add(String errorMessage)

Description copied from class: ErrorNode

Adds an error message to this node.

Specified by:

add in class ErrorNode

Parameters:

errorMessage - the error message to add

Returns:

the current ErrorNode instance for method chaining