org.openanzo.glitter.query.validator
Class WellDesignedOptionalsValidator

java.lang.Object
  org.openanzo.glitter.query.validator.WellDesignedOptionalsValidator

All Implemented Interfaces:

QueryValidator

public class WellDesignedOptionalsValidator
extends java.lang.Object
implements QueryValidator

Rejects queries that contain an OPTIONAL that contains a variable that is not in the required part of the OPTIONAL but does appear some other place in the query.

Author:

lee

Constructor Summary

WellDesignedOptionalsValidator()

Method Summary

java.lang.String	getValidationError() This method's return value is only valid after a call to validateQuery on the same instance returns false.
java.lang.String	getValidatorDescription() Returns a human-readable description of what this QueryValidator checks for.
boolean	validateQuery(GraphPattern query)

Methods inherited from class java.lang.Object

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

Constructor Detail

WellDesignedOptionalsValidator

public WellDesignedOptionalsValidator()

Method Detail

getValidationError

public java.lang.String getValidationError()

Description copied from interface: QueryValidator

This method's return value is only valid after a call to validateQuery on the same instance returns false.

Specified by:

getValidationError in interface QueryValidator

Returns:

The reason for a failure to validate.

getValidatorDescription

public java.lang.String getValidatorDescription()

Description copied from interface: QueryValidator

Returns a human-readable description of what this QueryValidator checks for.

Specified by:

getValidatorDescription in interface QueryValidator

Returns:

A human-readable description of what this QueryValidator checks for.

validateQuery

public boolean validateQuery(GraphPattern query)

Specified by:

validateQuery in interface QueryValidator

Parameters:

query - The query pattern of the query to be validated

Returns:

True, if the query is OK; False, otherwise. If false, then getValidationError() may be called to return the reason for the failure to validate.