Package graphql.validation.rules

Interface ValidationRule

All Known Subinterfaces:

DirectiveConstraint

All Known Implementing Classes:

AbstractDirectiveConstraint, AbstractNotEmptyRule, AbstractSizeConstraint, AssertFalseConstraint, AssertTrueConstraint, ContainerNotEmptyConstraint, ContainerSizeConstraint, DecimalMaxConstraint, DecimalMinConstraint, DigitsConstraint, ExpressionConstraint, MaxConstraint, MinConstraint, NegativeConstraint, NegativeOrZeroConstraint, NotBlankRule, NotEmptyRule, PatternConstraint, PositiveConstraint, PositiveOrZeroConstraint, RangeConstraint, SizeConstraint

@PublicSpi
public interface ValidationRule

A validation rule is code that can be applied inside a ValidationEnvironment and produce a list of zero or more GraphQLErrors as validation.

Method Summary

Modifier and Type	Method	Description
boolean	appliesTo(graphql.schema.GraphQLArgument argument, graphql.schema.GraphQLFieldDefinition fieldDefinition, graphql.schema.GraphQLFieldsContainer fieldsContainer)	This is called to work out if this rule applies to the argument of a specified field
boolean	appliesTo(graphql.schema.GraphQLFieldDefinition fieldDefinition, graphql.schema.GraphQLFieldsContainer fieldsContainer)	This is called to work out if this rule applies to a specified field
java.util.List<graphql.GraphQLError>	runValidation(ValidationEnvironment validationEnvironment)	This is called to runs the rule.

Method Detail

appliesTo

boolean appliesTo(graphql.schema.GraphQLFieldDefinition fieldDefinition,
                  graphql.schema.GraphQLFieldsContainer fieldsContainer)

This is called to work out if this rule applies to a specified field

Parameters:

fieldDefinition - the field to check

fieldsContainer - the field container

Returns:

true if this rule applies to the field

appliesTo

boolean appliesTo(graphql.schema.GraphQLArgument argument,
                  graphql.schema.GraphQLFieldDefinition fieldDefinition,
                  graphql.schema.GraphQLFieldsContainer fieldsContainer)

This is called to work out if this rule applies to the argument of a specified field

Parameters:

argument - the argument to check

fieldDefinition - the field to check

fieldsContainer - the field container

Returns:

true if this rule applies to the argument of the field field

runValidation

java.util.List<graphql.GraphQLError> runValidation(ValidationEnvironment validationEnvironment)

This is called to runs the rule. A rule maybe invoked MULTIPLE times per field. It will be invoked once for the original field, then invoked for each of the arguments on a field and then if the input types are complex ones such as GraphQLInputObjectType then it will be invoked for each attribute of that type.

A rule should consult ValidationEnvironment.getValidatedElement() to check what element is being validated. If the rule does not handle that type of element, simply return an empty list of errors.

Parameters:

validationEnvironment - the validation environment

Returns:

a non null list of errors where emptyList() means its valid