Package net.morimekta.providence.graphql.gql

Interface GQLFragment

  • All Superinterfaces:
    GQLSelection
    All Known Implementing Classes:
    GQLFragmentDefinition, GQLFragmentReference, GQLInlineFragment
    public interface GQLFragment
extends GQLSelection
    A fragment is a piece of a field list representing a single type as part of a struct, union, union list, interface list etc. E.g. consider the graphql type structure: 
    
 interface Character {
     name: String!
     appears_in: [Movie!]!
 }
 type Human implements Character {
     height: Float!
 }
 type Droid implements Character {
     purpose: String!
 }
 union CharacterUnion = Human | Droid
 type Query {
   hero: CharacterUnion
 }
    And the query document: 
    
 {
     hero {
         name
         ... on Droid {
             purpose
         }
         ... HumanFields
     }
 }

 fragment HumanFields on Human {
     height
 }
    Here ...of Droid is an inline fragment, and HumanFields is a fragment reference and definition.

    • Method Detail

      • getTypeCondition

        @Nonnull
net.morimekta.providence.descriptor.PMessageDescriptor<?> getTypeCondition()
        All fragments represent a specific message type of a union field, or an interface implementation. This should return the descriptor of that message type.
        Returns:
        The fragment type descriptor.

      • isApplicableFor

        default boolean isApplicableFor​(net.morimekta.providence.descriptor.PMessageDescriptor containingType)
        Parameters:
        containingType - Containing type to check.
        Returns:
        True if the fragment should be applied when writing content for the containing message type.