Package com.amazonaws.services.schemaregistry.serializers.protobuf

Class MessageIndexFinder

java.lang.Object
com.amazonaws.services.schemaregistry.serializers.protobuf.MessageIndexFinder
public class MessageIndexFinder extends Object
MessageIndexFinder finds the position of message type in the overall schema. This position is used to serialize / deserialize the correct Message type.

  • Constructor Summary

    Constructors
    Constructor
    Description
    MessageIndexFinder()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    com.google.common.collect.BiMap<com.google.protobuf.Descriptors.Descriptor,Integer>
    getAll(com.google.protobuf.Descriptors.FileDescriptor schemaDescriptor)
    Parse the Protobuf Schema descriptor using level-order traversal, sort the descriptors lexicographically and assign an index for each message type.
    Integer
    getByDescriptor(com.google.protobuf.Descriptors.FileDescriptor schemaDescriptor, com.google.protobuf.Descriptors.Descriptor descriptorToFind)
    Parses the given Schema descriptor, assigns indices and finds the index for the given descriptor.
    com.google.protobuf.Descriptors.Descriptor
    getByIndex(com.google.protobuf.Descriptors.FileDescriptor schemaDescriptor, @NonNull Integer indexToFind)
    Parses the given Schema descriptor, assigns indices and finds the descriptor for given Index.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • MessageIndexFinder

      public MessageIndexFinder()

  • Method Details

    • getByDescriptor

      public Integer getByDescriptor(@NonNull com.google.protobuf.Descriptors.FileDescriptor schemaDescriptor, @NonNull com.google.protobuf.Descriptors.Descriptor descriptorToFind)
      Parses the given Schema descriptor, assigns indices and finds the index for the given descriptor.
      Parameters:
      schemaDescriptor - Protobuf Schema Descriptor
      descriptorToFind - Protobuf Descriptor to find.
      Returns:
      Index Integer.

    • getByIndex

      public com.google.protobuf.Descriptors.Descriptor getByIndex(@NonNull com.google.protobuf.Descriptors.FileDescriptor schemaDescriptor, @NonNull @NonNull Integer indexToFind)
      Parses the given Schema descriptor, assigns indices and finds the descriptor for given Index.
      Parameters:
      schemaDescriptor - Protobuf Schema Descriptor
      indexToFind - Index for the descriptor.
      Returns:
      descriptor Protobuf descriptor matching the index.

    • getAll

      public com.google.common.collect.BiMap<com.google.protobuf.Descriptors.Descriptor,Integer> getAll(@NonNull com.google.protobuf.Descriptors.FileDescriptor schemaDescriptor)
      Parse the Protobuf Schema descriptor using level-order traversal, sort the descriptors lexicographically and assign an index for each message type.

      TODO: Referencing other proto schemas using import statements is not supported yet. https://github.com/awslabs/aws-glue-schema-registry/issues/32

      Example: message B { message C { } message A { message D { } } }

      Assigned indices: B = 0, B.A = 1, B.A.D = 2, B.C = 3

      Parameters:
      schemaDescriptor - Protobuf Schema Descriptor.
      Returns:
      Set of MessageIndex