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 and Description
MessageIndexFinder()

Method Summary

Modifier and Type	Method and Description
protected 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 Detail

MessageIndexFinder

public MessageIndexFinder()

Method Detail

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

protected 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