acrites commented on code in PR #37631:
URL: https://github.com/apache/beam/pull/37631#discussion_r2830724212
##########
sdks/java/core/src/main/java/org/apache/beam/sdk/util/construction/CoderTranslators.java:
##########
@@ -177,6 +194,97 @@ public RowCoder fromComponents(
};
}
+ static <T> CoderTranslator<SchemaCoder<T>> schema() {
+ return new CoderTranslator<SchemaCoder<T>>() {
+ private static final String TO_ROW_FUNCTION_URN =
"beam:torowfn:javasdk:v1";
+ private static final String FROM_ROW_FUNCTION_URN =
"beam:fromrowfn:javasdk:v1";
+ private static final String TYPE_DESCRIPTOR_URN =
"beam:typedescriptor:javasdk:v1";
+
+ @Override
+ public ImmutableList<? extends Coder<?>> getComponents(SchemaCoder<T>
from) {
+ return ImmutableList.of();
+ }
+
+ @Override
+ public String getUrn(SchemaCoder<T> from, TranslationContext context) {
+ if (context instanceof TranslationContextWithOptions) {
+ PipelineOptions options =
+ ((TranslationContextWithOptions)
context).pipelineOptions().get();
+ if (StreamingOptions.updateCompatibilityVersionLessThan(options,
"2.72")) {
+ return CoderTranslation.JAVA_SERIALIZED_CODER_URN;
+ }
+ }
+ return CoderTranslation.getKnownCoderUrns()
+ .getOrDefault(from.getClass(),
CoderTranslation.JAVA_SERIALIZED_CODER_URN);
+ }
+
+ @Override
+ public byte[] getPayload(SchemaCoder<T> from, TranslationContext
context) {
+ if (context instanceof TranslationContextWithOptions) {
+ PipelineOptions options =
+ ((TranslationContextWithOptions)
context).pipelineOptions().get();
+ if (StreamingOptions.updateCompatibilityVersionLessThan(options,
"2.72")) {
+ return SerializableUtils.serializeToByteArray(from);
+ }
+ }
+ SchemaApi.SchemaCoderPayload.Builder payload =
SchemaApi.SchemaCoderPayload.newBuilder();
+ payload.setSchema(SchemaTranslation.schemaToProto(from.getSchema(),
true));
+ payload
+ .getToRowFnBuilder()
+ .setUrn(TO_ROW_FUNCTION_URN)
+ .setPayload(
+ ByteString.copyFrom(
+
SerializableUtils.serializeToByteArray(from.getToRowFunction())));
+ payload
+ .getFromRowFnBuilder()
+ .setUrn(FROM_ROW_FUNCTION_URN)
+ .setPayload(
+ ByteString.copyFrom(
+
SerializableUtils.serializeToByteArray(from.getFromRowFunction())));
+ payload
+ .addAdditionalCoderInfosBuilder()
+ .setUrn(TYPE_DESCRIPTOR_URN)
+ .setPayload(
+ ByteString.copyFrom(
+
SerializableUtils.serializeToByteArray(from.getEncodedTypeDescriptor())));
+ return payload.build().toByteArray();
+ }
+
+ @Override
+ public SchemaCoder<T> fromComponents(
+ List<Coder<?>> components, byte[] payload,
CoderTranslation.TranslationContext context) {
+ checkArgument(
Review Comment:
Added a `checkArgument`call.
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