congbobo184 commented on a change in pull request #9481:
URL: https://github.com/apache/pulsar/pull/9481#discussion_r572722501
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File path:
pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/generic/GenericAvroWriter.java
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@@ -52,4 +67,29 @@ public GenericAvroWriter(Schema schema) {
this.byteArrayOutputStream.reset();
}
}
+
+ /**
+ * This is an adapter from Pulsar GenericRecord to Avro classes.
+ */
+ private class GenericRecordAdapter extends SpecificRecordBase {
+ private GenericRecord message;
+
+ void setCurrentMessage(GenericRecord message) {
+ this.message = message;
+ }
+ @Override
+ public Schema getSchema() {
+ return schema;
+ }
+
+ @Override
+ public Object get(int field) {
+ return message.getField(schema.getFields().get(field).name());
+ }
+
+ @Override
+ public void put(int field, Object value) {
+ throw new UnsupportedOperationException();
+ }
+ }
Review comment:
why we make `GenericRecordAdapter` extend `SpecificRecordBase` not
`GenericRecord `, seem `private final
GenericDatumWriter<org.apache.avro.generic.GenericRecord> writer;` only can
write `GenericRecord` not `SpecificRecordBase`.
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