nivance created AVRO-1440:
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Summary: the problem of resolving schema
Key: AVRO-1440
URL: https://issues.apache.org/jira/browse/AVRO-1440
Project: Avro
Issue Type: Bug
Components: java
Affects Versions: 1.7.5
Environment: jdk1.7.0_45
Reporter: nivance
In Apache Avro™ 1.7.5 Documentation, have a sentence like this:
{quote}Since both client and server both have the other's full schema,
correspondence between same named fields, missing fields, extra fields, etc.
can all be easily resolved.{quote}
*h1.But if client has two fields and server has three fields, the server can't
resolve.*
*h3Client avsc:*
{"type":"record",
"name":"UserLess",
"namespace":"com.joyveb.test.bean",
"fields":
[{"name":"name","type":"string"},
{"name":"favoritenumber","type":"int"}]}
*serialize codes:*
ByteArrayOutputStream bao = new ByteArrayOutputStream();
GenericDatumWriter<Object> w = new
GenericDatumWriter<Object>(userLess.getSchema());
Encoder e = EncoderFactory.get().binaryEncoder(bao, null);
w.write(object, e);
e.flush();
ByteBuffer.wrap(bao.toByteArray());
*h3Server avsc:*
{"type":"record",
"name":"UserMore",
"namespace":"com.joyveb.test.bean",
"fields":
[{"name":"name","type":"string"},
{"name":"favoritenumber","type":"int"},{"name":"favoritecolor","type":"string"}]}
*deserialize codes:*
BinaryDecoder in = DecoderFactory.get().binaryDecoder(bytes, null);
Object result = new GenericDatumReader<Object>(userMore.getSchema()).read(null,
in);
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