Hello,
I create a "Person" record (3 fields: first,last,age), and an "Extract" record
(2 fields: first,last). Then I use "Person" to write some object to a file.
When I use "Extract" to read data from the file, I got an exception: Exception
in thread "main" java.lang.ArrayIndexOutOfBoundsException: -14.
It seems like GenericDatumReader.readRecord won't skip the last fields. How can
I read the data corretly?
My code is below:
public void browseName() throws IOException {
List<Field> fields = new ArrayList<Field>();
fields.add(new Field("First", Schema.create(Type.STRING), null, null));
fields.add(new Field("Last", Schema.create(Type.STRING), null, null));
Schema extractSchema = Schema.createRecord(fields);
DataFileReader<Record> reader = new DataFileReader<Record>(new File(
fileName), new GenericDatumReader<Record>(extractSchema));
try {
while (reader.hasNext()) {
Record person = reader.next();
System.out.print(person.get("First").toString() + " " +
person.get("Last").toString() + "\t");
}
} finally {
reader.close();
}
}
Regards,
2010-04-13
Lurga
