[jira] Created: (AVRO-612) Schema.toString() strips out field docs

[David Rosenstrauch (JIRA)]

Schema.toString() strips out field docs
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                 Key: AVRO-612
                 URL: https://issues.apache.org/jira/browse/AVRO-612
             Project: Avro
          Issue Type: Bug
    Affects Versions: 1.3.3
            Reporter: David Rosenstrauch
            Priority: Minor


Although avro can successfully parse schema text that contains a "doc" on a 
Schema.Field, when a Schema containing a field doc is serialized (via 
Schema.toString()) the doc does not get written.

The following JUnit test case demonstrates this problem:
{code:title=TestAvroFieldDocSerialization.java|borderStyle=solid}
import junit.framework.TestCase;

import org.apache.avro.Schema;

public class TestAvroFieldDocSerialization extends TestCase {

        public void testAvroFieldDocSerialization() {
                String schemaStr =
                        "{"+
                        "       \"name\": \"Rec\","+
                        "       \"type\": \"record\","+
                        "       \"fields\" : ["+
                        "               {\"name\": \"f\", \"type\": \"int\", 
\"doc\": \"test\"}"+
                        "       ]"+
                        "}";
                Schema schema = Schema.parse(schemaStr);
                verifyFieldDoc(schema);

                schemaStr = schema.toString();
                schema = Schema.parse(schemaStr);
                verifyFieldDoc(schema);
        }

        private void verifyFieldDoc(Schema schema) {
                Schema.Field field = schema.getField("f");
                assertEquals("test", field.doc());
        }
}
{code}

Note that the first call to verifyFieldDoc() succeeds, while the second one 
fails.  They should both succeed (in my opinion).

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