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From "John Jenkins (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AVRO-1099) Int / Float cannot be decoded
Date Wed, 23 May 2012 23:55:41 GMT

    [ https://issues.apache.org/jira/browse/AVRO-1099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13282053#comment-13282053
] 

John Jenkins commented on AVRO-1099:
------------------------------------

Ok. That all makes sense. I don't know if this helps or not, but I played around with what
you suggested and this also breaks:

{code}

/**
 * This is a sample Avro schema for an entry with multiple possible types,
 */
private static final String DEFINITION = 
	"{" +
		"\"namespace\":\"test\"," +
		"\"type\":\"record\"," +
		"\"name\":\"DoubleTest\"," +
		"\"fields\":[" +
			"{" +
				"\"type\":[\"float\", \"int\"]," +
				"\"name\":\"DoubleValue\"" +
			"}" +
		"]" +
	"}";

/**
 * This is a sample record that matches the above schema.
 */
private static final String EXAMPLE_RECORD =
	"{" +
		"\"DoubleValue\":{\"float\":0}" + // Fails as it is not a "float".
	"}";

{code}

But, if I changed it to "0.0", it is fine. Thank you for looking into this.

John
                
> Int / Float cannot be decoded
> -----------------------------
>
>                 Key: AVRO-1099
>                 URL: https://issues.apache.org/jira/browse/AVRO-1099
>             Project: Avro
>          Issue Type: Bug
>          Components: java
>    Affects Versions: 1.6.3
>         Environment: Mac OS X 10.7.3. Eclipse IDE for Java EE Developers 1.4.2.20120213
>            Reporter: John Jenkins
>              Labels: patch
>
> I am currently using a JSON library that is encoding 0 for a double to "0" instead of
"0.0", without the quotes. First, I feel that "0" is a perfectly valid value for 0 as a double.
But, I tried to code around it by changing the "type" of the field to "["double", "int"]",
without the quotes and it is giving me this error:
> Exception in thread "main" org.apache.avro.AvroTypeException: Expected start-union. Got
VALUE_NUMBER_INT
> 	at org.apache.avro.io.JsonDecoder.error(JsonDecoder.java:697)
> 	at org.apache.avro.io.JsonDecoder.readIndex(JsonDecoder.java:441)
> 	at org.apache.avro.io.ResolvingDecoder.doAction(ResolvingDecoder.java:229)
> 	at org.apache.avro.io.parsing.Parser.advance(Parser.java:88)
> 	at org.apache.avro.io.ResolvingDecoder.readIndex(ResolvingDecoder.java:206)
> 	at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:148)
> 	at org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:173)
> 	at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:144)
> 	at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:135)
> If I change it to just "int", then it works for a few records until it reaches a double.
> Thank you,
> John

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