[AVRO-1592] Java keyword as an enum constant in Avro schema file causes deserialization to fail.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.7
• Fix Version/s: 1.8.0
• Component/s: java

Environment

CentOS, Java 1.7

• Assignee: Lukas Steiblys
• Reporter: Lukas Steiblys
• Created: 08/Oct/14 23:21
• Updated: 01/Feb/16 14:55
• Resolved: 08/Nov/14 00:54

Description

The schema

{"type": "enum", "name": "ButtonTypeID", "symbols": ["default", "keyboard"]}

generates the following class:

public final class ButtonTypeID extends java.lang.Enum<ButtonTypeID> {
public static final ButtonTypeID default$;
public static final ButtonTypeID keyboard;
public static final org.apache.avro.Schema SCHEMA$;
public static ButtonTypeID[] values();
public static ButtonTypeID valueOf(java.lang.String);
public static org.apache.avro.Schema getClassSchema();
static {};
}

(this is what “javap ButtonTypeID.class” produces)

When I try to read my data that has the “default” value for ButtonTypeID, I get the exception:

java.lang.IllegalArgumentException: No enum constant ButtonTypeID.default
at java.lang.Enum.valueOf(Enum.java:236)
at org.apache.avro.specific.SpecificData.createEnum(SpecificData.java:106)
at org.apache.avro.generic.GenericDatumReader.createEnum(GenericDatumReader.java:205)...

Since "default" is a keyword in java, the $ is appended to the constant, but that is not taken into account when reading the data back, causing the ButtonTypeID.valueOf("default") method to fail.