是否可以在具有Avro的地图中使用非字符串作为键？
我发现了这个问题AVRO-680，该问题声称已添加了非字符串键支持，但是我找不到任何示例，也无法从补丁中弄清楚新支持如何与模式一起使用。
我想做这样的事情：
"name": "aThing","type": "record","fields": [
{ "name": "aMapOfThings","type": {
"type": "map","keys": "MyKeyType","values": "MyValueType"
}
}
]
或在avdl中：
record aThing {
map<MyKeyType,MyValueType> aMapOfThings = [:];
}
就像这样的protobuf问题：Protobuf objects as Keys in Maps
从PR来看，此增强功能并不是专门为SpecificRecord设计的。看起来，代码更改和测试集中在GenericRecord上，并通过反射从包含非字符串键的map的Java类中得出模式信息。
下面是从POJO派生的模式的示例，该POJO的Map包含非字符串键（来自TestNonStringMapKeys.java）。请注意，它是一个记录数组，而不是map类型：
{
"type" : "record","name" : "Company","namespace" : "org.apache.avro.reflect","fields" : [ {
"name" : "employees","type" : [ "null",{
"type" : "array","items" : {
"type" : "record","name" : "Pair487429dd20c65898","fields" : [ {
"name" : "key","type" : {
"type" : "record","name" : "EmployeeId","fields" : [ {
"name" : "id","int" ],"default" : null
} ]
}
},{
"name" : "value","name" : "EmployeeInfo","fields" : [ {
"name" : "name","string" ],"default" : null
} ]
}
} ]
},"java-class" : "java.util.HashMap"
} ],"default" : null
} ]
}