填充嵌套的Avro模式

Question

这是模式：

    {
      "type" : "record",
      "name" : "avro_schema",
      "namespace" : "avro",
      "doc" : "The generic avro schema used by publishers to publish events 
      "fields" : [ 

          {"name" : "event", 
                        "type" : {
                             "type" : "record",
                             "name" : "event_meta_data",
                             "fields" : [
                                {"name" : "event_name", 
                                 "type" : "string", 
                                 "doc" : "The name of the event.  In the CDC, this field is populated with the name of the data base table or segment."},

                                {"name" : "operation_type", 
                                 "type" : "string", 
                                "doc": "The operation or action that triggered the event.  e.g., Insert, Update, Delete, etc."},

                                {"name" : "transaction_identifier", 
                                 "type" : ["string", "null"], 
                                 "default" : "NONE",
                                "doc" : "A unique identifier that identifies a unit or work or transaction.  Useful in relating multiple events together."},

                                {"name" : "event_publication_timestamp_millis", 
                                 "type" : "string", 
                                "doc": "timestamp when the event was published"},

                                {"name" : "event_publisher", 
                                 "type" : "string", 
                                "doc" : "The system or application that published the event"},

                                {"name" : "event_publisher_identity",
                                "type": ["string", "null"],
                                "default" : "NONE",
                                "doc": "The identity (user) of the system or application that published the event"},

                                 {"name" : "event_timestamp_millis", 
                                 "type" : ["string", "null"],
                                 "default" : "NONE",
                                "doc": "timestamp when the event occured"},

                                {"name": "event_initiator",
                                "type": ["string", "null"],
                                "default" : "NONE",
                                "doc" : "The system or application that initiated the event"},

                                {"name": "event_initiator_identity",
                                "type" : ["string", "null"],
                                "default" : "NONE",
                                "doc": "The system id or application id that initiated the event" }


                              ]},
                              "doc" : "The data about the published event"
          },
          { "name" : "contents",
                        "type" : {
                            "name": "data_field_groups",
                            "type": "array",
                            "items": {
                                "type": "record",
                                "name": "data_field_group",
                                "fields" : [
                                    {"name": "data_group_name",
                                     "type": "string"
                                    },
                                    {
                                    "name": "data_fields",
                                    "type": {
                                        "type": "array",
                                        "items": {
                                            "name": "data_field",
                                            "type":  "record",
                                            "fields":[
                                                {"name" : "data_field_name",
                                                  "type" : "string",
                                                  "doc" : "The field name"},  

                                                {"name": "data_field_type",
                                                "type": "string",
                                                "doc" : "The data type is one of the following values: string, boolean, int, long, float, double or bytes"},

                                                {"name" : "data_field_value",
                                                 "type" : ["string", "boolean", "int", "long", "float", "double","bytes", "null"],
                                                  "doc" : "The value"}
                                            ]
                                        }

                                    }

                                }
                            ]
                        }
                        },
                        "doc" : "The datafields for the for the published event"
          } 
      ]
    }

---

            Schema schema = new Schema.Parser().parse(new File("resources/v2.avsc"));


    GenericRecord AvroRec = new GenericData.Record(schema);
            GenericRecord event = new GenericData.Record(schema.getField("event").schema());
            //GenericRecord contents = new GenericData.Record(schema.getTypes().));
            Schema contents = schema.getField("contents").schema();

            GenericArray <GenericRecord> people = new GenericData.Array<GenericRecord>(3, contents);

            Schema contentSchema = contents.getElementType();

在cricket_007的帮助下，我可以在最后一行之后继续前进一点，因为我必须创建另一个数组记录，因为它里面有另一个数组。 或者，应该能够设置记录，该语句使我对记录格式的了解不多，但却无法弥补。

System.out.println(contents.getElementType().getFields());

Answer 1

这是一个数组。

尝试制作GenericData.Array

如何填充内容的数据

数组有一个添加方法