Package com.pushtechnology.diffusion.datatype.recordv2.schema

Interface Schema

public interface Schema

RecordV2 schema.

A schema describes data value format in terms of one or more record definitions. A record definition describes the layout of a record and comprises one or more field definitions.

Within the data value there can be multiple occurrences of a record or field described by a single definition. The defined (or allowed, when describing variable numbers) number of occurrences of each definition is referred to as its 'multiplicity'. The multiplicity can be fixed (the item occurs a fixed number of times), or variable (the item occurs from a minimum number of times to a maximum number of times). If a variable field is used it must be the last in a record definition and if a variable record is used it must be the last in the schema definition.

A field may be defined as of type 'string', 'integer' or 'decimal'. A decimal type has a further property of 'scale' which defines the number of digits to the right of the decimal point.

Since:

6.0

Author:

DiffusionData Limited

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	Schema.Field	Field Definition.
static interface	Schema.Node	Schema Node - A Schema.Record or a Schema.Field.
static interface	Schema.Record	Record Definition.

Method Summary

Modifier and Type	Method	Description
String	asJSONString()	Returns the schema in a JSON format.
MutableRecordModel	createMutableModel()	Create a mutable model based upon the schema.
List<Schema.Record>	getRecords()	Returns an immutable, ordered list of record definitions.

Method Details

getRecords

List<Schema.Record> getRecords()

Returns an immutable, ordered list of record definitions.

There will be at least one.

Returns:

a list of the record definitions in the schema

createMutableModel

MutableRecordModel createMutableModel()

Create a mutable model based upon the schema.

The model will be created with all mandatory record occurrences and all mandatory field occurrences initialized to default values.

Such a model may be mutated and used to generate updated RecordV2 occurrences for updating purposes.

Returns:

a new initialized model

asJSONString

String asJSONString()

Returns the schema in a JSON format.

Returns:

schema in JSON string format