DataSet class
DataSet is a dynamic generic DTO.
DataSet can represent a data structure that summarizes multiple forms. A report usually has a header part, which is a one-dimensional data structure, and a table part, which is a two-dimensional data structure.
The header part is represented by Record and the table part is represented by RecordList. DataSet can have multiple names for each of Record, which is a header, and RecordList, which is a table.
For example
import 'package:nimbus4flutter/nimbus4flutter.dart';
DataSet dataSet = DataSet("CurriculumVitae");
dataSet.setHeaderSchema(
RecordSchema(
[
FieldSchema<String>("name"),
FieldSchema<int>("age")
]
),
"User"
);
dataSet.setRecordListSchema(
RecordSchema(
[
FieldSchema<String>("title"),
FieldSchema<String>("description"),
FieldSchema<DateTime>("from"),
FieldSchema<DateTime>("to")
]
),
"Career"
);
Record userHeader = dataSet.getHeader("User");
userHeader["name"] = "hoge";
userHeader["age"] = 20;
RecordList careerList = dataSet.getRecordList("Career");
careerList.add(
careerList.createRecord(
{
"title":"career1",
"description":"description1",
"from":DateFormat('yyyy/MM/dd').parse("2020/01/01"),
"to":DateFormat('yyyy/MM/dd').parse("2020/01/30")
}
)
);
careerList.add(
careerList.createRecord(
{
"title":"career2",
"description":"description2",
"from":DateFormat('yyyy/MM/dd').parse("2020/02/01"),
"to":DateFormat('yyyy/MM/dd').parse("2020/02/15")
}
)
);
- Implementers
Constructors
- DataSet(String? name)
- DataSet.empty()
Properties
Methods
-
clear(
) → void - Clear the data. The set schema information will not be cleared.
-
clone(
[bool isDeep = false]) → DataSet - Clone the data.
-
cloneEmpty(
) → DataSet -
createNestedRecord(
String name) → Record - Creates a nested Record with the specified name.
-
createNestedRecordList(
String name) → RecordList - Creates a nested RecordList with the specified name.
-
fromList(
Map< String, dynamic> ? map, {bool isListHeader = true, bool isListRecordList = true}) → DataSet - Read DataSet from the Map which has Record and RecordList expressed in List format.
-
fromMap(
Map< String, Object?> ? map) → DataSet - Read DataSet from the Map which has Record and RecordList expressed in Map format.
-
getHeader(
[String? name]) → Record? - Get the header of the specified name.
-
getRecordList(
[String? name]) → RecordList? - Get the list of the specified name.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
setHeader(
Record record, [String? name]) → void - Set the header of the specified name to the specified value.
-
setHeaderSchema(
RecordSchema schema, [String? name]) → void - Define the schema of the header part Record, which is a one-dimensional data structure.
-
setNestedRecordListSchema(
RecordSchema schema, String name) → void - Define a schema for RecordList to be nested as a field in Record or RecordList.
-
setNestedRecordSchema(
RecordSchema schema, String name) → void - Define a schema for Record to be nested as a field in Record or RecordList.
-
setRecordList(
RecordList list, [String? name]) → void - Set the lsit of the specified name to the specified value.
-
setRecordListSchema(
RecordSchema schema, [String? name]) → void - Define the schema of the list part RecordList, which is a two-dimensional data structure.
-
toList(
{bool hasNull = true, bool isOutputSchema = false, bool toJsonType = false, bool isListHeader = true, bool isListRecordList = true}) → Map< String, Object> - Outputs a map with Record and RecordList expressed in List format.
-
toMap(
{bool hasNull = true, bool isOutputSchema = false, bool toJsonType = false}) → Map< String, Object> - Outputs a map with Record and RecordList expressed in Map format.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited