io.github.privacystreams.core.transformations.group

Class GroupItem

java.lang.Object

io.github.privacystreams.core.Item

io.github.privacystreams.core.transformations.group.GroupItem

@PSItem
public final class GroupItem
extends Item

An item in a stream after grouping operation. GroupItem cannot be produced directly, instead, it can be generated using `groupBy` or `localGroupBy` operators. An GroupItem contains two initial fields: 1. The field name is the same as the field used to group (e.g. the 1st parameter of `groupBy`), and the value is the field value; 2. The field name is `grouped_items`, and the value is a list of the grouped items. More fields can be produced with `setGroupField` operators.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	GROUPED_ITEMS A list of the grouped items.

Fields inherited from class io.github.privacystreams.core.Item

EOS, TIME_CREATED

Method Summary

Methods inherited from class io.github.privacystreams.core.Item

containsField, equals, excludeFields, getAsBoolean, getAsDouble, getAsFloat, getAsInteger, getAsLong, getAsString, getValueByField, includeFields, isEndOfStream, setFieldValue, toDebugString, toJson, toMap, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

GROUPED_ITEMS

@PSItemField(type=java.util.List.class)
public static final java.lang.String GROUPED_ITEMS

A list of the grouped items.

See Also:

Constant Field Values