Module datarush.library

Package com.pervasive.datarush.tokens

package com.pervasive.datarush.tokens

Provides classes and utilities for working with data tokens. Tokens are the fundamental data units within DataRush.

Operators are connected to one another consuming and emitting tokens via ports. All tokens have two properties:

• a data type
• a value, potentially unset. If unset, the token is called null valued.

There are two types of tokens. Scalar tokens are atomic, having a scalar type. Composite tokens, representing record data, consist of one or more scalar tokens, each representing a field of the record. These have a record type, describing the record schema.

Related Packages

Package	Description
com.pervasive.datarush.tokens.record	Provides implementations of and utilities for record valued tokens.
com.pervasive.datarush.tokens.scalar	Provides implementations of and utilities for scalar valued tokens.

Class	Description
DataRegister	A mutable TokenValued object.
DataRepresentation	Controls the representation of a dataset.
DataRepresentation.Base	The default value that is assumed for unspecified values.
DataToken	An immutable TokenValued object.
DefaultModificationCountProvider	Provides a change number sequence which is manually managed.
InputModificationCountProvider	A change sequence derived from an input port.
ModificationCountProvider	A monotonically increasing sequence of change numbers.
RetargetableObject	Represents a position in some sequence.
TokenComparator	An object for comparing tokens of compatible types.
TokenComparators	A factory for creating TokenComparator objects.
TokenConverter	An object capable of converting tokens into other formats.
TokenConverters	A factory for creating TokenConverter objects.
TokenOrder	An ordering of token values.
TokenPusher	An object capable of transferring a token from a random-access source to a target.
TokenRegisters	A factory for creating DataRegister objects.
TokenSettable	An object holding a nullable data value which is mutable.
TokenSorter	An object capable of producing a sort order permutation of a TokenSequence.
TokenUtils	Utilities for working with token values.
TokenValued	An representation of a nullable data value.