com.goldencode.p2j.util

Class Accumulator.ExternalDataSource

java.lang.Object

com.goldencode.p2j.util.Accumulator.ExternalDataSource

All Implemented Interfaces:

Resolvable

Enclosing class:

Accumulator

private static class Accumulator.ExternalDataSource
extends java.lang.Object
implements Resolvable

A data source implementation which expects to be fed its data from an external source.

Field Summary

Fields

Modifier and Type	Field and Description
private BaseDataType	datum Current data value
private java.lang.Class<? extends BaseDataType>	type The type of this source.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ExternalDataSource() Default c'tor.
private	ExternalDataSource(java.lang.Class<? extends BaseDataType> cls) This c'tor must provide the type of the values being accumulated.

Method Summary

Modifier and Type	Method and Description
java.lang.Class<? extends BaseDataType>	getType() Get the type of the current datum.
BaseDataType	resolve() Get the current data value.
(package private) void	setDatum(BaseDataType datum) Set the current data value, supplied by an external source.

Methods inherited from class java.lang.Object

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

Field Detail

datum

private BaseDataType datum

Current data value

type

private java.lang.Class<? extends BaseDataType> type

The type of this source.

Constructor Detail

ExternalDataSource

private ExternalDataSource()

Default c'tor.

ExternalDataSource

private ExternalDataSource(java.lang.Class<? extends BaseDataType> cls)

This c'tor must provide the type of the values being accumulated. In the case when no accumulation is performed, but the result needs to be retrieved, this the only way to determine the type.

Parameters:

cls - Data type of the value being accumulated.

Method Detail

resolve

public BaseDataType resolve()

Get the current data value.

Specified by:

resolve in interface Resolvable

Returns:

Current datum.

getType

public java.lang.Class<? extends BaseDataType> getType()

Get the type of the current datum.

Specified by:

getType in interface Resolvable

Returns:

Datum type.

setDatum

void setDatum(BaseDataType datum)

Set the current data value, supplied by an external source.

Parameters:

datum - Current data value.