com.devexperts.qd.qtp.fieldreplacer

Class SetFieldReplacerFactory

java.lang.Object

com.devexperts.qd.qtp.fieldreplacer.SetFieldReplacerFactory

All Implemented Interfaces:

FieldReplacer.Factory

@ServiceProvider
public class SetFieldReplacerFactory
extends Object
implements FieldReplacer.Factory

This factory creates an implementation of FieldReplacer that provides an ability to set value of one record's field to value of another field of same type.

Specification

Specification of this field replacer should be in the following format: "set:<recordFilter>:<target>:<source>", where recordFilter is a RecordOnlyFilter, target is a name of target field and source name of a source field.

All records which are accepted by recordFilter and contain both target and source fields of the same type are processed by this replacer.

It is an error to have record which is accepted by recordFilter and has only one of specified fields or has both fields but of a different type.

Sample usage

The following code reads data from example.qds and set all quotes' bid prices to ask price (make them equal).

     DXEndpoint endpoint = ...
     endpoint.connect("example.qds[fieldReplacer=set:Quote*:bidPrice:askPrice]");
 

See Also:

FieldReplacer

Constructor Summary

Constructors

Constructor and Description
SetFieldReplacerFactory()

Method Summary

Modifier and Type	Method and Description
FieldReplacer	createFieldReplacer(String fieldReplacerSpec, DataScheme dataScheme) Creates field replacer for specified data scheme from specification.

Methods inherited from class java.lang.Object

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

Constructor Detail

SetFieldReplacerFactory

public SetFieldReplacerFactory()

Method Detail

createFieldReplacer

public FieldReplacer createFieldReplacer(String fieldReplacerSpec,
                                         DataScheme dataScheme)

Description copied from interface: FieldReplacer.Factory

Creates field replacer for specified data scheme from specification.

NOTE: the only one factory can support specification.

Specified by:

createFieldReplacer in interface FieldReplacer.Factory

Parameters:

fieldReplacerSpec - specification of FieldReplacer. The specification should start with "<factory_name>:" to detect should factory support the specification or not.

dataScheme - current data scheme

Returns:

new field replacer if this factory supports specification, null otherwise.