com.pervasive.datarush.ports.record

Class RecordPortOptions

java.lang.Object

com.pervasive.datarush.ports.record.RecordPortOptions

All Implemented Interfaces:

LogicalPortOptions

public final class RecordPortOptions
extends Object
implements LogicalPortOptions

Provides a way for iterative operators to select a filtered view of one of their input ports. This can provide significant performance boost if only a subset of the iterator's staged columns are needed in each pass.

For example:

    //filtered contains a filtered view of the original port
    RecordPort filtered= input.filtered(subgraph, new RecordPortOptions(selectedFields))
 

Field Summary

Fields

Modifier and Type	Field and Description
static RecordPortOptions	DEFAULT By default, we don't provide any filtering

Constructor Summary

Constructors

Constructor and Description
RecordPortOptions(List<String> selectedFields) Select the specified set of fields

Method Summary

Methods

Modifier and Type	Method and Description
List<String>	getSelectedFields() Returns the selected fields.
boolean	isSpecified()

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT

public static final RecordPortOptions DEFAULT

By default, we don't provide any filtering

Constructor Detail

RecordPortOptions

public RecordPortOptions(List<String> selectedFields)

Select the specified set of fields

Parameters:

selectedFields - the fields to select. An empty list implies that all fields should be selected.

Method Detail

getSelectedFields

public List<String> getSelectedFields()

Returns the selected fields. An empty list implies that all fields should be selected.

Returns:

the selected fields.

isSpecified

public boolean isSpecified()