com.northconcepts.datapipeline.transform.lookup

Class RecordListLookup

java.lang.Object

com.northconcepts.datapipeline.transform.lookup.Lookup

com.northconcepts.datapipeline.transform.lookup.RecordListLookup

public class RecordListLookup
extends Lookup

An in-memory lookup implementation that performs joins using a RecordList. Records are indexed by parameter fields for fast lookup during join operations. Supports optional filtering of result fields returned from the lookup.

See Also:

Lookup, RecordList

Constructor Summary

Constructors

Constructor and Description
RecordListLookup(RecordList recordList, FieldList parameterFields) Creates a RecordListLookup that returns all fields from matching records.
RecordListLookup(RecordList recordList, FieldList parameterFields, FieldList resultFields) Creates a RecordListLookup that returns selected fields from matching records.

Method Summary

Modifier and Type	Method and Description
RecordList	get(Object... keys) Retrieves records matching the specified lookup keys.
String	toString()

Methods inherited from class com.northconcepts.datapipeline.transform.lookup.Lookup

close, get, open

Methods inherited from class java.lang.Object

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

Constructor Detail

RecordListLookup

public RecordListLookup(RecordList recordList,
                        FieldList parameterFields)

Creates a RecordListLookup that returns all fields from matching records.

Parameters:

recordList - the list of records to use for lookups

parameterFields - the fields to use as lookup keys

RecordListLookup

public RecordListLookup(RecordList recordList,
                        FieldList parameterFields,
                        FieldList resultFields)

Creates a RecordListLookup that returns selected fields from matching records.

Parameters:

recordList - the list of records to use for lookups

parameterFields - the fields to use as lookup keys

resultFields - the fields to return in lookup results, or null to return all fields

Method Detail

get

public RecordList get(Object... keys)

Retrieves records matching the specified lookup keys.

Specified by:

get in class Lookup

Parameters:

keys - the values to match against the parameter fields

Returns:

a RecordList containing all matching records, or null if no matches found

toString

public String toString()

Overrides:

toString in class Object