com.yahoo.bullet.querying.tablefunctors

Class ExplodeFunctor

java.lang.Object

com.yahoo.bullet.querying.tablefunctors.TableFunctor

com.yahoo.bullet.querying.tablefunctors.OuterableTableFunctor

com.yahoo.bullet.querying.tablefunctors.ExplodeFunctor

All Implemented Interfaces:

Serializable

public class ExplodeFunctor
extends OuterableTableFunctor

A table functor that flattens the result of the given evaluator into a list of Bullet records. If only the key alias is specified, the result is assumed to be a list, and each element of the list is inserted into its own record as a field named by the key alias. If the value alias is also specified, the result is instead assumed to be a map, and each key-value pair of the map is inserted into its own record as two fields named respectively by the key and value aliases. If the result of the evaluator has the wrong type or is null, the table functor returns an empty list.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.yahoo.bullet.querying.tablefunctors.OuterableTableFunctor

outer

Constructor Summary

Constructors

Constructor and Description
ExplodeFunctor(Explode explode) Constructor that creates an explode table functor from a Explode.

Method Summary

Modifier and Type	Method and Description
protected List<com.yahoo.bullet.record.BulletRecord>	outerableApply(com.yahoo.bullet.record.BulletRecord record, com.yahoo.bullet.record.BulletRecordProvider provider) Applies this table functor to the given BulletRecord.

Methods inherited from class com.yahoo.bullet.querying.tablefunctors.OuterableTableFunctor

apply

Methods inherited from class java.lang.Object

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

Constructor Detail

ExplodeFunctor

public ExplodeFunctor(Explode explode)

Constructor that creates an explode table functor from a Explode.

Parameters:

explode - The explode table function to construct the table functor from.

Method Detail

outerableApply

protected List<com.yahoo.bullet.record.BulletRecord> outerableApply(com.yahoo.bullet.record.BulletRecord record,
                                                                    com.yahoo.bullet.record.BulletRecordProvider provider)

Description copied from class: OuterableTableFunctor

Applies this table functor to the given BulletRecord. This method is called by the main OuterableTableFunctor.apply(BulletRecord, BulletRecordProvider) method which will handle the outer option.

Specified by:

outerableApply in class OuterableTableFunctor

Parameters:

record - The Bullet record to apply this table functor to.

provider - The provider used in generating new Bullet records.

Returns:

The generated list of records from applying this table functor to the given Bullet record.