com.apple.foundationdb.record.query.plan.temp.view

Class SourceEntry

java.lang.Object

com.apple.foundationdb.record.query.plan.temp.view.SourceEntry

@API(value=EXPERIMENTAL)
public class SourceEntry
extends Object

A single entity produced by a source from a record, mapping each (inclusive) dependant source to a concrete value.

Given a record, the Source.evalSourceEntriesFor(com.apple.foundationdb.record.query.plan.temp.view.SourceEntry) method produces a stream of SourceEntrys. Each entry is much like a named tuple in the relational model; each source is mapped to an object containing a concrete value. In the case of multi-valued sources, one source entry is generated for each of those repeated values. A source entry from a particular source includes mappings from all dependent sources from which that source is derived. A SourceEntry object is immutable but supports the builder method addSourceValue(Source, Object) to generate a new source with one additional value.

Field Summary

Fields

Modifier and Type	Field and Description
static SourceEntry	EMPTY

Method Summary

Modifier and Type	Method and Description
SourceEntry	addSourceValue(Source source, Object object)
static SourceEntry	from(Source source, Object object)
Object	getValueFor(Source source)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

@Nonnull
public static final SourceEntry EMPTY

Method Detail

getValueFor

@Nonnull
public Object getValueFor(@Nonnull
                                   Source source)

addSourceValue

@Nonnull
public SourceEntry addSourceValue(@Nonnull
                                           Source source,
                                           @Nonnull
                                           Object object)

from

public static SourceEntry from(@Nonnull
                               Source source,
                               @Nonnull
                               Object object)