Package org.apache.druid.segment

Class AggregateProjectionMetadata

java.lang.Object

org.apache.druid.segment.AggregateProjectionMetadata

public class AggregateProjectionMetadata
extends Object

Aggregate projection schema and row count information to store in Metadata which itself is stored inside a segment, defining which projections exist for the segment.

Decorated with JsonTypeInfo annotations as a future-proofing mechanism in the event we add other types of projections and need to extract out a base interface from this class.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AggregateProjectionMetadata.Schema
static class	AggregateProjectionMetadata.SchemaBuilder

Field Summary

Fields

Modifier and Type	Field	Description
static final Comparator<AggregateProjectionMetadata>	COMPARATOR

Constructor Summary

Constructors

Constructor	Description
AggregateProjectionMetadata(AggregateProjectionMetadata.Schema schema, int numRows)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
int	getNumRows()
AggregateProjectionMetadata.Schema	getSchema()
int	hashCode()
static AggregateProjectionMetadata.SchemaBuilder	schemaBuilder(String name)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

COMPARATOR

public static final Comparator<AggregateProjectionMetadata> COMPARATOR

Constructor Details

AggregateProjectionMetadata

public AggregateProjectionMetadata(AggregateProjectionMetadata.Schema schema,
 int numRows)

Method Details

schemaBuilder

public static AggregateProjectionMetadata.SchemaBuilder schemaBuilder(String name)

getSchema

public AggregateProjectionMetadata.Schema getSchema()

getNumRows

public int getNumRows()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object