org.apache.iceberg.expressions

Class BoundAggregate<T,C>

java.lang.Object

org.apache.iceberg.expressions.Aggregate<BoundTerm<T>>

org.apache.iceberg.expressions.BoundAggregate<T,C>

All Implemented Interfaces:

java.io.Serializable, Bound<C>, Expression

Direct Known Subclasses:

CountAggregate, MaxAggregate, MinAggregate

public class BoundAggregate<T,C>
extends Aggregate<BoundTerm<T>>
implements Bound<C>

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.iceberg.expressions.Expression

Expression.Operation

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BoundAggregate(Expression.Operation op, BoundTerm<T> term)

Method Summary

Modifier and Type	Method and Description
java.lang.String	columnName()
java.lang.String	describe()
C	eval(StructLike struct) Produce a value from the struct for this expression.
BoundReference<?>	ref() Returns the underlying reference.
Type	type()

Methods inherited from class org.apache.iceberg.expressions.Aggregate

op, term, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.iceberg.expressions.Expression

isEquivalentTo, negate

Constructor Detail

BoundAggregate

protected BoundAggregate(Expression.Operation op,
                         BoundTerm<T> term)

Method Detail

eval

public C eval(StructLike struct)

Description copied from interface: Bound

Produce a value from the struct for this expression.

Specified by:

eval in interface Bound<C>

Parameters:

struct - a struct of incoming data

Returns:

the value of this expression when evaluated on the incoming struct

ref

public BoundReference<?> ref()

Description copied from interface: Bound

Returns the underlying reference.

Specified by:

ref in interface Bound<C>

type

public Type type()

columnName

public java.lang.String columnName()

describe

public java.lang.String describe()