Package com.yahoo.searchlib.expression

Class AggregationRefNode

java.lang.Object

com.yahoo.vespa.objects.Selectable

com.yahoo.vespa.objects.Identifiable

com.yahoo.searchlib.expression.ExpressionNode

com.yahoo.searchlib.expression.AggregationRefNode

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class AggregationRefNode
extends ExpressionNode

This node holds the index of an ExpressionNode in an external array, and is used as a proxy in the back-end to allow aggregators to be used in expressions.

Author:

baldersheim

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	classId

Constructor Summary

Constructors

Constructor	Description
AggregationRefNode()
AggregationRefNode(int index)
AggregationRefNode(AggregationResult result)

Method Summary

Modifier and Type	Method	Description
AggregationRefNode	clone()
boolean	equalsExpression(ExpressionNode obj)
AggregationResult	getExpression()
int	getIndex()
ResultNode	getResult()	Get the result of this expression.
int	hashCode()
protected void	onDeserialize(com.yahoo.vespa.objects.Deserializer buf)
boolean	onExecute()
protected int	onGetClassId()
void	onPrepare()
protected void	onSerialize(com.yahoo.vespa.objects.Serializer buf)
AggregationRefNode	setExpression(AggregationResult result)
AggregationRefNode	setIndex(int index)
void	visitMembers(com.yahoo.vespa.objects.ObjectVisitor visitor)

Methods inherited from class com.yahoo.searchlib.expression.ExpressionNode

equals, execute, executeIterative, onArgument, prepare

Methods inherited from class com.yahoo.vespa.objects.Identifiable

create, createFromId, deserialize, deserializeOptional, deserializeWithId, equals, getClassId, getUtf8, putUtf8, registerClass, serialize, serializeOptional, serializeWithId, toString

Methods inherited from class com.yahoo.vespa.objects.Selectable

select, select, selectMembers

Methods inherited from class java.lang.Object

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

Field Detail

classId

public static final int classId

Constructor Detail

AggregationRefNode

public AggregationRefNode()

AggregationRefNode

public AggregationRefNode(int index)

AggregationRefNode

public AggregationRefNode(AggregationResult result)

Method Detail

getExpression

public AggregationResult getExpression()

setExpression

public AggregationRefNode setExpression(AggregationResult result)

setIndex

public AggregationRefNode setIndex(int index)

getIndex

public int getIndex()

onExecute

public boolean onExecute()

Overrides:

onExecute in class ExpressionNode

onPrepare

public void onPrepare()

Overrides:

onPrepare in class ExpressionNode

onGetClassId

protected int onGetClassId()

Overrides:

onGetClassId in class ExpressionNode

onSerialize

protected void onSerialize(com.yahoo.vespa.objects.Serializer buf)

Overrides:

onSerialize in class ExpressionNode

onDeserialize

protected void onDeserialize(com.yahoo.vespa.objects.Deserializer buf)

Overrides:

onDeserialize in class ExpressionNode

clone

public AggregationRefNode clone()

Overrides:

clone in class ExpressionNode

visitMembers

public void visitMembers(com.yahoo.vespa.objects.ObjectVisitor visitor)

Overrides:

visitMembers in class ExpressionNode

getResult

public ResultNode getResult()

Description copied from class: ExpressionNode

Get the result of this expression.

Specified by:

getResult in class ExpressionNode

Returns:

the result as a ResultNode.

hashCode

public int hashCode()

Overrides:

hashCode in class com.yahoo.vespa.objects.Identifiable

equalsExpression

public boolean equalsExpression(ExpressionNode obj)

Specified by:

equalsExpression in class ExpressionNode