Package com.yahoo.searchlib.expression

Class ResultNode

java.lang.Object

com.yahoo.vespa.objects.Selectable

com.yahoo.vespa.objects.Identifiable

com.yahoo.searchlib.expression.ResultNode

All Implemented Interfaces:

Cloneable, Comparable<ResultNode>

Direct Known Subclasses:

BoolResultNode, BucketResultNode, NullResultNode, PositiveInfinityResultNode, ResultNodeVector, SingleResultNode

public abstract class ResultNode
extends com.yahoo.vespa.objects.Identifiable
implements Comparable<ResultNode>

This abstract expression node represents the result value of execution.

Author:

baldersheim, Simon Thoresen Hult

Field Summary

Fields

Modifier and Type	Field	Description
static int	classId

Constructor Summary

Constructors

Constructor	Description
ResultNode()

Method Summary

Modifier and Type	Method	Description
int	compareTo(ResultNode b)
boolean	equals(Object obj)
abstract double	getFloat()	Returns the float representation of this result.
abstract long	getInteger()	Returns the integer representation of this result.
abstract byte[]	getRaw()	Returns the raw byte array representation of this result.
abstract String	getString()	Returns the string representation of this result.
void	negate()	Negate the value contained within the result node.
protected abstract int	onCmp(ResultNode rhs)	This method must be implemented by all subclasses of this to allow ordering of results.
protected int	onGetClassId()
protected abstract void	set(ResultNode rhs)	This method must be implemented by all subclasses of this to allow new results to be calculated.

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

clone, create, createFromId, deserialize, deserializeOptional, deserializeWithId, equals, getClassId, getRawUtf8Bytes, getUtf8, hashCode, onDeserialize, onSerialize, putUtf8, registerClass, serialize, serializeOptional, serializeWithId, toString, visitMembers

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

ResultNode

public ResultNode()

Method Detail

onGetClassId

protected int onGetClassId()

Overrides:

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

compareTo

public final int compareTo(ResultNode b)

Specified by:

compareTo in interface Comparable<ResultNode>

equals

public boolean equals(Object obj)

Overrides:

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

set

protected abstract void set(ResultNode rhs)

This method must be implemented by all subclasses of this to allow new results to be calculated.

Parameters:

rhs - The node to get the result from.

onCmp

protected abstract int onCmp(ResultNode rhs)

This method must be implemented by all subclasses of this to allow ordering of results. This method is used by the Cloneable implementation.

Parameters:

rhs - The other node to compare with.

Returns:

Comparable result.

getInteger

public abstract long getInteger()

Returns the integer representation of this result.

Returns:

The value of this.

getFloat

public abstract double getFloat()

Returns the float representation of this result.

Returns:

The value of this.

getString

public abstract String getString()

Returns the string representation of this result.

Returns:

The value of this.

getRaw

public abstract byte[] getRaw()

Returns the raw byte array representation of this result.

Returns:

The value of this.

negate

public void negate()

Negate the value contained within the result node.