Package com.yahoo.searchlib.expression

Class AttributeNode

java.lang.Object

com.yahoo.vespa.objects.Selectable

com.yahoo.vespa.objects.Identifiable

com.yahoo.searchlib.expression.ExpressionNode

com.yahoo.searchlib.expression.FunctionNode

com.yahoo.searchlib.expression.AttributeNode

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

AttributeMapLookupNode

public class AttributeNode
extends FunctionNode

This function is an instruction to retrieve the value of a named attribute.

Author:

baldersheim, Simon Thoresen Hult

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final int	classId

Constructor Summary

Constructors

Constructor	Description
AttributeNode()	Constructs an empty result node.
AttributeNode(String attribute)	Constructs an instance of this class with given attribute name.

Method Summary

Modifier and Type	Method	Description
protected boolean	equalsFunction(FunctionNode obj)
String	getAttributeName()	Returns the name of the attribute whose value this function is to retrieve.
int	hashCode()
protected void	onDeserialize(com.yahoo.vespa.objects.Deserializer buf)
protected int	onGetClassId()
protected void	onSerialize(com.yahoo.vespa.objects.Serializer buf)
AttributeNode	setAttributeName(String attribute)	Sets the name of the attribute whose value this function is to retrieve.
void	visitMembers(com.yahoo.vespa.objects.ObjectVisitor visitor)

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

clone, equalsExpression, getResult, setResult

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

equals, execute, executeIterative, onArgument, onExecute, onPrepare, prepare

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

create, createFromId, deserialize, deserializeOptional, deserializeWithId, equals, getClassId, getRawUtf8Bytes, 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 Details

classId

public static final int classId

Constructor Details

AttributeNode

public AttributeNode()

Constructs an empty result node. NOTE: This instance is broken until non-optional member data is set.

AttributeNode

public AttributeNode(String attribute)

Constructs an instance of this class with given attribute name.

Parameters:

attribute - The attribute to retrieve.

Method Details

getAttributeName

public String getAttributeName()

Returns the name of the attribute whose value this function is to retrieve.

Returns:

The attribute name.

setAttributeName

public AttributeNode setAttributeName(String attribute)

Sets the name of the attribute whose value this function is to retrieve.

Parameters:

attribute - The attribute to retrieve.

Returns:

This, to allow chaining.

onGetClassId

protected int onGetClassId()

Overrides:

onGetClassId in class FunctionNode

onSerialize

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

Overrides:

onSerialize in class FunctionNode

onDeserialize

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

Overrides:

onDeserialize in class FunctionNode

hashCode

public int hashCode()

Overrides:

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

equalsFunction

protected boolean equalsFunction(FunctionNode obj)

Specified by:

equalsFunction in class FunctionNode

visitMembers

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

Overrides:

visitMembers in class FunctionNode