Package com.yahoo.searchlib.expression

Class InterpolatedLookupNode

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.MultiArgFunctionNode

com.yahoo.searchlib.expression.UnaryFunctionNode

com.yahoo.searchlib.expression.InterpolatedLookupNode

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class InterpolatedLookupNode
extends UnaryFunctionNode

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

Author:

arnej27959

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	classId

Constructor Summary

Constructors

Constructor	Description
InterpolatedLookupNode()	Constructs an empty result node.
InterpolatedLookupNode(java.lang.String attribute, ExpressionNode arg)	Constructs an instance of this class with given attribute name and lookup argument.

Method Summary

Modifier and Type	Method	Description
protected boolean	equalsUnaryFunction(UnaryFunctionNode obj)
java.lang.String	getAttributeName()	Returns the name of the attribute whose value we do lookup in.
int	hashCode()
protected void	onDeserialize(com.yahoo.vespa.objects.Deserializer buf)
protected int	onGetClassId()
protected void	onSerialize(com.yahoo.vespa.objects.Serializer buf)
InterpolatedLookupNode	setAttributeName(java.lang.String attribute)	Sets the name of the attribute whose value we do lookup in.
void	visitMembers(com.yahoo.vespa.objects.ObjectVisitor visitor)

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

equalsMultiArgFunction, getArg, onPrepare, onPrepareResult

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

addArg, clone, equalsFunction, getArg, getNumArgs, onCalculate, onExecute, selectMembers

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

equalsExpression, getResult, setResult

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

Methods inherited from class java.lang.Object

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

Field Detail

classId

public static final int classId

Constructor Detail

InterpolatedLookupNode

public InterpolatedLookupNode()

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

InterpolatedLookupNode

public InterpolatedLookupNode(java.lang.String attribute,
                              ExpressionNode arg)

Constructs an instance of this class with given attribute name and lookup argument.

Parameters:

attribute - The attribute to retrieve.

arg - Expression evaluating to the lookup argument.

Method Detail

getAttributeName

public java.lang.String getAttributeName()

Returns the name of the attribute whose value we do lookup in.

Returns:

The attribute name.

setAttributeName

public InterpolatedLookupNode setAttributeName(java.lang.String attribute)

Sets the name of the attribute whose value we do lookup in.

Parameters:

attribute - The attribute to retrieve.

Returns:

This, to allow chaining.

onGetClassId

protected int onGetClassId()

Overrides:

onGetClassId in class UnaryFunctionNode

onSerialize

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

Overrides:

onSerialize in class MultiArgFunctionNode

onDeserialize

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

Overrides:

onDeserialize in class MultiArgFunctionNode

hashCode

public int hashCode()

Overrides:

hashCode in class MultiArgFunctionNode

equalsUnaryFunction

protected boolean equalsUnaryFunction(UnaryFunctionNode obj)

Specified by:

equalsUnaryFunction in class UnaryFunctionNode

visitMembers

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

Overrides:

visitMembers in class MultiArgFunctionNode