Package com.yahoo.searchlib.expression

Class MultiArgFunctionNode

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

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

CatFunctionNode, MathFunctionNode, NumericFunctionNode, StrCatFunctionNode, UnaryFunctionNode

public abstract class MultiArgFunctionNode
extends FunctionNode

This is an abstract super-class for all functions that accepts multiple arguments. This node implements the necessary API for manipulating arguments.

Author:

baldersheim, Simon Thoresen Hult

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	classId

Constructor Summary

Constructors

Constructor	Description
MultiArgFunctionNode()

Method Summary

Modifier and Type	Method	Description
MultiArgFunctionNode	addArg(ExpressionNode arg)	Adds the given argument to this function.
MultiArgFunctionNode	clone()
protected boolean	equalsFunction(FunctionNode obj)
protected abstract boolean	equalsMultiArgFunction(MultiArgFunctionNode obj)
ExpressionNode	getArg(int i)	Returns the argument at the given index.
int	getNumArgs()	Returns the number of arguments this function has.
int	hashCode()
protected boolean	onCalculate(java.util.List<ExpressionNode> args, ResultNode result)
protected void	onDeserialize(com.yahoo.vespa.objects.Deserializer buf)
protected boolean	onExecute()
protected int	onGetClassId()
protected void	onPrepare()
protected void	onPrepareResult()
protected void	onSerialize(com.yahoo.vespa.objects.Serializer buf)
void	selectMembers(com.yahoo.vespa.objects.ObjectPredicate predicate, com.yahoo.vespa.objects.ObjectOperation operation)
void	visitMembers(com.yahoo.vespa.objects.ObjectVisitor visitor)

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

MultiArgFunctionNode

public MultiArgFunctionNode()

Method Detail

addArg

public MultiArgFunctionNode addArg(ExpressionNode arg)

Adds the given argument to this function.

Parameters:

arg - The argument to add.

Returns:

This, to allow chaining.

getArg

public ExpressionNode getArg(int i)

Returns the argument at the given index.

Parameters:

i - The index of the argument to return.

Returns:

The argument.

getNumArgs

public int getNumArgs()

Returns the number of arguments this function has.

Returns:

The size of the argument list.

onExecute

protected boolean onExecute()

Overrides:

onExecute in class ExpressionNode

onPrepare

protected void onPrepare()

Overrides:

onPrepare in class ExpressionNode

onCalculate

protected boolean onCalculate(java.util.List<ExpressionNode> args,
                              ResultNode result)

onPrepareResult

protected void onPrepareResult()

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 final boolean equalsFunction(FunctionNode obj)

Specified by:

equalsFunction in class FunctionNode

equalsMultiArgFunction

protected abstract boolean equalsMultiArgFunction(MultiArgFunctionNode obj)

clone

public MultiArgFunctionNode clone()

Overrides:

clone in class FunctionNode

visitMembers

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

Overrides:

visitMembers in class FunctionNode

selectMembers

public void selectMembers(com.yahoo.vespa.objects.ObjectPredicate predicate,
                          com.yahoo.vespa.objects.ObjectOperation operation)

Overrides:

selectMembers in class com.yahoo.vespa.objects.Selectable