org.apache.tajo.plan.expr

Class UnaryEval

java.lang.Object

org.apache.tajo.plan.expr.EvalNode

org.apache.tajo.plan.expr.UnaryEval

All Implemented Interfaces:

Cloneable, ProtoObject<PlanProto.EvalNodeTree>, GsonObject

Direct Known Subclasses:

CastEval, IsNullEval, NotEval, SignedEval

public abstract class UnaryEval
extends EvalNode
implements Cloneable

Field Summary

Fields

Modifier and Type	Field and Description
protected EvalNode	child

Fields inherited from class org.apache.tajo.plan.expr.EvalNode

type

Constructor Summary

Constructors

Constructor and Description
UnaryEval(EvalType type)
UnaryEval(EvalType type, EvalNode child)

Method Summary

Methods

Modifier and Type	Method and Description
int	childNum()
Object	clone()
boolean	equals(Object obj)
<T extends Datum> T	eval(Schema schema, Tuple tuple)
EvalNode	getChild()
EvalNode	getChild(int idx)
String	getName()
TajoDataTypes.DataType	getValueType()
int	hashCode()
void	postOrder(EvalNodeVisitor visitor)
void	preOrder(EvalNodeVisitor visitor)
void	setChild(EvalNode child)

Methods inherited from class org.apache.tajo.plan.expr.EvalNode

getProto, getType, toJson

Methods inherited from class java.lang.Object

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

Field Detail

child

protected EvalNode child

Constructor Detail

UnaryEval

public UnaryEval(EvalType type)

UnaryEval

public UnaryEval(EvalType type,
         EvalNode child)

Method Detail

childNum

public int childNum()

Specified by:

childNum in class EvalNode

getChild

public EvalNode getChild(int idx)

Specified by:

getChild in class EvalNode

setChild

public void setChild(EvalNode child)

getChild

public EvalNode getChild()

getValueType

public TajoDataTypes.DataType getValueType()

Specified by:

getValueType in class EvalNode

getName

public String getName()

Specified by:

getName in class EvalNode

eval

public <T extends Datum> T eval(Schema schema,
                       Tuple tuple)

Specified by:

eval in class EvalNode

preOrder

public void preOrder(EvalNodeVisitor visitor)

Specified by:

preOrder in class EvalNode

postOrder

public void postOrder(EvalNodeVisitor visitor)

Specified by:

postOrder in class EvalNode

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

clone

public Object clone()
             throws CloneNotSupportedException

Overrides:

clone in class EvalNode

Throws:

CloneNotSupportedException