org.gcube.data.analysis.tabulardata.expression.composite.aggregation

Class Count

java.lang.Object

org.gcube.data.analysis.tabulardata.expression.Expression

org.gcube.data.analysis.tabulardata.expression.composite.CompositeExpression

org.gcube.data.analysis.tabulardata.expression.composite.UnaryExpression

org.gcube.data.analysis.tabulardata.expression.composite.aggregation.Count

All Implemented Interfaces:

Serializable, AggregationExpression

public class Count
extends UnaryExpression
implements AggregationExpression

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Count(Expression argument)

Method Summary

Methods

Modifier and Type	Method and Description
Operator	getOperator()
DataType	getReturnedDataType() Validates the returned data type of the Expression.

Methods inherited from class org.gcube.data.analysis.tabulardata.expression.composite.UnaryExpression

allowedDataTypes, equals, getArgument, hashCode, setArgument, toString, validate

Methods inherited from class org.gcube.data.analysis.tabulardata.expression.Expression

clone, getAppliableOperators

Methods inherited from class java.lang.Object

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

Constructor Detail

Count

public Count(Expression argument)

Method Detail

getOperator

public Operator getOperator()

Specified by:

getOperator in class CompositeExpression

getReturnedDataType

public DataType getReturnedDataType()
                             throws NotEvaluableDataTypeException

Description copied from class: Expression

Validates the returned data type of the Expression. Invalid expression may return a wrong datatype

Specified by:

getReturnedDataType in class Expression

Returns:

Throws:

NotEvaluableDataTypeException