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, ExpressionCategory

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
List<Class<? extends DataType>>	allowedDataTypes()
Operator	getOperator()
DataType	getReturnedDataType() Validates the returned data type of the Expression.

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

equals, getArgument, getLeavesByType, hashCode, setArgument, toString, validate

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

clone, getAppliableOperators, getExpressionsByCategory

Methods inherited from class java.lang.Object

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

Constructor Detail

Count

public Count(Expression argument)

Method Detail

allowedDataTypes

public List<Class<? extends DataType>> allowedDataTypes()

Overrides:

allowedDataTypes in class UnaryExpression

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