org.apache.metamodel.query

Class ToNumberFunction

java.lang.Object

org.apache.metamodel.query.DefaultScalarFunction

org.apache.metamodel.query.ToNumberFunction

All Implemented Interfaces:

Serializable, FunctionType, ScalarFunction

public class ToNumberFunction
extends DefaultScalarFunction

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.apache.metamodel.query.FunctionType

AVG, COUNT, FIRST, JAVA_SUBSTRING, LAST, MAP_VALUE, MAX, MIN, RANDOM, SUBSTRING, SUM, TO_BOOLEAN, TO_DATE, TO_NUMBER, TO_STRING

Constructor Summary

Constructors

Constructor and Description
ToNumberFunction()

Method Summary

Modifier and Type	Method and Description
Object	evaluate(Row row, Object[] parameters, SelectItem item) Applies and evaluates the function on a particular row of data.
ColumnType	getExpectedColumnType(ColumnType type)
String	getFunctionName()

Methods inherited from class org.apache.metamodel.query.DefaultScalarFunction

toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ToNumberFunction

public ToNumberFunction()

Method Detail

getExpectedColumnType

public ColumnType getExpectedColumnType(ColumnType type)

getFunctionName

public String getFunctionName()

evaluate

public Object evaluate(Row row,
                       Object[] parameters,
                       SelectItem item)

Description copied from interface: ScalarFunction

Applies and evaluates the function on a particular row of data.

Parameters:

row - the row containing data

parameters - any parameters associated with the function call

item - the select item which is the argument to this function. If a function takes multiple select items, this will be the primary one.

Returns: