org.apache.metamodel.query

Class ToStringFunction

java.lang.Object

org.apache.metamodel.query.DefaultScalarFunction

org.apache.metamodel.query.ToStringFunction

All Implemented Interfaces:

FunctionType, ScalarFunction

public class ToStringFunction
extends DefaultScalarFunction

Field Summary

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

AVG, COUNT, MAX, MIN, SUM, TO_BOOLEAN, TO_DATE, TO_NUMBER, TO_STRING

Constructor Summary

Constructors

Constructor and Description
ToStringFunction()

Method Summary

Methods

Modifier and Type	Method and Description
Object	evaluate(Row row, 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

ToStringFunction

public ToStringFunction()

Method Detail

getExpectedColumnType

public ColumnType getExpectedColumnType(ColumnType type)

getFunctionName

public String getFunctionName()

evaluate

public Object evaluate(Row row,
              SelectItem item)

Description copied from interface: ScalarFunction

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

Parameters:

row - the row containing data

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: