com.gigaspaces.query.sql.functions

Class SqlFunction

java.lang.Object

com.gigaspaces.query.sql.functions.SqlFunction

Direct Known Subclasses:

AbsSqlFunction, AppendSqlFunction, CeilSqlFunction, CharLengthSqlFunction, ConcatSqlFunction, FloorSqlFunction, InStrSqlFunction, LowerSqlFunction, ModSqlFunction, RoundSqlFunction, ToCharSqlFunction, ToNumberSqlFunction, UpperSqlFunction

public abstract class SqlFunction
extends Object

Defines a routine, to be use in SQLQuery context, that accepts arguments and performs an action on the stored object, such as a complex calculation.

Since:

11.0

Author:

Barak Bar Orion

Constructor Summary

Constructors

Constructor and Description
SqlFunction()

Method Summary

Modifier and Type	Method and Description
abstract Object	apply(SqlFunctionExecutionContext context) Defines the action to be performed on the stored object.
protected void	assertNumberOfArguments(int expected, SqlFunctionExecutionContext context) Validate the number of arguments a function receives.

Methods inherited from class java.lang.Object

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

Constructor Detail

SqlFunction

public SqlFunction()

Method Detail

apply

public abstract Object apply(SqlFunctionExecutionContext context)

Defines the action to be performed on the stored object.

Parameters:

context - contains the arguments, SqlFunctionExecutionContext

Returns:

The Stored object after applying the action

Throws:

RuntimeException - if wrong input arguments were supplied

assertNumberOfArguments

protected void assertNumberOfArguments(int expected,
                                       SqlFunctionExecutionContext context)

Validate the number of arguments a function receives.

Parameters:

expected - number of arguments, according to every function inner logic.

context - the actual received arguments, which are contained in the context.

Throws:

RuntimeException - if expected doesn't match actual number of arguments in context