Package org.datanucleus.store.rdbms.sql.method

Class SimpleNumericMethod

java.lang.Object

org.datanucleus.store.rdbms.sql.method.SimpleNumericMethod

All Implemented Interfaces:

SQLMethod

Direct Known Subclasses:

AbsFunction, AcosFunction, AsinFunction, AtanFunction, CeilFunction, CosFunction, CoshFunction, CotFunction, DegreesFunction, ExpFunction, FloorFunction, LogFunction, LogFunction2, PowerFunction, RadiansFunction, SignFunction, SinFunction, SinhFunction, SQLCubeFunction, SQLRollupFunction, SqrtFunction, TanFunction, TanhFunction

public abstract class SimpleNumericMethod
extends Object
implements SQLMethod

Expression handler to invoke an SQL numeric function that takes in argument(s).

• If the expression is null will return a NumericExpression

  {functionName}({args})

  and expr isn't used

Constructor Summary

Constructors

Constructor	Description
SimpleNumericMethod()

Method Summary

Modifier and Type	Method	Description
protected abstract Class	getClassForMapping()
SQLExpression	getExpression(SQLStatement stmt, SQLExpression expr, List<SQLExpression> args)	Return the expression for this SQL function.
protected abstract String	getFunctionName()

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleNumericMethod

public SimpleNumericMethod()

Method Detail

getFunctionName

protected abstract String getFunctionName()

getExpression

public SQLExpression getExpression(SQLStatement stmt,
                                   SQLExpression expr,
                                   List<SQLExpression> args)

Description copied from interface: SQLMethod

Return the expression for this SQL function.

Specified by:

getExpression in interface SQLMethod

Parameters:

stmt - SQLStatement that this expression is for

expr - The expression that it is invoked on

args - Arguments passed in

Returns:

The SQL expression using the SQL function

getClassForMapping

protected abstract Class getClassForMapping()