org.h2.engine

Class FunctionAlias.JavaMethod

java.lang.Object

org.h2.engine.FunctionAlias.JavaMethod

All Implemented Interfaces:

Comparable<FunctionAlias.JavaMethod>

Enclosing class:

FunctionAlias

public static class FunctionAlias.JavaMethod
extends Object
implements Comparable<FunctionAlias.JavaMethod>

There may be multiple Java methods that match a function name. Each method must have a different number of parameters however. This helper class represents one such method.

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(FunctionAlias.JavaMethod m)
Class<?>[]	getColumnClasses()
int	getDataType()
int	getParameterCount()
Value	getValue(Session session, Expression[] args, boolean columnList) Call the user-defined function and return the value.
boolean	hasConnectionParam() Check if this function requires a database connection.
boolean	isVarArgs()
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

toString

public String toString()

Overrides:

toString in class Object

hasConnectionParam

public boolean hasConnectionParam()

Check if this function requires a database connection.

Returns:

if the function requires a connection

getValue

public Value getValue(Session session,
             Expression[] args,
             boolean columnList)

Call the user-defined function and return the value.

Parameters:

session - the session

args - the argument list

columnList - true if the function should only return the column list

Returns:

the value

getColumnClasses

public Class<?>[] getColumnClasses()

getDataType

public int getDataType()

getParameterCount

public int getParameterCount()

isVarArgs

public boolean isVarArgs()

compareTo

public int compareTo(FunctionAlias.JavaMethod m)

Specified by:

compareTo in interface Comparable<FunctionAlias.JavaMethod>