Package org.h2.schema

Class FunctionAlias.JavaMethod

java.lang.Object

org.h2.schema.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

Modifier and Type	Method	Description
int	compareTo(FunctionAlias.JavaMethod m)
Class<?>[]	getColumnClasses()
TypeInfo	getDataType()	Returns data type information for regular functions or null for table value functions.
int	getParameterCount()
ResultInterface	getTableValue(SessionLocal session, Expression[] args, boolean columnList)	Call the table user-defined function and return the value.
Value	getValue(SessionLocal 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()
static ResultInterface	resultSetToResult(SessionLocal session, ResultSet resultSet, int maxrows)	Create a result for the given result set.
String	toString()

Methods inherited from class java.lang.Object

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

Method Details

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(SessionLocal 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

getTableValue

public ResultInterface getTableValue(SessionLocal session,
 Expression[] args,
 boolean columnList)

Call the table 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

resultSetToResult

public static ResultInterface resultSetToResult(SessionLocal session,
 ResultSet resultSet,
 int maxrows)

Create a result for the given result set.

Parameters:

session - the session

resultSet - the result set

maxrows - the maximum number of rows to read (0 to just read the meta data)

Returns:

the value

getColumnClasses

public Class<?>[] getColumnClasses()

getDataType

public TypeInfo getDataType()

Returns data type information for regular functions or null for table value functions.

Returns:

data type information for regular functions or null for table value functions

getParameterCount

public int getParameterCount()

isVarArgs

public boolean isVarArgs()

compareTo

public int compareTo(FunctionAlias.JavaMethod m)

Specified by:

compareTo in interface Comparable<FunctionAlias.JavaMethod>