org.h2.schema

Class FunctionAlias.JavaMethod

java.lang.Object

org.h2.schema.FunctionAlias.JavaMethod

All Implemented Interfaces:

java.lang.Comparable<FunctionAlias.JavaMethod>

Enclosing class:

FunctionAlias

public static class FunctionAlias.JavaMethod
extends java.lang.Object
implements java.lang.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 and Description
int	compareTo(FunctionAlias.JavaMethod m)
java.lang.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, java.sql.ResultSet rs, int maxrows) Create a result for the given result set.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.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,
                                                java.sql.ResultSet rs,
                                                int maxrows)

Create a result for the given result set.

Parameters:

session - the session

rs - the result set

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

Returns:

the value

getColumnClasses

public java.lang.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 java.lang.Comparable<FunctionAlias.JavaMethod>