org.h2.schema

类 FunctionAlias.JavaMethod

java.lang.Object

org.h2.schema.FunctionAlias.JavaMethod

所有已实现的接口:

Comparable<FunctionAlias.JavaMethod>

封闭类:

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.

方法概要

限定符和类型	方法和说明
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()

从类继承的方法 java.lang.Object

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

方法详细资料

toString

public String toString()

覆盖:

toString 在类中 Object

hasConnectionParam

public boolean hasConnectionParam()

Check if this function requires a database connection.

返回:

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.

参数:

session - the session

args - the argument list

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

返回:

the value

getTableValue

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

Call the table user-defined function and return the value.

参数:

session - the session

args - the argument list

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

返回:

the value

resultSetToResult

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

Create a result for the given result set.

参数:

session - the session

resultSet - the result set

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

返回:

the value

getColumnClasses

public Class<?>[] getColumnClasses()

getDataType

public TypeInfo getDataType()

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

返回:

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)

指定者:

compareTo 在接口中 Comparable<FunctionAlias.JavaMethod>