FunctionMapper (Java EE 5)

Java EE API

previous page next page

Overview

Package

Class

Tree

Deprecated

Index

Help

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: NESTED | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

javax.el Class FunctionMapper

java.lang.Object
  javax.el.FunctionMapper

public abstract class FunctionMapper
extends Object

在 EL 函数名称和方法之间映射的接口。

FunctionMapper 将 ${prefix:name()} 样式函数映射到可以执行该函数的静态方法。

since

JSP 2.1

英文文档：

The interface to a map between EL function names and methods.

A FunctionMapper maps ${prefix:name()} style functions to a static method that can execute that function.

Since:: JSP 2.1

Constructor Summary
`FunctionMapper()`

Method Summary
`abstract Method`	`resolveFunction(String prefix, String localName)` Resolves the specified prefix and local name into a `java.lang.Method`.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

public FunctionMapper()

英文文档：
FunctionMapper

public FunctionMapper()

Method Detail

abstract public Method resolveFunction(String prefix, String localName)
将指定的前缀和本地名称解析为 `java.lang.Method`。
如果找不到与给定前缀和本地名称匹配的函数，则返回 `null`。

prefix 函数前缀；如果没有前缀，则为 ""。例如，`${fn:method()}` 中的 `"fn"` 或 `${method()}` 中的 `""`。

localName 函数的短名称。例如，`${fn:method()}` 中的 `"method"`。

return 要调用的静态方法；如果找不到匹配的方法，则返回 `null`。

英文文档：
resolveFunction

public abstract Method resolveFunction(String prefix,
                                       String localName)

Resolves the specified prefix and local name into a java.lang.Method.

Returns null if no function could be found that matches the given prefix and local name.

Parameters:: prefix - the prefix of the function, or "" if no prefix. For example, "fn" in ${fn:method()}, or "" in ${method()}.; localName - the short name of the function. For example, "method" in ${fn:method()}.
Returns:: the static method to invoke, or null if no match was found.