ProtectedFunctionMapper (Apache Tomcat 7.0.67 API Documentation)

java.lang.Object
- javax.el.FunctionMapper
- - org.apache.jasper.runtime.ProtectedFunctionMapper

All Implemented Interfaces:

FunctionMapper
```
public final class ProtectedFunctionMapper
extends FunctionMapper
implements FunctionMapper
```
Maps EL functions to their Java method counterparts. Keeps the actual Method objects protected so that JSP pages can't indirectly do reflection.

Author:

Mark Roth, Kin-man Chung

Method Summary

Methods
Modifier and Type	Method and Description
`static ProtectedFunctionMapper`	`getInstance()` Generated Servlet and Tag Handler implementations call this method to retrieve an instance of the ProtectedFunctionMapper.
`static ProtectedFunctionMapper`	`getMapForFunction(java.lang.String fnQName, java.lang.Class<?> c, java.lang.String methodName, java.lang.Class<?>[] args)` Creates an instance for this class, and stores the Method for the given EL function prefix and name.
`void`	`mapFunction(java.lang.String fnQName, java.lang.Class<?> c, java.lang.String methodName, java.lang.Class<?>[] args)` Stores a mapping from the given EL function prefix and name to the given Java method.
`java.lang.reflect.Method`	`resolveFunction(java.lang.String prefix, java.lang.String localName)` Resolves the specified local name and prefix into a Java.lang.Method.

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

- Method Detail
  - getInstance
```
public static ProtectedFunctionMapper getInstance()
```
    Generated Servlet and Tag Handler implementations call this method to retrieve an instance of the ProtectedFunctionMapper.
    
    Returns:
    A new protected function mapper.
  - mapFunction
```
public void mapFunction(java.lang.String fnQName,
               java.lang.Class<?> c,
               java.lang.String methodName,
               java.lang.Class<?>[] args)
```
    Stores a mapping from the given EL function prefix and name to the given Java method.
    
    Parameters:
    fnQName - The EL function qualified name (including prefix)
    c - The class containing the Java method
    methodName - The name of the Java method
    args - The arguments of the Java method
    
    Throws:
    
    java.lang.RuntimeException - if no method with the given signature could be found.
  - getMapForFunction
```
public static ProtectedFunctionMapper getMapForFunction(java.lang.String fnQName,
                                        java.lang.Class<?> c,
                                        java.lang.String methodName,
                                        java.lang.Class<?>[] args)
```
    Creates an instance for this class, and stores the Method for the given EL function prefix and name. This method is used for the case when there is only one function in the EL expression.
    
    Parameters:
    fnQName - The EL function qualified name (including prefix)
    c - The class containing the Java method
    methodName - The name of the Java method
    args - The arguments of the Java method
    
    Throws:
    
    java.lang.RuntimeException - if no method with the given signature could be found.
  - resolveFunction
```
public java.lang.reflect.Method resolveFunction(java.lang.String prefix,
                                       java.lang.String localName)
```
    Resolves the specified local name and prefix into a Java.lang.Method. Returns null if the prefix and local name are not found.
    
    Specified by:
    
    resolveFunction in interface FunctionMapper
    
    Specified by:
    
    resolveFunction in class FunctionMapper
    
    Parameters:
    prefix - the prefix of the function
    localName - the short name of the function
    
    Returns:
    the result of the method mapping. Null means no entry found.

Class ProtectedFunctionMapper

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getInstance

mapFunction

getMapForFunction

resolveFunction