Module jakarta.el
Package jakarta.el

Class FunctionMapper

java.lang.Object
jakarta.el.FunctionMapper

public abstract class FunctionMapper extends Object
The interface to a map between Jakarta Expression Language function names and methods.

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

Since:
Jakarta Server Pages 2.1
  • Constructor Details

    • FunctionMapper

      public FunctionMapper()
  • Method Details

    • 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.
    • mapFunction

      public void mapFunction(String prefix, String localName, Method meth)
      Adds a static method that can be used as a function.
      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()}.
      meth - The static method that is to be invoked, when the function is referenced. The null value causes the function to be removed from the map.
      Since:
      Jakarta Expression Language 3.0