org.apache.velocity.util.introspection
Class MethodMap

java.lang.Object
  |
  +--org.apache.velocity.util.introspection.MethodMap

public class MethodMap

extends java.lang.Object

Version:

$Id: MethodMap.java,v 1.13.2.3 2002/07/25 01:35:04 geirm Exp $

Author:

Jason van Zyl, Bob McWhirter, Christoph Reck, Geir Magnusson Jr.

Inner Class Summary

class	MethodMap.AmbiguousException simple distinguishable exception, used when we run across ambiguous overloading
private class	MethodMap.Twonk little class to hold 'distance' information for calling params, as well as determine specificity

Field Summary

(package private) java.util.Map	methodByNameMap Keep track of all methods with the same name.
protected static java.lang.Object	OBJECT

Constructor Summary

MethodMap()

Method Summary

void	add(java.lang.reflect.Method method) Add a method to a list of methods by name.
private MethodMap.Twonk	calcDistance(java.lang.Object[] set, java.lang.Class[] base) Calculates the distance, expressed as a vector of inheritance steps, between the calling args and the method args.
private boolean	checkPrimitive(java.lang.Class formal, java.lang.Class arg) check for primitive and widening.
java.lang.reflect.Method	find(java.lang.String methodName, java.lang.Object[] params) Find a method.
java.util.List	get(java.lang.String key) Return a list of methods with the same name.

Methods inherited from class java.lang.Object

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

Field Detail

OBJECT

protected static final java.lang.Object OBJECT

methodByNameMap

java.util.Map methodByNameMap

Keep track of all methods with the same name.

Constructor Detail

MethodMap

public MethodMap()

Method Detail

add

public void add(java.lang.reflect.Method method)

Add a method to a list of methods by name. For a particular class we are keeping track of all the methods with the same name.

get

public java.util.List get(java.lang.String key)

Return a list of methods with the same name.

Parameters:

String - key

Returns:

List list of methods

find

public java.lang.reflect.Method find(java.lang.String methodName,
                                     java.lang.Object[] params)
                              throws MethodMap.AmbiguousException

Find a method. Attempts to find the most appropriate method using the sense of 'specificity'.

This turns out to be a relatively rare case where this is needed - however, functionality like this is needed. This may not be the optimum approach, but it works.

Parameters:

String - name of method

Object[] - params

Returns:

Method

calcDistance

private MethodMap.Twonk calcDistance(java.lang.Object[] set,
                                     java.lang.Class[] base)

Calculates the distance, expressed as a vector of inheritance steps, between the calling args and the method args. There still is an issue re interfaces...

checkPrimitive

private boolean checkPrimitive(java.lang.Class formal,
                               java.lang.Class arg)

check for primitive and widening. Take from the 1.4 code