Package org.apache.velocity.util.introspection

Class ClassMap.MethodCache

java.lang.Object

org.apache.velocity.util.introspection.ClassMap.MethodCache

Enclosing class:

ClassMap

private static final class ClassMap.MethodCache
extends Object

This is the cache to store and look up the method information.

Version:

$Id$

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<Object,Object>	cache	Cache of Methods, or CACHE_MISS, keyed by method name and actual arguments used to find it.
private static final Object	CACHE_MISS
private static final Map<Class<?>,String>	convertPrimitives
private final org.slf4j.Logger	log	Class logger
private final MethodMap	methodMap	Map of methods that are searchable according to method parameters to find a match
private static final String	NULL_ARG

Constructor Summary

Constructors

Modifier	Constructor	Description
private	MethodCache(org.slf4j.Logger log, TypeConversionHandler conversionHandler)

Method Summary

Modifier and Type	Method	Description
Method	get(String name, Object[] params)	Find a Method using the method name and parameter objects.
private String	makeMethodKey(Method method)	Make a methodKey for the given method using the concatenation of the name and the types of the method parameters.
private String	makeMethodKey(String method, Object[] params)
private void	put(Method method)

Methods inherited from class java.lang.Object

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

Field Details

CACHE_MISS

private static final Object CACHE_MISS

NULL_ARG

private static final String NULL_ARG

convertPrimitives

private static final Map<Class<?>,String> convertPrimitives

log

private final org.slf4j.Logger log

Class logger

cache

private final Map<Object,Object> cache

Cache of Methods, or CACHE_MISS, keyed by method name and actual arguments used to find it.

methodMap

private final MethodMap methodMap

Map of methods that are searchable according to method parameters to find a match

Constructor Details

MethodCache

private MethodCache(org.slf4j.Logger log,
 TypeConversionHandler conversionHandler)

Method Details

get

public Method get(String name,
 Object[] params)
           throws MethodMap.AmbiguousException

Find a Method using the method name and parameter objects. Look in the methodMap for an entry. If found, it'll either be a CACHE_MISS, in which case we simply give up, or it'll be a Method, in which case, we return it. If nothing is found, then we must actually go and introspect the method from the MethodMap.

Parameters:

name - The method name to look up.

params - An array of parameters for the method.

Returns:

A Method object representing the method to invoke or null.

Throws:

MethodMap.AmbiguousException - When more than one method is a match for the parameters.

put

private void put(Method method)

makeMethodKey

private String makeMethodKey(Method method)

Make a methodKey for the given method using the concatenation of the name and the types of the method parameters.

Parameters:

method - to be stored as key

Returns:

key for ClassMap

makeMethodKey

private String makeMethodKey(String method,
 Object[] params)