org.apache.velocity.util.introspection

Class Introspector

public class Introspector extends IntrospectorBase

This basic function of this class is to return a Method object for a particular class given the name of a method and the parameters to the method in the form of an Object[] The first time the Introspector sees a class it creates a class method map for the class in question. Basically the class method map is a Hastable where Method objects are keyed by a concatenation of the method name and the names of classes that make up the parameters. For example, a method with the following signature: public void method(String a, StringBuffer b) would be mapped by the key: "method" + "java.lang.String" + "java.lang.StringBuffer" This mapping is performed for all the methods in a class and stored for

Version: $Id: Introspector.java,v 1.21.4.1 2004/03/03 23:23:08 geirm Exp $

Author: Jason van Zyl Bob McWhirter Attila Szegedi Paulo Gaspar

Field Summary
static StringCACHEDUMP_MSG
define a public string so that it can be looked for if interested
RuntimeLoggerrlog
our engine runtime services
Constructor Summary
Introspector(RuntimeLogger logger)
Recieves our RuntimeServices object
Method Summary
protected voidclearCache()
Clears the classmap and classname caches, and logs that we did so
MethodgetMethod(Class c, String name, Object[] params)
Gets the method defined by name and params for the Class c.

Field Detail

CACHEDUMP_MSG

public static final String CACHEDUMP_MSG
define a public string so that it can be looked for if interested

rlog

private RuntimeLogger rlog
our engine runtime services

Constructor Detail

Introspector

public Introspector(RuntimeLogger logger)
Recieves our RuntimeServices object

Method Detail

clearCache

protected void clearCache()
Clears the classmap and classname caches, and logs that we did so

getMethod

public Method getMethod(Class c, String name, Object[] params)
Gets the method defined by name and params for the Class c.

Parameters: c Class in which the method search is taking place name Name of the method being searched for params An array of Objects (not Classes) that describe the the parameters

Returns: The desired Method object.

Copyright B) 2002 Apache Software Foundation. All Rights Reserved.