| java.lang.Object
 org.apache.commons.jexl.util.introspection.IntrospectorBase
All known Subclasses: org.apache.commons.jexl.util.introspection.Introspector,
| IntrospectorBase | | public class IntrospectorBase (Code) | | 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
since:
1.0
author:
Jason van Zyl
author:
Bob McWhirter
author:
Attila Szegedi
author:
Paulo Gaspar
version:
$Id: IntrospectorBase.java 398464 2006-04-30 23:50:43Z dion $ |
| Field Summary | |
| protected Set | cachedClassNames
Holds the qualified class names for the classes we hold in the
classMethodMaps hash. | | protected Map | classMethodMaps
Holds the method maps for the classes we know about, keyed by Class
object. |
| Method Summary | |
| protected void | clearCache()
Clears the classmap and classname caches. | | protected ClassMap | createClassMap(Class c)
Creates a class map for specific class and registers it in the cache.
Also adds the qualified name to the name->class map for later Classloader
change detection.
Parameters:
c - class. | | public Method | getMethod(Class c, String name, Object[] params)
Gets the method defined by name and params
for the Class c. |
| cachedClassNames | | protected Set cachedClassNames(Code) | | Holds the qualified class names for the classes we hold in the
classMethodMaps hash.
|
| classMethodMaps | | protected Map classMethodMaps(Code) | | Holds the method maps for the classes we know about, keyed by Class
object.
|
| clearCache | | protected void clearCache()(Code) | | Clears the classmap and classname caches.
|
| createClassMap | | protected ClassMap createClassMap(Class c)(Code) | | Creates a class map for specific class and registers it in the cache.
Also adds the qualified name to the name->class map for later Classloader
change detection.
Parameters:
c - class. a ClassMap |
| getMethod | | public Method getMethod(Class c, String name, Object[] params) throws Exception(Code) | | Gets the method defined by name and params
for the Class c.
Parameters:
c - Class in which the method search is taking place
Parameters:
name - Name of the method being searched for
Parameters:
params - An array of Objects (not Classes) that describe the theparameters The desired Method object.
throws:
Exception - on any logical error. |
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