org.apache.commons.jexl.util.introspection
Class IntrospectorBase
java.lang.Object
|
+--org.apache.commons.jexl.util.introspection.IntrospectorBase
- Direct Known Subclasses:
- Introspector
- public class IntrospectorBase
- extends Object
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: IntrospectorBase.java,v 1.3 2004/02/28 13:45:21 yoavs Exp $
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. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
classMethodMaps
protected Map classMethodMaps
- Holds the method maps for the classes we know about, keyed by
Class object.
cachedClassNames
protected Set cachedClassNames
- Holds the qualified class names for the classes
we hold in the classMethodMaps hash
IntrospectorBase
public IntrospectorBase()
getMethod
public Method getMethod(Class c,
String name,
Object[] params)
throws Exception
- Gets the method defined by
name
and
params
for the Class c
.
- Parameters:
c
- Class in which the method search is taking placename
- Name of the method being searched forparams
- An array of Objects (not Classes) that describe the
the parameters- Returns:
- The desired Method object.
createClassMap
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.
clearCache
protected void clearCache()
- Clears the classmap and classname
caches
Copyright © 2003-2004 The Apache Software Foundation. All Rights Reserved.