org.apache.commons.jexl.util.introspection
Class Introspector
java.lang.Object
|
+--org.apache.commons.jexl.util.introspection.IntrospectorBase
|
+--org.apache.commons.jexl.util.introspection.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 Hashtable 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
- Version:
- $Id: Introspector.java 398171 2006-04-29 14:57:29Z dion $
Field Summary |
static String |
CACHEDUMP_MSG
define a public string so that it can be looked for
if interested. |
Constructor Summary |
Introspector(Log logger)
Recieves our RuntimeServices object. |
Method Summary |
protected void |
clearCache()
Clears the classmap and classname
caches, and logs that we did so. |
Method |
getMethod(Class c,
String name,
Object[] params)
Gets the method defined by name and
params for the Class c . |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
CACHEDUMP_MSG
public static final String CACHEDUMP_MSG
- define a public string so that it can be looked for
if interested.
- See Also:
- Constant Field Values
Introspector
public Introspector(Log logger)
- Recieves our RuntimeServices object.
- Parameters:
logger
- a Log
.
getMethod
public Method getMethod(Class c,
String name,
Object[] params)
throws Exception
- Gets the method defined by
name
and
params
for the Class c
.
- Overrides:
getMethod
in class IntrospectorBase
- 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.
- Throws:
Exception
- if the superclass does.
clearCache
protected void clearCache()
- Clears the classmap and classname
caches, and logs that we did so.
- Overrides:
clearCache
in class IntrospectorBase
Copyright © 2003-2006 The Apache Software Foundation. All Rights Reserved.