Class Introspector
java.lang.Object
org.apache.velocity.util.introspection.IntrospectorBase
org.apache.velocity.util.introspection.Introspector
- Direct Known Subclasses:
SecureIntrospectorImpl
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:
- $Id$
- Author:
- Jason van Zyl, Bob McWhirter, Attila Szegedi, Paulo Gaspar, Henning P. Schmiedehausen
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Field Summary
Fields inherited from class org.apache.velocity.util.introspection.IntrospectorBase
log
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Constructor Summary
ConstructorDescriptionIntrospector
(org.slf4j.Logger log) Introspector
(org.slf4j.Logger log, TypeConversionHandler conversionHandler) -
Method Summary
Methods inherited from class org.apache.velocity.util.introspection.IntrospectorBase
getField, getIntrospectorCache
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Constructor Details
-
Introspector
public Introspector(org.slf4j.Logger log) - Parameters:
log
- A Logger object to use for the introspector.- Since:
- 1.5
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Introspector
- Parameters:
log
- A Logger object to use for the introspector.conversionHandler
- conversion handler- Since:
- 2.0
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Method Details
-
getMethod
Gets the method defined byname
andparams
for the Classc
.- Overrides:
getMethod
in classIntrospectorBase
- 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:
IllegalArgumentException
- When the parameters passed in can not be used for introspection.
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