Class MethodMap
- java.lang.Object
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- org.apache.velocity.util.introspection.MethodMap
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public class MethodMap extends java.lang.Object
- Version:
- $Id: MethodMap.java 935975 2010-04-20 16:04:55Z nbubna $
- Author:
- Jason van Zyl, Bob McWhirter, Christoph Reck, Geir Magnusson Jr., Attila Szegedi
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
MethodMap.AmbiguousException
Simple distinguishable exception, used when we run across ambiguous overloading.
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Constructor Summary
Constructors Constructor Description MethodMap()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
add(java.lang.reflect.Method method)
Add a method to a list of methods by name.java.lang.reflect.Method
find(java.lang.String methodName, java.lang.Object[] args)
Find a method.java.util.List
get(java.lang.String key)
Return a list of methods with the same name.
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Method Detail
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add
public void add(java.lang.reflect.Method method)
Add a method to a list of methods by name. For a particular class we are keeping track of all the methods with the same name.- Parameters:
method
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get
public java.util.List get(java.lang.String key)
Return a list of methods with the same name.- Parameters:
key
-- Returns:
- List list of methods
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find
public java.lang.reflect.Method find(java.lang.String methodName, java.lang.Object[] args) throws MethodMap.AmbiguousException
Find a method. Attempts to find the most specific applicable method using the algorithm described in the JLS section 15.12.2 (with the exception that it can't distinguish a primitive type argument from an object type argument, since in reflection primitive type arguments are represented by their object counterparts, so for an argument of type (say) java.lang.Integer, it will not be able to decide between a method that takes int and a method that takes java.lang.Integer as a parameter.
This turns out to be a relatively rare case where this is needed - however, functionality like this is needed.
- Parameters:
methodName
- name of methodargs
- the actual arguments with which the method is called- Returns:
- the most specific applicable method, or null if no method is applicable.
- Throws:
MethodMap.AmbiguousException
- if there is more than one maximally specific applicable method
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