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java.lang.Objectorg.apache.commons.jexl.util.introspection.ClassMap
public class ClassMap
Taken from the Velocity tree so we can be self-sufficient
A cache of introspection information for a specific class instance. Keys
java.lang.Method
objects by a concatenation of the method name and
the names of classes that make up the parameters.
Nested Class Summary | |
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private static class |
ClassMap.CacheMiss
represents a miss on the cached data. |
private static class |
ClassMap.MethodInfo
Used for the iterative discovery process for public methods. |
Field Summary | |
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private static ClassMap.CacheMiss |
CACHE_MISS
constant for a miss on the cached data. |
private java.lang.Class |
clazz
Class passed into the constructor used to as the basis for the Method map. |
private java.util.Map |
methodCache
Cache of Methods, or CACHE_MISS, keyed by method name and actual arguments used to find it. |
private MethodMap |
methodMap
map from method name and args to a Method . |
private static java.lang.Object |
OBJECT
represents null or missing arguments. |
Constructor Summary | |
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ClassMap(java.lang.Class aClass)
Standard constructor. |
Method Summary | |
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java.lang.reflect.Method |
findMethod(java.lang.String name,
java.lang.Object[] params)
Find a Method using the methodKey provided. |
private static java.lang.reflect.Method[] |
getAccessibleMethods(java.lang.Class clazz)
Retrieves public methods for a class. |
private static int |
getAccessibleMethods(java.lang.Class clazz,
ClassMap.MethodInfo[] methodInfos,
int upcastCount)
Recursively finds a match for each method, starting with the class, and then searching the superclass and interfaces. |
(package private) java.lang.Class |
getCachedClass()
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private static java.lang.reflect.Method |
getPublicMethod(java.lang.Class clazz,
java.lang.String name,
java.lang.Class[] paramTypes)
Looks up the method with specified name and signature in the first public superclass or implemented interface of the class. |
static java.lang.reflect.Method |
getPublicMethod(java.lang.reflect.Method method)
For a given method, retrieves its publicly accessible counterpart. |
private java.lang.String |
makeMethodKey(java.lang.reflect.Method method)
Make a methodKey for the given method using the concatenation of the name and the types of the method parameters. |
private static java.lang.String |
makeMethodKey(java.lang.String method,
java.lang.Object[] params)
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private void |
populateMethodCache()
Populate the Map of direct hits. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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private static final ClassMap.CacheMiss CACHE_MISS
private static final java.lang.Object OBJECT
private java.lang.Class clazz
private final java.util.Map methodCache
private final MethodMap methodMap
Method
.
Constructor Detail |
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public ClassMap(java.lang.Class aClass)
aClass
- the class to deconstruct.Method Detail |
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java.lang.Class getCachedClass()
public java.lang.reflect.Method findMethod(java.lang.String name, java.lang.Object[] params) throws MethodMap.AmbiguousException
name
- method nameparams
- method parameters
Method
MethodMap.AmbiguousException
- if the method and parameters are ambiguous.private void populateMethodCache()
private java.lang.String makeMethodKey(java.lang.reflect.Method method)
private static java.lang.String makeMethodKey(java.lang.String method, java.lang.Object[] params)
private static java.lang.reflect.Method[] getAccessibleMethods(java.lang.Class clazz)
private static int getAccessibleMethods(java.lang.Class clazz, ClassMap.MethodInfo[] methodInfos, int upcastCount)
clazz
- Class to checkmethodInfos
- array of methods we are searching to matchupcastCount
- current number of methods we have matched
public static java.lang.reflect.Method getPublicMethod(java.lang.reflect.Method method)
method
- a method whose publicly callable counterpart is requested.
private static java.lang.reflect.Method getPublicMethod(java.lang.Class clazz, java.lang.String name, java.lang.Class[] paramTypes)
class
- the class whose method is soughtname
- the name of the methodparamTypes
- the classes of method parameters
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