public final class Introspector extends 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 the aggregation of the method name and the array of parameters classes. This mapping is performed for all the public methods of a class and stored.
| Constructor and Description |
|---|
Introspector(org.apache.commons.logging.Log log,
ClassLoader cloader)
Create the introspector.
|
Introspector(org.apache.commons.logging.Log log,
ClassLoader cloader,
Permissions perms)
Create the introspector.
|
| Modifier and Type | Method and Description |
|---|---|
Class<?> |
getClassByName(String className)
Gets a class by name through this introspector class loader.
|
Constructor<?> |
getConstructor(Class<?> c,
MethodKey key)
Gets the constructor defined by the
MethodKey. |
Constructor<?> |
getConstructor(MethodKey key)
Gets the constructor defined by the
MethodKey. |
Field |
getField(Class<?> c,
String key)
Gets the field named by
key for the class c. |
String[] |
getFieldNames(Class<?> c)
Gets the array of accessible field names known for a given class.
|
ClassLoader |
getLoader()
Gets the class loader used by this introspector.
|
Method |
getMethod(Class<?> c,
MethodKey key)
Gets the method defined by the
MethodKey for the class c. |
Method |
getMethod(Class<?> c,
String name,
Object[] params)
Gets a method defined by a class, a name and a set of parameters.
|
String[] |
getMethodNames(Class<?> c)
Gets the array of accessible methods names known for a given class.
|
Method[] |
getMethods(Class<?> c,
String methodName)
Gets the array of accessible method known for a given class.
|
void |
setLoader(ClassLoader cloader)
Sets the class loader used to solve constructors.
|
public Introspector(org.apache.commons.logging.Log log,
ClassLoader cloader)
log - the logger to usecloader - the class loaderpublic Introspector(org.apache.commons.logging.Log log,
ClassLoader cloader,
Permissions perms)
log - the logger to usecloader - the class loaderperms - the permissionspublic Class<?> getClassByName(String className)
className - the class namepublic Method getMethod(Class<?> c, String name, Object[] params)
c - the classname - the method nameparams - the method parametersMethodKey.AmbiguousException - if no unambiguous method could be found through introspectionpublic Method getMethod(Class<?> c, MethodKey key)
MethodKey for the class c.c - Class in which the method search is taking placekey - Key of the method being searched forMethodKey.AmbiguousException - if no unambiguous method could be found through introspectionpublic Field getField(Class<?> c, String key)
key for the class c.c - Class in which the field search is taking placekey - Name of the field being searched forpublic String[] getFieldNames(Class<?> c)
c - the classpublic String[] getMethodNames(Class<?> c)
c - the classpublic Method[] getMethods(Class<?> c, String methodName)
c - the classmethodName - the method namepublic Constructor<?> getConstructor(MethodKey key)
MethodKey.key - Key of the constructor being searched forpublic Constructor<?> getConstructor(Class<?> c, MethodKey key)
MethodKey.c - the class we want to instantiatekey - Key of the constructor being searched forpublic void setLoader(ClassLoader cloader)
Also cleans the constructors and methods caches.
cloader - the class loader; if null, use this instance class loaderpublic ClassLoader getLoader()
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