org.apache.catalina.util

Class Introspection

java.lang.Object

org.apache.catalina.util.Introspection

public class Introspection
extends Object

Provides introspection utilities that either require knowledge of Tomcat internals or are solely used by Tomcat internals.

Constructor Summary

Constructors

Constructor and Description
Introspection()

Method Summary

Modifier and Type	Method and Description
static Class<?>	convertPrimitiveType(Class<?> clazz) Converts the primitive type to its corresponding wrapper.
static Field[]	getDeclaredFields(Class<?> clazz) Obtain the declared fields for a class taking account of any security manager that may be configured.
static Method[]	getDeclaredMethods(Class<?> clazz) Obtain the declared methods for a class taking account of any security manager that may be configured.
static String	getPropertyName(Method setter) Extract the Java Bean property name from the setter name.
static boolean	isValidLifecycleCallback(Method method) Determines if a method is a valid lifecycle callback method.
static boolean	isValidSetter(Method method) Determines if a method has a valid name and signature for a Java Bean setter.
static Class<?>	loadClass(Context context, String className) Attempt to load a class using the given Container's class loader.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Introspection

public Introspection()

Method Detail

getPropertyName

public static String getPropertyName(Method setter)

Extract the Java Bean property name from the setter name. Note: This method assumes that the method name has already been checked for correctness.

Parameters:

setter - The setter method

Returns:

the bean property name

isValidSetter

public static boolean isValidSetter(Method method)

Determines if a method has a valid name and signature for a Java Bean setter.

Parameters:

method - The method to test

Returns:

true if the method does have a valid name and signature, else false

isValidLifecycleCallback

public static boolean isValidLifecycleCallback(Method method)

Determines if a method is a valid lifecycle callback method.

Parameters:

method - The method to test

Returns:

true if the method is a valid lifecycle callback method, else false

getDeclaredFields

public static Field[] getDeclaredFields(Class<?> clazz)

Obtain the declared fields for a class taking account of any security manager that may be configured.

Parameters:

clazz - The class to introspect

Returns:

the class fields as an array

getDeclaredMethods

public static Method[] getDeclaredMethods(Class<?> clazz)

Obtain the declared methods for a class taking account of any security manager that may be configured.

Parameters:

clazz - The class to introspect

Returns:

the class methods as an array

loadClass

public static Class<?> loadClass(Context context,
                                 String className)

Attempt to load a class using the given Container's class loader. If the class cannot be loaded, a debug level log message will be written to the Container's log and null will be returned.

Parameters:

context - The class loader of this context will be used to attemmpt to load the class

className - The class name

Returns:

the loaded class or null if loading failed

convertPrimitiveType

public static Class<?> convertPrimitiveType(Class<?> clazz)

Converts the primitive type to its corresponding wrapper.

Parameters:

clazz - Class that will be evaluated

Returns:

if the parameter is a primitive type returns its wrapper; otherwise returns the same class