Class ReflectionUtil

java.lang.Object

org.apache.el.util.ReflectionUtil

public class ReflectionUtil
extends Object

Utilities for Managing Serialization and Reflection.

Field Summary

Fields

Modifier and Type	Field	Description
protected static final String[]	PRIMITIVE_NAMES	Names of Java primitive types.
protected static final Class<?>[]	PRIMITIVES	Class objects for Java primitive types, in the same order as PRIMITIVE_NAMES.

Method Summary

Modifier and Type	Method	Description
static Class<?>	forName(String name)	Loads a class by name, supporting primitive types and array notation.
protected static Class<?>	forNamePrimitive(String name)	Looks up a primitive class by name.
static Method	getMethod(EvaluationContext ctx, Object base, Object property, Class<?>[] paramTypes, Object[] paramValues)	Returns a method based on the criteria.
static Class<?>[]	toTypeArray(String[] s)	Converts an array of Class names to Class types.
static String[]	toTypeNameArray(Class<?>[] c)	Converts an array of Class types to Class names.

Methods inherited from class Object

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

Field Details

PRIMITIVE_NAMES

protected static final String[] PRIMITIVE_NAMES

Names of Java primitive types.

PRIMITIVES

protected static final Class<?>[] PRIMITIVES

Class objects for Java primitive types, in the same order as PRIMITIVE_NAMES.

Method Details

forName

public static Class<?> forName(String name)
                        throws ClassNotFoundException

Loads a class by name, supporting primitive types and array notation.

Parameters:

name - the class name to load

Returns:

the Class object, or null if the name is empty

Throws:

ClassNotFoundException - if the class cannot be found

forNamePrimitive

protected static Class<?> forNamePrimitive(String name)

Looks up a primitive class by name.

Parameters:

name - the primitive type name

Returns:

the corresponding Class object, or null if not a primitive

toTypeArray

public static Class<?>[] toTypeArray(String[] s)
                              throws ClassNotFoundException

Converts an array of Class names to Class types.

Parameters:

s - The array of class names

Returns:

An array of Class instance where the element at index i in the result is an instance of the class with the name at index i in the input

Throws:

ClassNotFoundException - If a class of a given name cannot be found

toTypeNameArray

public static String[] toTypeNameArray(Class<?>[] c)

Converts an array of Class types to Class names.

Parameters:

c - The array of class instances

Returns:

An array of Class names where the element at index i in the result is the name of the class instance at index i in the input

getMethod

public static Method getMethod(EvaluationContext ctx,
 Object base,
 Object property,
 Class<?>[] paramTypes,
 Object[] paramValues)
                        throws MethodNotFoundException

Returns a method based on the criteria.

Parameters:

ctx - the context in which the expression is being evaluated

base - the object that owns the method

property - the name of the method

paramTypes - the parameter types to use

paramValues - the parameter values

Returns:

the method specified

Throws:

MethodNotFoundException - If a method cannot be found that matches the given criteria