org.hibernate.annotations.common.util
Class ReflectHelper

java.lang.Object
  org.hibernate.annotations.common.util.ReflectHelper

public final class ReflectHelper
extends Object

Complete duplication of org.hibernate.util.ReflectHelper.

Author:

Emmanuel Bernard

Field Summary

static Class[]	NO_PARAM_SIGNATURE
static Object[]	NO_PARAMS
static Class[]	SINGLE_OBJECT_PARAM_SIGNATURE

Method Summary

static Class	classForName(String name) Perform resolution of a class name.
static Class	classForName(String name, Class caller) Perform resolution of a class name.
static Method	extractEqualsMethod(Class clazz) Encapsulation of getting hold of a class's equals method.
static Method	extractHashCodeMethod(Class clazz) Encapsulation of getting hold of a class's hashCode method.
static Object	getConstantValue(String name) Resolve a constant to its actual value.
static Method	getMethod(Class clazz, Method method)
static boolean	isAbstractClass(Class clazz) Determine if the given class is declared abstract.
static boolean	isFinalClass(Class clazz) Determine is the given class is declared final.
static boolean	isPublic(Class clazz, Member member) Is this member publicly accessible.
static boolean	overridesEquals(Class clazz) Determine if the given class defines an Object.equals(java.lang.Object) override.
static boolean	overridesHashCode(Class clazz) Determine if the given class defines a Object.hashCode() override.

Methods inherited from class java.lang.Object

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

Field Detail

NO_PARAM_SIGNATURE

public static final Class[] NO_PARAM_SIGNATURE

NO_PARAMS

public static final Object[] NO_PARAMS

SINGLE_OBJECT_PARAM_SIGNATURE

public static final Class[] SINGLE_OBJECT_PARAM_SIGNATURE

Method Detail

extractEqualsMethod

public static Method extractEqualsMethod(Class clazz)
                                  throws NoSuchMethodException

Encapsulation of getting hold of a class's equals method.

Parameters:

clazz - The class from which to extract the equals method.

Returns:

The equals method reference

Throws:

NoSuchMethodException - Should indicate an attempt to extract equals method from interface.

extractHashCodeMethod

public static Method extractHashCodeMethod(Class clazz)
                                    throws NoSuchMethodException

Encapsulation of getting hold of a class's hashCode method.

Parameters:

clazz - The class from which to extract the hashCode method.

Returns:

The hashCode method reference

Throws:

NoSuchMethodException - Should indicate an attempt to extract hashCode method from interface.

overridesEquals

public static boolean overridesEquals(Class clazz)

Determine if the given class defines an Object.equals(java.lang.Object) override.

Parameters:

clazz - The class to check

Returns:

True if clazz defines an equals override.

overridesHashCode

public static boolean overridesHashCode(Class clazz)

Determine if the given class defines a Object.hashCode() override.

Parameters:

clazz - The class to check

Returns:

True if clazz defines an hashCode override.

classForName

public static Class classForName(String name,
                                 Class caller)
                          throws ClassNotFoundException

Perform resolution of a class name.

Here we first check the context classloader, if one, before delegating to Class.forName(String, boolean, ClassLoader) using the caller's classloader

Parameters:

name - The class name

caller - The class from which this call originated (in order to access that class's loader).

Returns:

The class reference.

Throws:

ClassNotFoundException - From Class.forName(String, boolean, ClassLoader).

classForName

public static Class classForName(String name)
                          throws ClassNotFoundException

Perform resolution of a class name.

Same as classForName(String, Class) except that here we delegate to Class.forName(String) if the context classloader lookup is unsuccessful.

Parameters:

name - The class name

Returns:

The class reference.

Throws:

ClassNotFoundException - From Class.forName(String).

isPublic

public static boolean isPublic(Class clazz,
                               Member member)

Is this member publicly accessible.

Parameters:

clazz - The class which defines the member

member - The memeber.

Returns:

True if the member is publicly accessible, false otherwise.

getConstantValue

public static Object getConstantValue(String name)

Resolve a constant to its actual value.

Parameters:

name - The name

Returns:

The value

isAbstractClass

public static boolean isAbstractClass(Class clazz)

Determine if the given class is declared abstract.

Parameters:

clazz - The class to check.

Returns:

True if the class is abstract, false otherwise.

isFinalClass

public static boolean isFinalClass(Class clazz)

Determine is the given class is declared final.

Parameters:

clazz - The class to check.

Returns:

True if the class is final, flase otherwise.

getMethod

public static Method getMethod(Class clazz,
                               Method method)