net.lenni0451.reflect

Class Classes

java.lang.Object

net.lenni0451.reflect.Classes

public class Classes
extends java.lang.Object

This class contains some useful methods for working with classes.

Constructor Summary

Constructors

Constructor and Description
Classes()

Method Summary

Modifier and Type	Method and Description
static java.lang.Class<?>	byName(java.lang.String name) Get a class by its name.
static java.lang.Class<?>	byName(java.lang.String name, boolean initialize, java.lang.ClassLoader loader) Get a class by its name from a given class loader.
static java.lang.Class<?>	byName(java.lang.String name, java.lang.ClassLoader loader) Get a class by its name from a given class loader.
static void	ensureInitialized(java.lang.Class<?> clazz) Ensure that a class is initialized.
static java.lang.Class<?>	find(java.lang.String name, boolean initialize, java.lang.ClassLoader... loaders) Get a class by its name from the first class loader that can find it.
static java.lang.Class<?>	find(java.lang.String name, boolean initialize, java.lang.Iterable<java.lang.ClassLoader> loaders) Get a class by its name from the first class loader that can find it.
static java.lang.Class<?>	forName(java.lang.String name) Get a class by its name.
static java.lang.Class<?>	forName(java.lang.String name, boolean initialize, java.lang.ClassLoader loader) Get a class by its name from a given class loader.
static java.lang.Class<?>	forName(java.lang.String name, java.lang.ClassLoader loader) Get a class by its name from a given class loader.
static java.lang.Class<?>	getDeclaredClass(java.lang.Class<?> clazz, java.lang.String simpleName) Get a declared class of a class by its simple name.
static java.lang.Class<?>[]	getDeclaredClasses(java.lang.Class<?> clazz) Get all declared classes of a class.

Methods inherited from class java.lang.Object

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

Constructor Detail

Classes

public Classes()

Method Detail

getDeclaredClasses

public static java.lang.Class<?>[] getDeclaredClasses(java.lang.Class<?> clazz)

Get all declared classes of a class.
An empty array will be returned if the method could not be invoked.

Parameters:

clazz - The class to get the declared classes from

Returns:

An array of all declared classes of the class

Throws:

MethodNotFoundException - If the Class internal getDeclaredClasses0 method could not be found

getDeclaredClass

@Nullable
public static java.lang.Class<?> getDeclaredClass(java.lang.Class<?> clazz,
                                                             java.lang.String simpleName)

Get a declared class of a class by its simple name.

Parameters:

clazz - The class to get the declared class from

simpleName - The simple name of the class

Returns:

The class or null if it doesn't exist

ensureInitialized

public static void ensureInitialized(java.lang.Class<?> clazz)

Ensure that a class is initialized.
Thrown exceptions will be ignored.

Parameters:

clazz - The class to initialize

byName

@Nullable
public static java.lang.Class<?> byName(java.lang.String name)

Get a class by its name.
A wrapper for Class.forName(String) returning null instead of throwing an exception.

Parameters:

name - The name of the class

Returns:

The class or null if it doesn't exist

byName

@Nullable
public static java.lang.Class<?> byName(java.lang.String name,
                                                   java.lang.ClassLoader loader)

Get a class by its name from a given class loader.
The initialize parameter is set to true.

Parameters:

name - The name of the class

loader - The class loader to get the class from

Returns:

The class or null if it doesn't exist

byName

@Nullable
public static java.lang.Class<?> byName(java.lang.String name,
                                                   boolean initialize,
                                                   java.lang.ClassLoader loader)

Get a class by its name from a given class loader.
A wrapper for Class.forName(String, boolean, ClassLoader) returning null instead of throwing an exception.

Parameters:

name - The name of the class

initialize - Whether to initialize the class

loader - The class loader to get the class from

Returns:

The class or null if it doesn't exist

forName

@Nonnull
public static java.lang.Class<?> forName(java.lang.String name)

Get a class by its name.
A wrapper for Class.forName(String) sneaky throwing an exception.

Parameters:

name - The name of the class

Returns:

The class or null if it doesn't exist

Throws:

java.lang.ClassNotFoundException - If the class could not be found

forName

@Nonnull
public static java.lang.Class<?> forName(java.lang.String name,
                                                   java.lang.ClassLoader loader)

Get a class by its name from a given class loader.
The initialize parameter is set to true.

Parameters:

name - The name of the class

loader - The class loader to get the class from

Returns:

The class or null if it doesn't exist

Throws:

java.lang.ClassNotFoundException - If the class could not be found

forName

@Nonnull
public static java.lang.Class<?> forName(java.lang.String name,
                                                   boolean initialize,
                                                   java.lang.ClassLoader loader)

Get a class by its name from a given class loader.
A wrapper for Class.forName(String, boolean, ClassLoader) sneaky throwing an exception.

Parameters:

name - The name of the class

initialize - Whether to initialize the class

loader - The class loader to get the class from

Returns:

The class or null if it doesn't exist

Throws:

java.lang.ClassNotFoundException - If the class could not be found

find

public static java.lang.Class<?> find(java.lang.String name,
                                      boolean initialize,
                                      java.lang.Iterable<java.lang.ClassLoader> loaders)

Get a class by its name from the first class loader that can find it.

Parameters:

name - The name of the class

initialize - Whether to initialize the class

loaders - The class loaders to get the class from

Returns:

The class or null if it doesn't exist

Throws:

java.lang.ClassNotFoundException - If the class could not be found

find

public static java.lang.Class<?> find(java.lang.String name,
                                      boolean initialize,
                                      java.lang.ClassLoader... loaders)

Get a class by its name from the first class loader that can find it.

Parameters:

name - The name of the class

initialize - Whether to initialize the class

loaders - The class loaders to get the class from

Returns:

The class or null if it doesn't exist

Throws:

java.lang.ClassNotFoundException - If the class could not be found