Module dk.cloudcreate.essentials.shared

Package dk.cloudcreate.essentials.shared.reflection

Class Classes

java.lang.Object

dk.cloudcreate.essentials.shared.reflection.Classes

public final class Classes
extends Object

Utility class for working with Class's

Constructor Summary

Constructors

Constructor	Description
Classes()

Method Summary

Modifier and Type	Method	Description
static int	compareTypeSpecificity(Class<?> leftSide, Class<?> rightSide)	Compares leftSide with the rightSide for inheritance order. It returns: negative integer - if the leftSide is less specific then the rightSide Example: If leftSide is a CharSequence and rightSide is a String (a specialization of CharSequence). zero - if the leftSide is equally specific to rightSide (i.e.
static boolean	doesClassExistOnClasspath(String fullyQualifiedClassName)	Check if a class with the specified Fully Qualified Class Name (FQCN) exists on the classpath
static boolean	doesClassExistOnClasspath(String fullyQualifiedClassName, ClassLoader classLoader)	Check if a class with the specified Fully Qualified Class Name (FQCN) exists on the classpath
static Class<?>	forName(String fullyQualifiedClassName)	Load a class based on a fully qualified class name (FQCN)
static Class<?>	forName(String fullyQualifiedClassName, ClassLoader classLoader)	Load a class based on a fully qualified class name (FQCN) and using a specific ClassLoader
static List<Class<?>>	superClasses(Class<?> type)	Get all superclasses of a type.

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

forName

public static Class<?> forName(String fullyQualifiedClassName)
                        throws ReflectionException

Load a class based on a fully qualified class name (FQCN)

Parameters:

fullyQualifiedClassName - the Fully Qualified Class Name (FQCN) as a

Returns:

The class loaded

Throws:

ReflectionException - in case loading the class failed

forName

public static Class<?> forName(String fullyQualifiedClassName,
                               ClassLoader classLoader)
                        throws ReflectionException

Load a class based on a fully qualified class name (FQCN) and using a specific ClassLoader

Parameters:

fullyQualifiedClassName - the Fully Qualified Class Name (FQCN) as a string

classLoader - the class loader to use

Returns:

The class loaded

Throws:

ReflectionException - in case loading the class failed

compareTypeSpecificity

public static int compareTypeSpecificity(Class<?> leftSide,
                                         Class<?> rightSide)

Compares leftSide with the rightSide for inheritance order.
It returns:

• negative integer - if the leftSide is less specific then the rightSide
  Example: If leftSide is a CharSequence and rightSide is a String (a specialization of CharSequence).
• zero - if the leftSide is equally specific to rightSide (i.e. leftSide and rightSide are the same class)
  Example: If leftSide is a CharSequence and rightSide is a CharSequence
• negative integer - if the leftSide is more specific then the rightSide
  Example: If leftSide is a String (a subclass of CharSequence) and rightSide is a CharSequence.

Parameters:

leftSide - the left side type

rightSide - the right side type

Returns:

the inheritance comparison between the leftSide and rightSide

Throws:

IllegalArgumentException - in case leftSide and rightSide aren't either the same class or in a inheritance hierarchy with each other

superClasses

public static List<Class<?>> superClasses(Class<?> type)

Get all superclasses of a type.

Parameters:

type - The type to get all super classes for

Returns:

All superclasses of type

doesClassExistOnClasspath

public static boolean doesClassExistOnClasspath(String fullyQualifiedClassName)

Check if a class with the specified Fully Qualified Class Name (FQCN) exists on the classpath

Parameters:

fullyQualifiedClassName - the fully qualified name of the class

Returns:

true if a class with the given Fully Qualified Class Name (FQCN) exists on the classpath, otherwise false

doesClassExistOnClasspath

public static boolean doesClassExistOnClasspath(String fullyQualifiedClassName,
                                                ClassLoader classLoader)

Check if a class with the specified Fully Qualified Class Name (FQCN) exists on the classpath

Parameters:

fullyQualifiedClassName - the fully qualified name of the class

classLoader - the classloader used to check if the class exist

Returns:

true if a class with the given Fully Qualified Class Name (FQCN) exists on the classpath, otherwise false