io.jsonwebtoken.lang

Class Classes

java.lang.Object

io.jsonwebtoken.lang.Classes

public final class Classes
extends Object

Since:

0.1

Method Summary

Methods

Modifier and Type	Method and Description
static <T> Class<T>	forName(String fqcn) Attempts to load the specified class name from the current thread's context class loader, then the current ClassLoader (Classes.class.getClassLoader()), then the system/application ClassLoader (ClassLoader.getSystemClassLoader(), in that order.
static <T> Constructor<T>	getConstructor(Class<T> clazz, Class... argTypes)
static InputStream	getResourceAsStream(String name) Returns the specified resource by checking the current thread's context class loader, then the current ClassLoader (Classes.class.getClassLoader()), then the system/application ClassLoader (ClassLoader.getSystemClassLoader(), in that order, using getResourceAsStream(name).
static <T> T	instantiate(Constructor<T> ctor, Object... args)
static <T> T	invokeStatic(String fqcn, String methodName, Class[] argTypes, Object... args) Invokes the fully qualified class name's method named methodName with parameters of type argTypes using the args as the method arguments.
static boolean	isAvailable(String fullyQualifiedClassName)
static <T> T	newInstance(Class<T> clazz)
static <T> T	newInstance(Class<T> clazz, Object... args)
static <T> T	newInstance(String fqcn)
static <T> T	newInstance(String fqcn, Class[] ctorArgTypes, Object... args)
static <T> T	newInstance(String fqcn, Object... args)

Methods inherited from class java.lang.Object

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

Method Detail

forName

public static <T> Class<T> forName(String fqcn)
                        throws UnknownClassException

Attempts to load the specified class name from the current thread's context class loader, then the current ClassLoader (Classes.class.getClassLoader()), then the system/application ClassLoader (ClassLoader.getSystemClassLoader(), in that order. If any of them cannot locate the specified class, an UnknownClassException is thrown (our RuntimeException equivalent of the JRE's ClassNotFoundException.

Type Parameters:

T - The type of Class returned

Parameters:

fqcn - the fully qualified class name to load

Returns:

the located class

Throws:

UnknownClassException - if the class cannot be found.

getResourceAsStream

public static InputStream getResourceAsStream(String name)

Returns the specified resource by checking the current thread's context class loader, then the current ClassLoader (Classes.class.getClassLoader()), then the system/application ClassLoader (ClassLoader.getSystemClassLoader(), in that order, using getResourceAsStream(name).

Parameters:

name - the name of the resource to acquire from the classloader(s).

Returns:

the InputStream of the resource found, or null if the resource cannot be found from any of the three mentioned ClassLoaders.

Since:

0.8

isAvailable

public static boolean isAvailable(String fullyQualifiedClassName)

newInstance

public static <T> T newInstance(String fqcn)

newInstance

public static <T> T newInstance(String fqcn,
                Class[] ctorArgTypes,
                Object... args)

newInstance

public static <T> T newInstance(String fqcn,
                Object... args)

newInstance

public static <T> T newInstance(Class<T> clazz)

newInstance

public static <T> T newInstance(Class<T> clazz,
                Object... args)

getConstructor

public static <T> Constructor<T> getConstructor(Class<T> clazz,
                                Class... argTypes)

instantiate

public static <T> T instantiate(Constructor<T> ctor,
                Object... args)

invokeStatic

public static <T> T invokeStatic(String fqcn,
                 String methodName,
                 Class[] argTypes,
                 Object... args)

Invokes the fully qualified class name's method named methodName with parameters of type argTypes using the args as the method arguments.

Type Parameters:

T - the expected type of the object returned from the invoked method.

Parameters:

fqcn - fully qualified class name to locate

methodName - name of the method to invoke on the class

argTypes - the method argument types supported by the methodName method

args - the runtime arguments to use when invoking the located class method

Returns:

the result returned by the invoked method

Since:

0.10.0