Package org.apache.shiro.lang.util

Class ClassUtils

java.lang.Object
org.apache.shiro.lang.util.ClassUtils
public class ClassUtils extends Object
Utility method library used to conveniently interact with Classes, such as acquiring them from the application ClassLoaders and instantiating Objects from them.
Since:
0.1

  • Constructor Details

    • ClassUtils

      public ClassUtils()

  • Method Details

    • getResourceAsStream

      public static InputStream getResourceAsStream(String name)
      Returns the specified resource by checking the current thread's context class loader, then the current ClassLoader (ClassUtils.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:
      0.9

    • forName

      public static Class forName(String fqcn) throws UnknownClassException
      Attempts to load the specified class name from the current thread's context class loader, then the current ClassLoader (ClassUtils.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.
      Parameters:
      fqcn - the fully qualified class name to load
      Returns:
      the located class
      Throws:
      UnknownClassException - if the class cannot be found.

    • isAvailable

      public static boolean isAvailable(String fullyQualifiedClassName)

    • newInstance

      public static Object newInstance(String fqcn)

    • newInstance

      public static Object newInstance(String fqcn, Object... args)

    • newInstance

      public static Object newInstance(Class clazz)

    • newInstance

      public static Object newInstance(Class clazz, Object... args)

    • getConstructor

      public static Constructor getConstructor(Class clazz, Class... argTypes)

    • instantiate

      public static Object instantiate(Constructor ctor, Object... args)

    • getAnnotatedMethods

      public static List<Method> getAnnotatedMethods(Class<?> type, Class<? extends Annotation> annotation)
      Parameters:
      type -
      annotation -
      Returns:
      Since:
      1.3