Package org.forgerock.util

Class Loader

java.lang.Object
org.forgerock.util.Loader
public final class Loader extends Object
Provides methods for dynamically loading classes.

  • Method Details

    • getClassLoader

      public static ClassLoader getClassLoader()
      Returns the class loader that should be used consistently throughout the application.
      Returns:
      the class loader that should be used consistently throughout the application.

    • getClass

      public static Class<?> getClass(String name)
      Returns the Class object associated with the class or interface with the given name, or null if the class could not be returned for any reason.
      Parameters:
      name - the fully qualified name of the desired class.
      Returns:
      the Class object for the class with the specified name.

    • newInstance

      public static Object newInstance(String name)
      Creates a new instance of a named class. The class is instantiated as if by a new expression with an empty argument list. If the class cannot be instantiated for any reason, null is returned.
      Parameters:
      name - the fully qualified name of the class to instantiate.
      Returns:
      the newly instantiated object, or null if it could not be instantiated.

    • newInstance

      public static <T> T newInstance(String name, Class<T> type)
      Creates a new instance of a named class. The class is instantiated as if by a new expression with an empty argument list. If the class cannot be instantiated for any reason, null is returned.
      Type Parameters:
      T - class type
      Parameters:
      name - the fully qualified name of the class to instantiate.
      type - the class of the type of object to instantiate.
      Returns:
      the newly instantiated object, or null if it could not be instantiated.

    • loadMap

      public static <K, V extends Indexed<K>> Map<K,V> loadMap(Class<V> serviceType)
      Loads services of a particular type into a map. Such services implement the Indexed interface to provide a key to index the service by in the map.
      Type Parameters:
      K - key type
      V - service type
      Parameters:
      serviceType - the class type of services to load.
      Returns:
      a map containing the loaded services, indexed by the services' keys.

    • loadMap

      public static <K, V extends Indexed<K>> Map<K,V> loadMap(Class<V> serviceType, ClassLoader classLoader)
      Loads services of a particular type into a map. Such services implement the Indexed interface to provide a key to index the service by in the map.
      Type Parameters:
      K - key type
      V - service type
      Parameters:
      serviceType - the class type of services to load.
      classLoader - The classLoader to use.
      Returns:
      a map containing the loaded services, indexed by the services' keys.

    • loadList

      public static <E> List<E> loadList(Class<E> serviceType)
      Loads services of a particular type into a list.
      Type Parameters:
      E - service type
      Parameters:
      serviceType - the class type of services to load.
      Returns:
      a list containing the loaded services.

    • loadList

      public static <E> List<E> loadList(Class<E> serviceType, ClassLoader classLoader)
      Loads services of a particular type into a list.
      Type Parameters:
      E - service type
      Parameters:
      serviceType - the class type of services to load.
      classLoader - the classLoader to use.
      Returns:
      a list containing the loaded services.

    • getResource

      public static URL getResource(String name)
      Finds the resource with the given name.
      Parameters:
      name - the resource name.
      Returns:
      A URL object for reading the resource, or null if the resource could not be found.
      See Also: