Field Detail

• IGNORE_TCCL_PROPERTY

  public static final String IGNORE_TCCL_PROPERTY

  System property to set to ignore the thread context ClassLoader.

  Since:

  2.1

  See Also:

  Constant Field Values

Method Detail

• getThreadContextClassLoader

  public static ClassLoader getThreadContextClassLoader()

  Gets the current Thread ClassLoader. Returns the system ClassLoader if the TCCL is null. If the system ClassLoader is null as well, then the ClassLoader for this class is returned. If running with a SecurityManager that does not allow access to the Thread ClassLoader or system ClassLoader, then the ClassLoader for this class is returned.

  Returns:

  the current ThreadContextClassLoader.

• loadClass

  public static Class<?> loadClass(String className)
                            throws ClassNotFoundException

  Loads a class by name. This method respects the IGNORE_TCCL_PROPERTY Log4j property. If this property is specified and set to anything besides false, then the default ClassLoader will be used.

  Parameters:

  className - The class name.

  Returns:

  the Class for the given name.

  Throws:

  ClassNotFoundException - if the specified class name could not be found

  Since:

  2.1

• newInstanceOf

  public static Object newInstanceOf(String className)
                              throws ClassNotFoundException,
                                     IllegalAccessException,
                                     InstantiationException,
                                     NoSuchMethodException,
                                     InvocationTargetException

  Loads and instantiates a Class using the default constructor.

  Parameters:

  className - The class name.

  Returns:

  new instance of the class.

  Throws:

  ClassNotFoundException - if the class isn't available to the usual ClassLoaders

  IllegalAccessException - if the class can't be instantiated through a public constructor

  InstantiationException - if there was an exception whilst instantiating the class

  NoSuchMethodException - if there isn't a no-args constructor on the class

  InvocationTargetException - if there was an exception whilst constructing the class

  Since:

  2.1

• newCheckedInstanceOf

  public static <T> T newCheckedInstanceOf(String className,
                                           Class<T> clazz)
                                    throws ClassNotFoundException,
                                           NoSuchMethodException,
                                           InvocationTargetException,
                                           InstantiationException,
                                           IllegalAccessException

  Loads and instantiates a derived class using its default constructor.

  Type Parameters:

  T - The type of the class to check.

  Parameters:

  className - The class name.

  clazz - The class to cast it to.

  Returns:

  new instance of the class cast to T

  Throws:

  ClassNotFoundException - if the class isn't available to the usual ClassLoaders

  IllegalAccessException - if the class can't be instantiated through a public constructor

  InstantiationException - if there was an exception whilst instantiating the class

  NoSuchMethodException - if there isn't a no-args constructor on the class

  InvocationTargetException - if there was an exception whilst constructing the class

  ClassCastException - if the constructed object isn't type compatible with T

  Since:

  2.1

• newCheckedInstanceOfProperty

  public static <T> T newCheckedInstanceOfProperty(String propertyName,
                                                   Class<T> clazz)
                                            throws ClassNotFoundException,
                                                   NoSuchMethodException,
                                                   InvocationTargetException,
                                                   InstantiationException,
                                                   IllegalAccessException

  Loads and instantiates a class given by a property name.

  Type Parameters:

  T - The type to cast it to.

  Parameters:

  propertyName - The property name to look up a class name for.

  clazz - The class to cast it to.

  Returns:

  new instance of the class given in the property or null if the property was unset.

  Throws:

  ClassNotFoundException - if the class isn't available to the usual ClassLoaders

  IllegalAccessException - if the class can't be instantiated through a public constructor

  InstantiationException - if there was an exception whilst instantiating the class

  NoSuchMethodException - if there isn't a no-args constructor on the class

  InvocationTargetException - if there was an exception whilst constructing the class

  ClassCastException - if the constructed object isn't type compatible with T

  Since:

  2.5

• findResources

  public static Collection<URL> findResources(String resource)

  Finds classpath resources.

  Parameters:

  resource - the name of the resource to find.

  Returns:

  a Collection of URLs matching the resource name. If no resources could be found, then this will be empty.

  Since:

  2.1