Class ClassUtils

Method Details

• getInstance

  public ClassUtils getInstance()

• getThreadContextLoader

  private static final ClassLoader getThreadContextLoader()

• getClassLoader

  private static final ClassLoader getClassLoader()

• getCallerLoader

  private static final ClassLoader getCallerLoader(Object caller)

• getClass

  public static Class getClass(String name) throws ClassNotFoundException

  Load a class with a given name.

  It will try to load the class in the following order:

  • From Thread.currentThread().getContextClassLoader()
  • Using the basic Class.forName(java.lang.String)
  • From ClassUtils.class.getClassLoader()

  Parameters:

  name - Fully qualified class name to be loaded

  Returns:

  Class object

  Throws:

  ClassNotFoundException - if the class cannot be found

• getInstance

  public static Object getInstance(String classname) throws ClassNotFoundException, IllegalAccessException, InstantiationException

  Throws:

  ClassNotFoundException

  IllegalAccessException

  InstantiationException

• getResources

  public static List<URL> getResources(String name, Object caller)

  Load all resources with the specified name. If none are found, we prepend the name with '/' and try again. This will attempt to load the resources from the following methods (in order):

  • Thread.currentThread().getContextClassLoader().getResources(name)
  • ClassUtils.class.getClassLoader().getResources(name)
  • ClassUtils.class.getResource(name)
  • getCallerLoader(Object caller).getResources(name)
  • caller.getClass().getResource(name)

  Parameters:

  name - The name of the resources to load

  caller - The instance or Class calling this method

• addResource

  private static final void addResource(String name, Set<String> urls, Class c)

• addResources

  private static final boolean addResources(String name, Set<String> urls, ClassLoader loader)

• getResource

  public static URL getResource(String name, Object caller)

  Load a given resource.

  This method will try to load the resource using the following methods (in order):

  • Thread.currentThread().getContextClassLoader().getResource(name)
  • ClassUtils.class.getClassLoader().getResource(name)
  • ClassUtils.class.getResource(name)
  • caller.getClass().getResource(name) or, if caller is a Class, caller.getResource(name)

  Parameters:

  name - The name of the resource to load

  caller - The instance or Class calling this method

• getResourceAsStream

  public static InputStream getResourceAsStream(String name, Object caller)

  This is a convenience method to load a resource as a stream.

  The algorithm used to find the resource is given in getResource()

  Parameters:

  name - The name of the resource to load

  caller - The instance or Class calling this method

• findMethod

  public static Method findMethod(Class clazz, String name, Class[] params) throws SecurityException

  Throws:

  SecurityException

• findDeclaredMethod

  public static Method findDeclaredMethod(Class clazz, String name, Class[] params) throws SecurityException

  Throws:

  SecurityException

• getFieldValue

  public static Object getFieldValue(String fieldPath) throws ClassNotFoundException, NoSuchFieldException, SecurityException, IllegalAccessException

  Throws:

  ClassNotFoundException

  NoSuchFieldException

  SecurityException

  IllegalAccessException

• getFieldValue

  public static Object getFieldValue(Class clazz, String fieldname) throws NoSuchFieldException, SecurityException, IllegalAccessException

  Throws:

  NoSuchFieldException

  SecurityException

  IllegalAccessException

• getIterator

  public static Iterator getIterator(Object obj) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException

  Retrieves an Iterator from or creates and Iterator for the specified object. This method is almost entirely copied from Engine's UberspectImpl class.

  Throws:

  NoSuchMethodException

  IllegalAccessException

  InvocationTargetException