Field Detail

• INVOCATION_ERROR

  public static final Object INVOCATION_ERROR

  This object is returned by invokeMethod(..) when an error occurs.

Constructor Detail

• Reflection

  public Reflection()

Method Detail

• getFieldValue

  public static Object getFieldValue(String className,
                                     String fieldName)

  Uses reflection to retrieve a static field from a class.

  Returns:

  null if an error occurred retrieving this value

• parseCommaSeparatedList

  protected static Object[] parseCommaSeparatedList(String arguments)

  Return an array of objects based on a comma-separated description of its contents.

• parse

  public static Object parse(String input)

  Parse an object as null, an int, a long, a float, a String, a static field, or "new xyz(..)" (where ".." looks recursively for a comma-separated list of arguments)).

  For example, you can call:
  parse( "new Color( 255, 0, 128 )" );
parse( "new com.bric.swing.resources.ArrowIcon( javax.swing.SwingConstants.EAST, 24, 24 )" );
parse( "new com.bric.swing.resources.TriangleIcon( javax.swing.SwingConstants.EAST, 24, 24, new Color(0)" );

  The class name/constants must be fully qualified.

• construct

  protected static <T> T construct(Class<T> t,
                                   String arguments)

  This constructs an instance of t if a constructor is found that matches the arguments provided. This will not identify a varargs constructor. If multiple constructors match the arguments provided, this method will choose one to use

  Parameters:

  t - the type of class to construct.

  arguments - a comma separated list of simple arguments, such as primitives, strings, or static fields.

  Returns:

  a new instance of t created using the arguments provided, or an exception will be thrown.

• invokeMethod

  public static Object invokeMethod(Class<?> c,
                                    Object obj,
                                    String methodName,
                                    Object[] arguments)

  This uses reflection to call a method that may not exist in the compiling JVM.

  Returns:

  INVOCATION_ERROR if an error occurs (details are printed to the console), or the return value of the invocation.

• nameStaticField

  public static String nameStaticField(Class<?> c,
                                       Object value)

  This debugging tool combs through a class and tells you what public static field has the value you've provided.

  For example, you can call:
  nameStaticField(BufferedImage.class,new Integer(BufferedImage.TYPE_INT_ARGB))
  And this method will return "TYPE_INT_ARGB".

  Parameters:

  c - the class of interest

  value - the value. Primitives must be wrapped.

  Returns:

  the string of the field with that value, or null if not hits were found. (Or if multiple hits were found, this returns a list of possible matches.)