private static void vis(String name, Class type, Object value, String indent) throws Exception {
if (value == null) { // nothing interesting to say
prt(indent + name + ": null");
} else if (type.isPrimitive()) { // primitive
if (type == Boolean.TYPE) prt(indent + name + ": " + ((Boolean) value).booleanValue());
else if (type == Character.TYPE) prt(indent + name + ": " + ((Character) value).charValue());
else if (type == Byte.TYPE) prt(indent + name + ": " + ((Byte) value).byteValue());
else if (type == Short.TYPE) prt(indent + name + ": " + ((Short) value).shortValue());
else if (type == Integer.TYPE) prt(indent + name + ": " + ((Integer) value).intValue());
else if (type == Long.TYPE) prt(indent + name + ": " + ((Long) value).longValue());
else if (type == Float.TYPE) prt(indent + name + ": " + ((Float) value).floatValue());
else if (type == Double.TYPE) prt(indent + name + ": " + ((Double) value).doubleValue());
else throw new IllegalArgumentException(); // NotReached
} else if (type.isArray()) { // array
Class componentType = type.getComponentType();
prt(indent + name + ": " + componentType.getName() + "[]");
for (int i = 0, n = Array.getLength(value); i < n; ++i)
vis("" + i, componentType, Array.get(value, i), indent + " ");
} else if (type.getName()
.equals("java.lang.String")) { // treat frequently used type as special case
prt(indent + name + ": \"" + (String) value + "\"");
} else { // class (or interface)
Field[] fields =
type
.getFields(); // !!note: Sun's jvm only returns *public* fields, jx returns *all*
// fields
if (fields.length == 0) { // no fields
// prt(indent + name + ": declared as " + type.getName() + " actually is " + (value == null
// ? "null" : value.getClass().getName()) + " self-described as \"" + value + "\"");
prt(
indent
+ name
+ ": declared as "
+ type.getName()
+ " actually is "
+ (value == null ? "null" : value.getClass().getName()));
} else { // use fields to describe object
prt(indent + name + ": " + type.getName());
for (int i = 0, n = fields.length; i < n; ++i) {
Field f = fields[i];
if (Modifier.isStatic(f.getModifiers()))
vis(f.getName(), f.getType(), f.get(value), indent + " static ");
else vis(f.getName(), f.getType(), f.get(value), indent + " ");
}
}
}
}
// Visualize an object
// Taken: name
// type
// value (or wrapper, if primitive type)
//
static void visualize(String name, Class type, Object value) {
SystemOut.println("===");
try {
vis(name, type, value, "");
} catch (Exception e) {
e.printStackTrace(System.out);
}
}