Rendering Debugging helper

FieldDebug.java

public class FieldDebug {

  /**
   * Call this code from a debugger evaluation from some working code and some code that
   * doesn't work then compare the two dumps. Comparing the two will allow you to see the
   * differences and change your code to eliminate the differences by invoking methods on
   * the RenderSystem.
   */
  public static void printGlStateManager() throws IllegalAccessException {
      final StringBuilder stringBuilder = new StringBuilder();
      appendClassFields(stringBuilder, GlStateManager.class, null, 15, 0);
      System.out.println(stringBuilder.toString());
  }

  public static void appendClassFields(StringBuilder stringBuilder, Class<?> clazz, Object instance, int maxIterations, int currentIteration) throws IllegalAccessException {
      if (maxIterations <= currentIteration) {
          return;
      }
      for (final Field field : clazz.getDeclaredFields()) {
          field.setAccessible(true);
          for (int i = 0; i < currentIteration; ++i) {
              stringBuilder.append("  ");
          }
          if (field.getType().isPrimitive())
              stringBuilder
                      .append(field.getName())
                      .append(": ")
                      .append(field.get(instance))
                      .append("\n");
          else {
              stringBuilder
                      .append(field.getName())
                      .append(": ")
                      .append(field.getType().getSimpleName())
                      .append("\n");
              appendClassFields(stringBuilder, field.getType(), field.get(instance), maxIterations, currentIteration + 1);
          }
      }
  }

}