Level toLevel()

in src/main/java/org/apache/log4j/helpers/OptionConverter.java [186:254]
54 lines of code
13 McCabe index (conditional complexity)

  Level toLevel(String value, Level defaultValue) {
    if(value == null)
      return defaultValue;
      
    value = value.trim();

    int hashIndex = value.indexOf('#');
    if (hashIndex == -1) {
      if("NULL".equalsIgnoreCase(value)) {
	return null;
      } else {
	// no class name specified : use standard Level class
	return(Level) Level.toLevel(value, defaultValue);
      }
    }

    Level result = defaultValue;

    String clazz = value.substring(hashIndex+1);
    String levelName = value.substring(0, hashIndex);

    // This is degenerate case but you never know.
    if("NULL".equalsIgnoreCase(levelName)) {
	return null;
    }

    LogLog.debug("toLevel" + ":class=[" + clazz + "]"
		 + ":pri=[" + levelName + "]");

    try {
      Class customLevel = Loader.loadClass(clazz);

      // get a ref to the specified class' static method
      // toLevel(String, org.apache.log4j.Level)
      Class[] paramTypes = new Class[] { String.class,
					 org.apache.log4j.Level.class
                                       };
      java.lang.reflect.Method toLevelMethod =
                      customLevel.getMethod("toLevel", paramTypes);

      // now call the toLevel method, passing level string + default
      Object[] params = new Object[] {levelName, defaultValue};
      Object o = toLevelMethod.invoke(null, params);

      result = (Level) o;
    } catch(ClassNotFoundException e) {
      LogLog.warn("custom level class [" + clazz + "] not found.");
    } catch(NoSuchMethodException e) {
      LogLog.warn("custom level class [" + clazz + "]"
        + " does not have a class function toLevel(String, Level)", e);
    } catch(java.lang.reflect.InvocationTargetException e) {
        if (e.getTargetException() instanceof InterruptedException
                || e.getTargetException() instanceof InterruptedIOException) {
            Thread.currentThread().interrupt();
        }
      LogLog.warn("custom level class [" + clazz + "]"
		   + " could not be instantiated", e);
    } catch(ClassCastException e) {
      LogLog.warn("class [" + clazz
        + "] is not a subclass of org.apache.log4j.Level", e);
    } catch(IllegalAccessException e) {
      LogLog.warn("class ["+clazz+
		   "] cannot be instantiated due to access restrictions", e);
    } catch(RuntimeException e) {
      LogLog.warn("class ["+clazz+"], level ["+levelName+
		   "] conversion failed.", e);
    }
    return result;
   }