Apex: ObjectUtil Class

public class ObjectUtil 
{
	public static String getObjectRecordTypeId(SObjectType sObjectType, String recordTypeName)
	{
		//Generate a map of tokens for all the Record Types for the desired object
		Map<String, RecordTypeInfo> recordTypeInfo = sObjectType.getDescribe().getRecordTypeInfosByName();
		system.debug('RECORD TYPES:' + recordTypeInfo);

		if(!recordTypeInfo.containsKey(recordTypeName))
			throw new RecordTypeException('Record type "'+ recordTypeName +'" does not exist.');

		//Retrieve the record type id by name
		return recordTypeInfo.get(recordTypeName).getRecordTypeId();
	}

	public class RecordTypeException extends Exception{}
}

getObjectRecordTypeId: http://www.jonathanbroquist.com/blog/2013/10/retrieving-sobject-recordtypeid-dynamically-with-salesforce/