design patterns in java -- 2

I'm looking to hire someone to design patterns in Java utilizing the Factory Pattern, with sample code provided to illustrate pattern usage. The explanation should be detailed, with code samples included. I'm looking for a knowledgeable individual who can provide an understanding of the concepts as well as the implementation needed to create the pattern. As part of the project I require a thorough explanation of the relevant coding techniques and decision-making process in order to achieve correct functionality. Examples should be included to illustrate the idea, as well as code samples where appropriate. The project should also include sufficient comment documentation to ensure the code is understandable and well-written.