Need a java class performing connection and data collection from website

Hello, I would need a java application capable of connecting to the following website

http://ycharts.com/login

with mine or different account credentials, and by using their APIs, gets data from their server according to a separate specification of desired fields.

The java application should therefore allow the user to specify in input which data he needs by referring to the website list of available fields (e.g., company name, company industry, today stock price, etc.). Certain website fields (for instance stock prices) provide data which are available also as historical information (e.g., stock prices from 01-01-1970 until now), so in that case the user must be able to specify the date range for which data are needed.

All collected data need to be written as output in a text file suitable for further reading and inclusion in a database.

The java code performing the tasks illustrated above should then be suitable to be embedded as a plugin in a different application.

An API documentation from the website is available.

The website account credentials allow for different levels of download activity and in my case I am currently habilitated to the widest level of data collection.

I am interested in having the complete java code of the job in order to be able to modify it if needed. I would like to have a proposal that includes projected work hours, cost per hour, total cost of the project to be invoiced, and form of payment.

I look forward to your feedback.

Thank you.

Carlo