Question: > 
> **Possible Duplicate:**  
> 
> [Interface vs Base class](https://stackoverflow.com/questions/56867/interface-vs-base-class) 
> 
> 
> 

A class implementing an `interface` has to implement all the methods of the interface, `but` if that class is implementing an `abstract class` is it necessary to implement all `abstract methods`?  

**If not**, can we create the `object` of that class which is implementing the `Abstract class`???

Answer: 
Software released under GPL or LGPL might not be what you're looking for, just because it requires that your product will be released under the same license.

Here is an overview of licenses with tons of links to explanations: <http://en.wikipedia.org/wiki/Comparison_of_free_software_licenses>
If you're providing a commercial application, presumably you'll also want to make sure you can support these tools - so will you be using the free version of jasper/pentaho or the commercial version?

Dont both companies have partner programmes? Perhaps thats worth looking in to. It sounds to me like you'll definately need some level of support from the owning company.. Maybe the question is, what happens if you embed the software under a partner agreement, then discontinue that agreement in the future?