User Defined Catalog

[andersy005]

Brainstorming

• Create an abstract class representing a user defined catalog

class Catalog(object):
    """
    An abstract class representing a user defined Catalog.
    All user defined catalogs should subclass it. All subclasses should override
    ``build_catalog``, ``activate_catalog``, ``search``, ``get_files``, 
    """
    def build_catalog(self):
        """Builds catalog from a user defined YAML file"""
        raise NotImplementedError
        
    def activate_catalog(self):
        """Set the active catalog to work with"""
        raise NotImplementedError
        
    def search(self):
        """Find entries matching a query"""
        raise NotImplementedError
        
    def get_files(self):
        """Returns list of files matching a query"""
        raise NotImplementedError

Ccing @matt-long, let's discuss more about this.