Say you were to create a search engine that can accept a query statement under the form of a String. The statement can be used to retrieve different types of objects with a given set of characteristics and possibly linked to other objects. In plain english or pseudo-code using an OOP approach, how would you go about parsing and processing statements as follows to get the series of desired objects ?

• get fruit with colour green
• get variety of apples, pears from Andy
• get strawberry with colour "deep red" and origin not Spain
• get total of sales of melons between 2010-10-10 and 2010-12-30
• get last deliverydate of bananas from "Pete" and state not sold

Hope the question is clear. If not I'll be more than happy to reformulate.

P.S: This isn't homework ;)