1.3. Indexing and Searching Example

Let us consider the simple case of linked Order and Customer entities mentioned above.

Example1Classes
Figure 1. Data Model

In this case, if all object attributes are indexed, indexing of two related instances of Order and Customer will create two Lucene documents with approximately the following content:

id: Order.id = "b671dbfc-c431-4586-adcc-fe8b84ca9617"
all: Order.number + Order.date + Order.amount = "001^2013-11-14^1000"
links: Customer.id = "f18e32bb-32c7-477a-980f-06e9cc4e7f40"
id: Customer.id = "f18e32bb-32c7-477a-980f-06e9cc4e7f40"
all: Customer.name + Customer.email = "John Doe^john.doe@mail.com"

Let’s assume our search string is "john":

  • First, the search is performed in all fields of both documents. The system will find the Customer entity and will include it in search results.

  • Then, the system will search for the identifier of the previously found customer in the links fields of all documents. The system will find the Order and will add it to search results as well.