Boolean Model for Information Retrieval

This is a Java implementation of a Boolean Model for Information Retrieval. This code was developed as a project for the Natural Language Processing and Information Retrieval class at Chung-Ang University during the 1st semester of 2023.

Usage

To use this Boolean Model, create a new instance of the BooleanModel class and add documents to the index using the addDocument method. To search for documents, use the search method with a query as input.

Class Overview

BooleanModel

This class represents a Boolean Model for Information Retrieval. It contains an inverted index and methods to add documents to the index and search for documents based on a query.

Constructor

The BooleanModel constructor initializes the inverted index as an empty HashMap.

Methods

• addDocument(int docId, String[] terms): adds a document to the inverted index.
• removeDocument(int docId, String[] terms): removes a document from the inverted index.
• search(String query): searches the inverted index for documents containing all terms in the query.

Private Methods

• intersect(List<Integer> list1, List<Integer> list2): computes the intersection of two postings lists.