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package com.pgvector;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import java.util.ArrayList;

import java.util.List;

import com.pgvector.PGvector;

import org.postgresql.PGConnection;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;

import static org.junit.jupiter.api.Assertions.assertNull;

public class JDBCJavaTest {

@Test

void testReadText() throws SQLException {

example(false);

}

@Test

void testReadBinary() throws SQLException {

example(true);

}

void example(boolean readBinary) throws SQLException {

Connection conn = DriverManager.getConnection("jdbc:postgresql://localhost:5432/pgvector_java_test");

if (readBinary) {

conn.unwrap(PGConnection.class).setPrepareThreshold(-1);

}

Statement setupStmt = conn.createStatement();

setupStmt.executeUpdate("CREATE EXTENSION IF NOT EXISTS vector");

setupStmt.executeUpdate("DROP TABLE IF EXISTS jdbc_items");

PGvector.addVectorType(conn);

Statement createStmt = conn.createStatement();

createStmt.executeUpdate("CREATE TABLE jdbc_items (id bigserial PRIMARY KEY, embedding vector(3))");

PreparedStatement insertStmt = conn.prepareStatement("INSERT INTO jdbc_items (embedding) VALUES (?), (?), (?), (?)");

insertStmt.setObject(1, new PGvector(new float[] {1, 1, 1}));

insertStmt.setObject(2, new PGvector(new float[] {2, 2, 2}));

insertStmt.setObject(3, new PGvector(new float[] {1, 1, 2}));

insertStmt.setObject(4, null);

insertStmt.executeUpdate();

PreparedStatement neighborStmt = conn.prepareStatement("SELECT * FROM jdbc_items ORDER BY embedding <-> ? LIMIT 5");

neighborStmt.setObject(1, new PGvector(new float[] {1, 1, 1}));

ResultSet rs = neighborStmt.executeQuery();

List<Long> ids = new ArrayList<>();

List<PGvector> embeddings = new ArrayList<>();

while (rs.next()) {

ids.add(rs.getLong("id"));

embeddings.add((PGvector) rs.getObject("embedding"));

}

assertArrayEquals(new Long[] {1L, 3L, 2L, 4L}, ids.toArray());

assertArrayEquals(new float[] {1, 1, 1}, embeddings.get(0).toArray());

assertArrayEquals(new float[] {1, 1, 2}, embeddings.get(1).toArray());

assertArrayEquals(new float[] {2, 2, 2}, embeddings.get(2).toArray());

assertNull(embeddings.get(3));

Statement indexStmt = conn.createStatement();

indexStmt.executeUpdate("CREATE INDEX ON jdbc_items USING ivfflat (embedding vector_l2_ops) WITH (lists = 100)");

conn.close();

}

@Test

void testHalfvec() throws SQLException {

Connection conn = DriverManager.getConnection("jdbc:postgresql://localhost:5432/pgvector_java_test");

Statement setupStmt = conn.createStatement();

setupStmt.executeUpdate("CREATE EXTENSION IF NOT EXISTS vector");

setupStmt.executeUpdate("DROP TABLE IF EXISTS jdbc_items");

PGhalfvec.addHalfvecType(conn);

Statement createStmt = conn.createStatement();

createStmt.executeUpdate("CREATE TABLE jdbc_items (id bigserial PRIMARY KEY, embedding halfvec(3))");

PreparedStatement insertStmt = conn.prepareStatement("INSERT INTO jdbc_items (embedding) VALUES (?), (?), (?), (?)");

insertStmt.setObject(1, new PGhalfvec(new float[] {1, 1, 1}));

insertStmt.setObject(2, new PGhalfvec(new float[] {2, 2, 2}));

insertStmt.setObject(3, new PGhalfvec(new float[] {1, 1, 2}));

insertStmt.setObject(4, null);

insertStmt.executeUpdate();

PreparedStatement neighborStmt = conn.prepareStatement("SELECT * FROM jdbc_items ORDER BY embedding <-> ? LIMIT 5");

neighborStmt.setObject(1, new PGhalfvec(new float[] {1, 1, 1}));

ResultSet rs = neighborStmt.executeQuery();

List<Long> ids = new ArrayList<>();

List<PGhalfvec> embeddings = new ArrayList<>();

while (rs.next()) {

ids.add(rs.getLong("id"));

embeddings.add((PGhalfvec) rs.getObject("embedding"));

}

assertArrayEquals(new Long[] {1L, 3L, 2L, 4L}, ids.toArray());

assertArrayEquals(new float[] {1, 1, 1}, embeddings.get(0).toArray());

assertArrayEquals(new float[] {1, 1, 2}, embeddings.get(1).toArray());

assertArrayEquals(new float[] {2, 2, 2}, embeddings.get(2).toArray());

assertNull(embeddings.get(3));

}

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