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Generator.java
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Generator.java
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/**
* Copyright (C) 2017 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jsonld.environment;
import cz.cvut.kbss.jsonld.environment.model.Employee;
import cz.cvut.kbss.jsonld.environment.model.Organization;
import cz.cvut.kbss.jsonld.environment.model.Person;
import cz.cvut.kbss.jsonld.environment.model.User;
import java.net.URI;
import java.util.*;
public class Generator {
public static final String URI_BASE = "http://krizik.felk.cvut.cz/ontologies/jb4jsonld#";
private static final Random RAND = new Random();
private Generator() {
throw new AssertionError();
}
/**
* Returns a (pseudo)random positive integer between 1 (inclusive) and {@code max} (exclusive).
*
* @param max Upper bound
* @return random integer
*/
public static int randomCount(int max) {
return randomCount(1, max);
}
/**
* Returns a (pseudo)random positive integer between {@code min} (inclusive) and {@code max} (exclusive).
*
* @param min Lower bound
* @param max Upper bound
* @return random integer
*/
public static int randomCount(int min, int max) {
assert min >= 0;
assert max > 1;
assert min < max;
int res;
do {
res = RAND.nextInt(max);
} while (res < min);
return res;
}
public static boolean randomBoolean() {
return RAND.nextBoolean();
}
public static User generateUser() {
final User user = new User();
setUserAttributes(user);
return user;
}
public static Set<User> generateUsers() {
final Set<User> users = new HashSet<>();
for (int i = 0; i < randomCount(10); i++) {
users.add(generateUser());
}
return users;
}
private static void setUserAttributes(User user) {
final int number = RAND.nextInt();
user.setUsername("user" + number);
user.setFirstName("FirstName" + number);
user.setLastName("LastName" + number);
user.setAdmin(randomBoolean());
user.setUri(generateUri());
}
public static URI generateUri() {
return URI.create(URI_BASE + RAND.nextInt());
}
public static Employee generateEmployee() {
final Employee employee = new Employee();
setUserAttributes(employee);
final Organization company = generateOrganization();
employee.setEmployer(company);
return employee;
}
public static Person generatePerson() {
final Person person = new Person();
person.setUri(Generator.generateUri());
person.setFirstName("Catherine");
person.setLastName("Halsey");
person.setProperties(Generator.generateProperties(false));
return person;
}
public static Organization generateOrganization() {
final Organization org = new Organization();
org.setUri(generateUri());
org.setDateCreated(new Date());
org.setName("Organization" + RAND.nextInt());
org.setBrands(new HashSet<>());
for (int i = 0; i < randomCount(10); i++) {
org.getBrands().add("Brandy" + i);
}
return org;
}
/**
* Generates random count of random properties with random values.
*
* @param singletons Whether the values should be singletons or collections of more than 1 value
* @return The generated properties
*/
public static Map<String, Set<String>> generateProperties(boolean singletons) {
final Map<String, Set<String>> map = new HashMap<>();
for (int i = 0; i < Generator.randomCount(5, 10); i++) {
final String property = Generator.generateUri().toString();
if (singletons) {
map.put(property, Collections.singleton(Generator.generateUri().toString()));
} else {
final Set<String> value = new HashSet<>();
for (int j = 0; j < Generator.randomCount(2, 5); j++) {
value.add(Generator.generateUri().toString());
}
map.put(property, value);
}
}
return map;
}
}