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Generators.java
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Generators.java
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/**
* Copyright (C) 2020 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.jopa.test.environment;
import cz.cvut.kbss.jopa.test.OWLClassA;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.time.OffsetDateTime;
import java.time.temporal.ChronoUnit;
import java.util.*;
import java.util.stream.Collectors;
/**
* Generators of test data.
*/
public abstract class Generators {
private static final int DEFAULT_MIN = 5;
private static final int DEFAULT_SIZE = 10;
private static final Set<String> TYPES = getTypes();
private static final String PROPERTY_URI_BASE = "http://krizik.felk.cvut.cz/ontologies/jopa/attributes#property";
private static final String TYPE_URI_BASE = "http://krizik.felk.cvut.cz/ontologies/jopa/entities#Entity";
private static final Random RANDOM = new Random();
private Generators() {
// Private constructor
}
public static List<OWLClassA> createSimpleList() {
return createSimpleList(randomPositiveInt(DEFAULT_MIN, DEFAULT_SIZE));
}
public static List<OWLClassA> createSimpleList(int size) {
assert size > 0;
final List<OWLClassA> lst = new ArrayList<>(size);
generateInstances(lst, "http://krizik.felk.cvut.cz/ontologies/jopa/tests/entityASimple",
size);
return lst;
}
public static List<OWLClassA> createReferencedList() {
return createReferencedList(randomPositiveInt(DEFAULT_MIN, DEFAULT_SIZE));
}
public static List<OWLClassA> createReferencedList(int size) {
assert size > 0;
final List<OWLClassA> lst = new ArrayList<>(size);
generateInstances(lst,
"http://krizik.felk.cvut.cz/ontologies/jopa/tests/entityAReferenced", size);
return lst;
}
public static List<URI> createListOfIdentifiers() {
return createSimpleList().stream().map(OWLClassA::getUri).collect(Collectors.toList());
}
public static Set<OWLClassA> createSimpleSet() {
return createSimpleSet(randomPositiveInt(DEFAULT_MIN, DEFAULT_SIZE));
}
public static Set<OWLClassA> createSimpleSet(int size) {
assert size > 0;
final Set<OWLClassA> set = new HashSet<>(size);
generateInstances(set, "http://krizik.felk.cvut.cz/ontologies/jopa/tests/entityASimpleSet",
size);
return set;
}
public static Map<String, Set<String>> createProperties() {
return createProperties(randomPositiveInt(DEFAULT_MIN, DEFAULT_SIZE));
}
public static Map<String, Set<String>> createProperties(int size) {
assert size > 0;
final Map<String, Set<String>> m = new HashMap<>(size);
int counter = randomInt(1000);
for (int i = 0; i < size; i++) {
final Set<String> value = new HashSet<>(4);
for (int j = 0; j < size; j++) {
value.add("http://krizik.felk.cvut.cz/ontologies/jopa/tests/ObjectPropertyValue_" + j + "_"
+ counter);
}
m.put(PROPERTY_URI_BASE + counter, value);
counter++;
}
return m;
}
public static Map<URI, Set<Object>> createTypedProperties() {
return createTypedProperties(randomPositiveInt(DEFAULT_MIN, DEFAULT_SIZE));
}
public static Map<URI, Set<Object>> createTypedProperties(int size) {
assert size > 0;
final Map<URI, Set<Object>> props = new HashMap<>(size);
int counter = randomInt(1000);
for (int i = 0; i < size; i++) {
final Set<Object> value = new HashSet<>();
for (int j = 0; j < size; j++) {
// Generate either an individual's URI or random data value. But same type for a property
// (so that the property is either object or data, but not both)
if (counter % 2 == 0) {
value.add(URI.create("http://krizik.felk.cvut.cz/ontologies/jopa/tests/Property_" + counter +
"Individual_" + j));
} else {
value.add(generateRandomPropertyValue(j, counter));
}
}
props.put(URI.create(PROPERTY_URI_BASE + counter), value);
counter++;
}
return props;
}
private static Object generateRandomPropertyValue(int valueIndex, int propertyIndex) {
final int random = randomInt(6);
switch (random) {
case 0: // boolean
return valueIndex % 2 == 0;
case 1: // int
return valueIndex;
case 2: // long
return System.currentTimeMillis();
case 3: //double
return ((double) propertyIndex + 1) / (valueIndex + 1);
case 4: // date
// Generate date rounded to seconds to prevent issues with time rounding
return OffsetDateTime.now().truncatedTo(ChronoUnit.MILLIS);
case 5: // String
return "TypedProperty_" + propertyIndex + "Value_" + valueIndex;
default:
throw new IllegalArgumentException();
}
}
private static void generateInstances(Collection<OWLClassA> col, String uriBase, int size) {
assert size > 0;
int counter = randomInt(1000);
for (int i = 0; i < size; i++) {
final OWLClassA a = new OWLClassA();
a.setUri(URI.create(uriBase + counter));
a.setStringAttribute("stringAttributeeee" + counter);
counter++;
a.setTypes(TYPES);
col.add(a);
}
}
private static Set<String> getTypes() {
final Set<String> types = new HashSet<>(3);
types.add("http://krizik.felk.cvut.cz/ontologies/jopa/entities#OWLClassA");
types.add("http://krizik.felk.cvut.cz/ontologies/jopa/entities#OWLClassX");
types.add("http://krizik.felk.cvut.cz/ontologies/jopa/entities#OWLClassZ");
return types;
}
public static Set<URL> createUrls() {
return Generators.createSimpleList().stream().map(a -> {
try {
return a.getUri().toURL();
} catch (MalformedURLException e) {
throw new IllegalArgumentException(e);
}
}).collect(Collectors.toSet());
}
public static int randomInt() {
return RANDOM.nextInt();
}
public static int randomInt(int max) {
return RANDOM.nextInt(max);
}
/**
* Gets a random int between {@code min} and {@code max}.
*
*
* @param min lower bound (inclusive)
* @param max upper bound (exclusive)
* @return Random positive integer
*/
public static int randomPositiveInt(int min, int max) {
assert min >= 0;
if (max <= min) {
throw new IllegalArgumentException("Upper bound has to be greater than the lower bound.");
}
int rand;
do {
rand = RANDOM.nextInt(max);
} while (rand < min);
return rand;
}
public static boolean randomBoolean() {
return RANDOM.nextBoolean();
}
public static Set<URI> createUriTypes() {
final int count = randomPositiveInt(DEFAULT_MIN, DEFAULT_SIZE);
final Set<URI> result = new HashSet<>();
for (int i = 0; i < count; i++) {
result.add(URI.create(TYPE_URI_BASE + randomInt(Integer.MAX_VALUE)));
}
return result;
}
/**
* Generates a random URI.
*
* @return Random URI
*/
public static URI generateUri() {
return URI.create("http://krizik.felk.cvut.cz/ontologies/jopa/individuals#instance" +
randomInt(Integer.MAX_VALUE));
}
/**
* Gets random item from the specified list.
* @param items List of items
* @return Random item from the list
*/
public static <T> T getRandomItem(List<T> items) {
return items.get(randomInt(items.size()));
}
}