/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.projection.impl;
import com.hazelcast.config.Config;
import com.hazelcast.config.InMemoryFormat;
import com.hazelcast.config.MapConfig;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.IMap;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.DataSerializable;
import com.hazelcast.projection.Projection;
import com.hazelcast.projection.Projections;
import com.hazelcast.query.QueryException;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.TestHazelcastInstanceFactory;
import com.hazelcast.test.annotation.ParallelTest;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import static com.hazelcast.spi.properties.GroupProperty.PARTITION_COUNT;
import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInAnyOrder;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelTest.class})
public class SingleAttributeProjectionTest extends HazelcastTestSupport {
@Rule
public ExpectedException expected = ExpectedException.none();
@Test(expected = IllegalArgumentException.class)
public void singleAttribute_attributeNull() {
Projections.<Map.Entry<String, Person>, Double>singleAttribute(null);
}
@Test(expected = IllegalArgumentException.class)
public void singleAttribute_attributeEmpty() {
Projections.<Map.Entry<String, Person>, Double>singleAttribute("");
}
@Test
public void singleAttribute() {
IMap<String, Person> map = getMapWithNodeCount();
populateMapWithPersons(map);
Collection<Double> result = map.project(Projections.<Map.Entry<String, Person>, Double>singleAttribute("age"));
assertThat(result, containsInAnyOrder(1.0d, 4.0d, 7.0d));
}
@Test
public void singleAttribute_key() {
IMap<String, Person> map = getMapWithNodeCount();
populateMapWithPersons(map);
Collection<String> result = map.project(Projections.<Map.Entry<String, Person>, String>singleAttribute("__key"));
assertThat(result, containsInAnyOrder("key1", "key2", "key3"));
}
@Test
public void singleAttribute_this() {
IMap<String, Integer> map = getMapWithNodeCount();
map.put("key1", 1);
map.put("key2", 2);
Collection<Integer> result = map.project(Projections.<Map.Entry<String, Integer>, Integer>singleAttribute("this"));
assertThat(result, containsInAnyOrder(1, 2));
}
@Test
public void singleAttribute_emptyMap() {
IMap<String, Person> map = getMapWithNodeCount();
Collection<Double> result = map.project(Projections.<Map.Entry<String, Person>, Double>singleAttribute("age"));
assertEquals(0, result.size());
}
@Test
public void singleAttribute_null() {
IMap<String, Person> map = getMapWithNodeCount();
map.put("key1", new Person(1.0d));
map.put("007", new Person(null));
Collection<Double> result = map.project(Projections.<Map.Entry<String, Person>, Double>singleAttribute("age"));
assertThat(result, containsInAnyOrder(null, 1.0d));
}
@Test
public void singleAttribute_nonExistingProperty() {
IMap<String, Person> map = getMapWithNodeCount();
populateMapWithPersons(map);
Projection<Map.Entry<String, Person>, Double> projection = Projections.singleAttribute("age123");
expected.expect(QueryException.class);
map.project(projection);
}
private <K, V> IMap<K, V> getMapWithNodeCount() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory(1);
MapConfig mapConfig = new MapConfig()
.setName("aggr")
.setInMemoryFormat(InMemoryFormat.OBJECT);
Config config = new Config()
.setProperty(PARTITION_COUNT.getName(), "3")
.addMapConfig(mapConfig);
HazelcastInstance instance = factory.newInstances(config)[0];
return instance.getMap("aggr");
}
private void populateMapWithPersons(IMap<String, Person> map) {
map.put("key1", new Person(1.0d));
map.put("key2", new Person(4.0d));
map.put("key3", new Person(7.0d));
}
public static class Person implements DataSerializable {
public Double age;
public Person() {
}
public Person(Double age) {
this.age = age;
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeObject(age);
}
@Override
public void readData(ObjectDataInput in) throws IOException {
age = in.readObject();
}
}
}