CassandraCompositePrimaryKeyUnitTests.java

/*
 * Copyright 2016-2017 the original author or authors.
 *
 * 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 org.springframework.data.cassandra.mapping;

import static org.assertj.core.api.Assertions.*;
import static org.springframework.cassandra.core.cql.CqlIdentifier.*;

import java.io.Serializable;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

import org.junit.Before;
import org.junit.Test;
import org.springframework.cassandra.core.PrimaryKeyType;
import org.springframework.cassandra.core.cql.CqlIdentifier;
import org.springframework.cassandra.core.keyspace.ColumnSpecification;
import org.springframework.cassandra.core.keyspace.CreateTableSpecification;
import org.springframework.data.mapping.model.Property;
import org.springframework.data.util.ClassTypeInformation;
import org.springframework.util.ReflectionUtils;

import com.datastax.driver.core.DataType;

/**
 * Unit tests for {@link BasicCassandraPersistentProperty} with a composite primary key class.
 *
 * @author Matthew T. Adams
 * @author Mark Paluch
 */
public class CassandraCompositePrimaryKeyUnitTests {

	private static final CassandraSimpleTypeHolder SIMPLE_TYPE_HOLDER = new CassandraSimpleTypeHolder();

	@PrimaryKeyClass
	static class Key implements Serializable {

		private static final long serialVersionUID = 1L;

		@PrimaryKeyColumn(ordinal = 0, type = PrimaryKeyType.PARTITIONED) String z;

		@PrimaryKeyColumn(ordinal = 1, type = PrimaryKeyType.CLUSTERED) String a;

		@Override
		public int hashCode() {
			final int prime = 31;
			int result = 1;
			result = prime * result + ((a == null) ? 0 : a.hashCode());
			result = prime * result + ((z == null) ? 0 : z.hashCode());
			return result;
		}

		@Override
		public boolean equals(Object obj) {
			if (this == obj)
				return true;
			if (obj == null)
				return false;
			if (getClass() != obj.getClass())
				return false;
			Key other = (Key) obj;
			if (a == null) {
				if (other.a != null)
					return false;
			} else if (!a.equals(other.a))
				return false;
			if (z == null) {
				if (other.z != null)
					return false;
			} else if (!z.equals(other.z))
				return false;
			return true;
		}

	}

	@Table
	static class Thing {

		@PrimaryKey Key id;

		Date time;

		@Column("message") String text;
	}

	CassandraMappingContext context;
	CassandraPersistentEntity<?> thing;
	CassandraPersistentEntity<?> key;

	@Before
	public void setup() {
		context = new BasicCassandraMappingContext();
		thing = context.getRequiredPersistentEntity(ClassTypeInformation.from(Thing.class));
		key = context.getRequiredPersistentEntity(ClassTypeInformation.from(Key.class));
	}

	@Test
	public void validateMappingInfo() {

		Field field = ReflectionUtils.findField(Thing.class, "id");
		CassandraPersistentProperty property = new BasicCassandraPersistentProperty(Property.of(field), thing,
				SIMPLE_TYPE_HOLDER);
		assertThat(property.isIdProperty()).isTrue();
		assertThat(property.isCompositePrimaryKey()).isTrue();

		List<CqlIdentifier> expectedColumnNames = Arrays.asList(cqlId("z"), cqlId("a"));
		assertThat(expectedColumnNames.equals(property.getColumnNames())).isTrue();

		List<CqlIdentifier> actualColumnNames = new ArrayList<>();
		List<CassandraPersistentProperty> properties = property.getCompositePrimaryKeyProperties();
		for (CassandraPersistentProperty p : properties) {
			actualColumnNames.addAll(p.getColumnNames());
		}
		assertThat(expectedColumnNames.equals(actualColumnNames)).isTrue();

		CreateTableSpecification spec = context.getCreateTableSpecificationFor(thing);

		List<ColumnSpecification> partitionKeyColumns = spec.getPartitionKeyColumns();
		assertThat(partitionKeyColumns).hasSize(1);
		ColumnSpecification partitionKeyColumn = partitionKeyColumns.get(0);
		assertThat(partitionKeyColumn.getName().toCql()).isEqualTo("z");
		assertThat(partitionKeyColumn.getKeyType()).isEqualTo(PrimaryKeyType.PARTITIONED);
		assertThat(partitionKeyColumn.getType()).isEqualTo(DataType.text());

		List<ColumnSpecification> clusteredKeyColumns = spec.getClusteredKeyColumns();
		assertThat(clusteredKeyColumns).hasSize(1);
		ColumnSpecification clusteredKeyColumn = clusteredKeyColumns.get(0);
		assertThat(clusteredKeyColumn.getName().toCql()).isEqualTo("a");
		assertThat(clusteredKeyColumn.getKeyType()).isEqualTo(PrimaryKeyType.CLUSTERED);
		assertThat(partitionKeyColumn.getType()).isEqualTo(DataType.text());
	}
}