/*
* 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.repository.query;
import org.springframework.data.cassandra.convert.UpdateMapper;
import org.springframework.data.cassandra.core.ReactiveCassandraOperations;
import org.springframework.data.cassandra.core.StatementFactory;
import org.springframework.data.cassandra.core.query.Query;
import org.springframework.data.cassandra.mapping.CassandraMappingContext;
import org.springframework.data.cassandra.mapping.CassandraPersistentEntity;
import org.springframework.data.repository.query.QueryCreationException;
import org.springframework.data.repository.query.RepositoryQuery;
import org.springframework.data.repository.query.parser.PartTree;
import com.datastax.driver.core.Statement;
/**
* Reactive PartTree {@link RepositoryQuery} implementation for Cassandra.
*
* @author Mark Paluch
* @since 2.0
*/
public class ReactivePartTreeCassandraQuery extends AbstractReactiveCassandraQuery {
private final CassandraMappingContext mappingContext;
private final PartTree tree;
private final StatementFactory statementFactory;
/**
* Create a new {@link ReactivePartTreeCassandraQuery} from the given {@link ReactiveCassandraQueryMethod} and
* {@link ReactiveCassandraOperations}.
*
* @param queryMethod must not be {@literal null}.
* @param operations must not be {@literal null}.
*/
public ReactivePartTreeCassandraQuery(ReactiveCassandraQueryMethod queryMethod,
ReactiveCassandraOperations operations) {
super(queryMethod, operations);
this.tree = new PartTree(queryMethod.getName(), queryMethod.getEntityInformation().getJavaType());
this.mappingContext = operations.getConverter().getMappingContext();
this.statementFactory = new StatementFactory(new UpdateMapper(operations.getConverter()));
}
/**
* Returns the {@link CassandraMappingContext} used by this query to access mapping meta-data used to
* store (map) objects to Cassandra tables.
*
* @return the {@link CassandraMappingContext} used by this query.
* @see org.springframework.data.cassandra.mapping.CassandraMappingContext
*/
protected CassandraMappingContext getMappingContext() {
return this.mappingContext;
}
/**
<<<<<<< 85e5d32f4c6db62b63513c14864f7625d7813060
* Returns the {@link StatementFactory} used by this query to construct and run Cassandra CQL statements.
*
* @return the {@link StatementFactory} used by this query to construct and run Cassandra CQL statements.
=======
* Returns the {@link StatementFactory} used by this template to construct and run Cassandra CQL statements.
*
* @return the {@link StatementFactory} used by this template to construct and run Cassandra CQL statements.
>>>>>>> DATACASS-343 - Polish.
* @see org.springframework.data.cassandra.core.StatementFactory
*/
protected StatementFactory getStatementFactory() {
return this.statementFactory;
}
/**
* Return the {@link PartTree} backing the query.
*
* @return the tree
*/
protected PartTree getTree() {
return this.tree;
}
/*
* (non-Javadoc)
* @see org.springframework.data.cassandra.repository.query.AbstractCassandraQuery#createQuery(org.springframework.data.cassandra.repository.query.CassandraParameterAccessor, boolean)
*/
@Override
protected Statement createQuery(CassandraParameterAccessor parameterAccessor) {
CassandraQueryCreator queryCreator =
new CassandraQueryCreator(getTree(), parameterAccessor, getMappingContext());
Query query = queryCreator.createQuery();
try {
if (getTree().isLimiting()) {
query.limit(getTree().getMaxResults());
}
CassandraPersistentEntity<?> persistentEntity =
getMappingContext().getRequiredPersistentEntity(getQueryMethod().getDomainClass());
return getStatementFactory().select(query, persistentEntity);
} catch (RuntimeException e) {
throw QueryCreationException.create(getQueryMethod(), e);
}
}
}