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Cassandra support for Spring Data
/*
* Copyright 2016-2023 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
*
* https://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 java.lang.reflect.Method;
import org.springframework.data.cassandra.core.mapping.CassandraPersistentEntity;
import org.springframework.data.cassandra.core.mapping.CassandraPersistentProperty;
import org.springframework.data.cassandra.repository.query.CassandraParameters.CassandraParameter;
import org.springframework.data.mapping.context.MappingContext;
import org.springframework.data.projection.ProjectionFactory;
import org.springframework.data.repository.core.RepositoryMetadata;
import org.springframework.data.repository.util.ReactiveWrapperConverters;
import org.springframework.data.repository.util.ReactiveWrappers;
import org.springframework.data.util.Lazy;
/**
* Reactive specific implementation of {@link CassandraQueryMethod}.
*
* @author Mark Paluch
* @since 2.0
*/
public class ReactiveCassandraQueryMethod extends CassandraQueryMethod {
private final Lazy isCollectionQuery;
/**
* Create a new {@link ReactiveCassandraQueryMethod} from the given {@link Method}.
*
* @param method must not be {@literal null}.
* @param metadata must not be {@literal null}.
* @param projectionFactory must not be {@literal null}.
* @param mappingContext must not be {@literal null}.
*/
public ReactiveCassandraQueryMethod(Method method, RepositoryMetadata metadata, ProjectionFactory projectionFactory,
MappingContext, ? extends CassandraPersistentProperty> mappingContext) {
super(method, metadata, projectionFactory, mappingContext);
this.isCollectionQuery = Lazy.of(() -> (!(isPageQuery() || isSliceQuery())
&& ReactiveWrappers.isMultiValueType(metadata.getReturnType(method).getType())) || super.isCollectionQuery());
}
/*
* (non-Javadoc)
* @see org.springframework.data.repository.query.QueryMethod#isCollectionQuery()
*/
@Override
public boolean isCollectionQuery() {
return isCollectionQuery.get();
}
/*
* All reactive query methods are streaming queries.
* (non-Javadoc)
* @see org.springframework.data.repository.query.QueryMethod#isStreamQuery()
*/
@Override
public boolean isStreamQuery() {
return true;
}
/**
* Check if the given {@link org.springframework.data.repository.query.QueryMethod} receives a reactive parameter
* wrapper as one of its parameters.
*
* @return
*/
public boolean hasReactiveWrapperParameter() {
for (CassandraParameter cassandraParameter : getParameters()) {
if (ReactiveWrapperConverters.supports(cassandraParameter.getType())) {
return true;
}
}
return false;
}
}