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Cassandra support for Spring Data
/*
* Copyright 2016-2019 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 reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.core.publisher.MonoProcessor;
import java.util.ArrayList;
import java.util.List;
import org.springframework.data.repository.util.ReactiveWrapperConverters;
import org.springframework.data.repository.util.ReactiveWrappers;
/**
* Reactive {@link org.springframework.data.repository.query.ParametersParameterAccessor} implementation that subscribes
* to reactive parameter wrapper types upon creation. This class performs synchronization when acessing parameters.
*
* @author Mark Paluch
* @since 2.0
*/
class ReactiveCassandraParameterAccessor extends CassandraParametersParameterAccessor {
private final Object[] values;
private final List> subscriptions;
@SuppressWarnings("ConstantConditions")
ReactiveCassandraParameterAccessor(CassandraQueryMethod method, Object[] values) {
super(method, values);
this.values = values;
this.subscriptions = new ArrayList<>(values.length);
for (Object value : values) {
if (value == null || !ReactiveWrappers.supports(value.getClass())) {
subscriptions.add(null);
continue;
}
if (ReactiveWrappers.isSingleValueType(value.getClass())) {
subscriptions.add(ReactiveWrapperConverters.toWrapper(value, Mono.class).toProcessor());
} else {
subscriptions.add(ReactiveWrapperConverters.toWrapper(value, Flux.class).collectList().toProcessor());
}
}
}
/* (non-Javadoc)
* @see org.springframework.data.repository.query.ParametersParameterAccessor#getValue(int)
*/
@SuppressWarnings({ "unchecked", "ConstantConditions" })
@Override
protected T getValue(int index) {
return (subscriptions.get(index) != null ? (T) subscriptions.get(index).block() : super.getValue(index));
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.repository.query.CassandraParametersParameterAccessor#getValues()
*/
@Override
public Object[] getValues() {
Object[] result = new Object[values.length];
for (int index = 0; index < result.length; index++) {
result[index] = getValue(index);
}
return result;
}
/* (non-Javadoc)
* @see org.springframework.data.repository.query.ParametersParameterAccessor#getBindableValue(int)
*/
public Object getBindableValue(int index) {
return getValue(getParameters().getBindableParameter(index).getIndex());
}
}