/*
* Copyright 2013-2017 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.mongodb.core.aggregation;
import org.bson.Document;
import org.springframework.data.mongodb.core.query.CriteriaDefinition;
import org.springframework.util.Assert;
/**
* Encapsulates the {@code $match}-operation.
* <p>
* We recommend to use the static factory method
* {@link Aggregation#match(org.springframework.data.mongodb.core.query.Criteria)} instead of creating instances of this
* class directly.
*
* @author Sebastian Herold
* @author Thomas Darimont
* @author Oliver Gierke
* @since 1.3
* @see <a href="https://docs.mongodb.com/manual/reference/operator/aggregation/match/">MongoDB Aggregation Framework: $match</a>
*/
public class MatchOperation implements AggregationOperation {
private final CriteriaDefinition criteriaDefinition;
/**
* Creates a new {@link MatchOperation} for the given {@link CriteriaDefinition}.
*
* @param criteriaDefinition must not be {@literal null}.
*/
public MatchOperation(CriteriaDefinition criteriaDefinition) {
Assert.notNull(criteriaDefinition, "Criteria must not be null!");
this.criteriaDefinition = criteriaDefinition;
}
/*
* (non-Javadoc)
* @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDocument(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
*/
@Override
public Document toDocument(AggregationOperationContext context) {
return new Document("$match", context.getMappedObject(criteriaDefinition.getCriteriaObject()));
}
}