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Introduce Aggregation.stage which allows to use a plain JSON String or any valid Bson representation to be used within an aggregation pipeline stage, without having to implement AggregationOperation directly. The change allows to make use of driver native builder API for aggregates. Original pull request: #4059. Closes #4038pull/4093/head
Christoph Strobl
4 years ago
committed by
Mark Paluch
15 changed files with 340 additions and 22 deletions
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/* |
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* Copyright 2022 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* https://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.data.mongodb.core.aggregation; |
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import java.util.Map; |
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import org.bson.Document; |
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import org.bson.conversions.Bson; |
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import org.springframework.data.mongodb.util.BsonUtils; |
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import org.springframework.util.ObjectUtils; |
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/** |
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* {@link AggregationOperation} implementation that c |
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* |
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* @author Christoph Strobl |
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* @since 4.0 |
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*/ |
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class BasicAggregationOperation implements AggregationOperation { |
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private final Object value; |
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BasicAggregationOperation(Object value) { |
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this.value = value; |
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} |
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@Override |
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public Document toDocument(AggregationOperationContext context) { |
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if (value instanceof Document document) { |
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return document; |
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} |
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if (value instanceof Bson bson) { |
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return BsonUtils.asDocument(bson, context.getCodecRegistry()); |
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} |
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if (value instanceof Map map) { |
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return new Document(map); |
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} |
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if (value instanceof String json && BsonUtils.isJsonDocument(json)) { |
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return BsonUtils.parse(json, context); |
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} |
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throw new IllegalStateException( |
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String.format("%s cannot be converted to org.bson.Document.", ObjectUtils.nullSafeClassName(value))); |
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} |
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} |
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/* |
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* Copyright 2022 the original author or authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* https://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.springframework.data.mongodb.core.aggregation; |
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import static org.assertj.core.api.Assertions.*; |
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import static org.mockito.Mockito.*; |
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import org.bson.Document; |
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import org.junit.jupiter.api.BeforeEach; |
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import org.junit.jupiter.api.Test; |
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import org.junit.jupiter.api.extension.ExtendWith; |
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import org.mockito.Mock; |
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import org.mockito.junit.jupiter.MockitoExtension; |
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import org.mockito.junit.jupiter.MockitoSettings; |
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import org.mockito.quality.Strictness; |
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import org.springframework.data.mongodb.core.convert.MongoConverter; |
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import org.springframework.data.mongodb.core.convert.QueryMapper; |
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import org.springframework.data.mongodb.core.mapping.Field; |
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import org.springframework.data.mongodb.core.mapping.MongoMappingContext; |
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import com.mongodb.MongoClientSettings; |
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/** |
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* @author Christoph Strobl |
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*/ |
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@ExtendWith(MockitoExtension.class) |
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@MockitoSettings(strictness = Strictness.LENIENT) |
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class BasicAggregationOperationUnitTests { |
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@Mock QueryMapper queryMapper; |
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@Mock MongoConverter converter; |
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TypeBasedAggregationOperationContext ctx; |
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@BeforeEach |
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void beforeEach() { |
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// no field mapping though having a type based context
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ctx = new TypeBasedAggregationOperationContext(Person.class, new MongoMappingContext(), queryMapper); |
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when(queryMapper.getConverter()).thenReturn(converter); |
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when(converter.getCodecRegistry()).thenReturn(MongoClientSettings.getDefaultCodecRegistry()); |
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} |
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@Test // GH-4038
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void usesGivenDocumentAsIs() { |
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Document source = new Document("value", 1); |
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assertThat(new BasicAggregationOperation(source).toDocument(ctx)).isSameAs(source); |
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} |
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@Test // GH-4038
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void parsesJson() { |
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Document source = new Document("value", 1); |
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assertThat(new BasicAggregationOperation(source.toJson()).toDocument(ctx)).isEqualTo(source); |
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} |
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@Test // GH-4038
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void errorsOnInvalidValue() { |
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BasicAggregationOperation agg = new BasicAggregationOperation(new Object()); |
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assertThatExceptionOfType(IllegalStateException.class).isThrownBy(() -> agg.toDocument(ctx)); |
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} |
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@Test // GH-4038
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void errorsOnNonJsonSting() { |
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BasicAggregationOperation agg = new BasicAggregationOperation("#005BBB #FFD500"); |
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assertThatExceptionOfType(IllegalStateException.class).isThrownBy(() -> agg.toDocument(ctx)); |
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} |
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private static class Person { |
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@Field("v-a-l-u-e") Object value; |
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} |
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} |
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