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christophstroblmp911de
christophstrobl
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mp911de
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Delegate Bson conversion to MongoDB Codec.
Instead of reimplementing conversion we now try to delegate to the native MongoDB codec infrastructure using a custom writer that will only capture values without actually pushing values to an output stream. See #4432 Original pull request: #4439
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‎spring-data-mongodb/src/main/java/org/springframework/data/mongodb/util/BsonUtils.java‎

Lines changed: 199 additions & 27 deletions
Original file line numberDiff line numberDiff line change
@@ -15,32 +15,33 @@
1515
*/
1616
package org.springframework.data.mongodb.util;
1717

18-
import java.time.Instant;
19-
import java.time.LocalDate;
20-
import java.time.LocalDateTime;
21-
import java.time.LocalTime;
22-
import java.time.ZoneOffset;
23-
import java.time.temporal.Temporal;
18+
import java.util.ArrayList;
2419
import java.util.Arrays;
2520
import java.util.Collection;
2621
import java.util.Collections;
2722
import java.util.Date;
23+
import java.util.List;
2824
import java.util.Map;
2925
import java.util.StringJoiner;
3026
import java.util.function.Function;
3127
import java.util.stream.StreamSupport;
3228

3329
import org.bson.*;
30+
import org.bson.codecs.Codec;
3431
import org.bson.codecs.DocumentCodec;
32+
import org.bson.codecs.EncoderContext;
33+
import org.bson.codecs.configuration.CodecConfigurationException;
3534
import org.bson.codecs.configuration.CodecRegistry;
3635
import org.bson.conversions.Bson;
3736
import org.bson.json.JsonParseException;
3837
import org.bson.types.Binary;
38+
import org.bson.types.Decimal128;
3939
import org.bson.types.ObjectId;
4040
import org.springframework.core.convert.converter.Converter;
4141
import org.springframework.data.mongodb.CodecRegistryProvider;
4242
import org.springframework.lang.Nullable;
4343
import org.springframework.util.Assert;
44+
import org.springframework.util.ClassUtils;
4445
import org.springframework.util.CollectionUtils;
4546
import org.springframework.util.ObjectUtils;
4647
import org.springframework.util.StringUtils;
@@ -109,7 +110,7 @@ public static Map<String, Object> asMap(@Nullable Bson bson, CodecRegistry codec
109110
return dbo.toMap();
110111
}
111112

112-
return new Document((Map) bson.toBsonDocument(Document.class, codecRegistry));
113+
return new Document(bson.toBsonDocument(Document.class, codecRegistry));
113114
}
114115

115116
/**
@@ -327,6 +328,20 @@ public static Object toJavaType(BsonValue value) {
327328
* @since 3.0
328329
*/
329330
public static BsonValue simpleToBsonValue(Object source) {
331+
return simpleToBsonValue(source, MongoClientSettings.getDefaultCodecRegistry());
332+
}
333+
334+
/**
335+
* Convert a given simple value (eg. {@link String}, {@link Long}) to its corresponding {@link BsonValue}.
336+
*
337+
* @param source must not be {@literal null}.
338+
* @param codecRegistry The {@link CodecRegistry} used as a fallback to convert types using native {@link Codec}. Must
339+
* not be {@literal null}.
340+
* @return the corresponding {@link BsonValue} representation.
341+
* @throws IllegalArgumentException if {@literal source} does not correspond to a {@link BsonValue} type.
342+
* @since 4.2
343+
*/
344+
public static BsonValue simpleToBsonValue(Object source, CodecRegistry codecRegistry) {
330345

331346
if (source instanceof BsonValue bsonValue) {
332347
return bsonValue;
@@ -364,31 +379,30 @@ public static BsonValue simpleToBsonValue(Object source) {
364379
return new BsonDouble(floatValue);
365380
}
366381

367-
if(source instanceof Binary binary) {
382+
if (source instanceof Binary binary) {
368383
return new BsonBinary(binary.getType(), binary.getData());
369384
}
370385

371-
if(source instanceof Temporal) {
372-
if (source instanceof Instant value) {
373-
return new BsonDateTime(value.toEpochMilli());
374-
}
375-
if (source instanceof LocalDateTime value) {
376-
return new BsonDateTime(value.toInstant(ZoneOffset.UTC).toEpochMilli());
377-
}
378-
if(source instanceof LocalDate value) {
379-
return new BsonDateTime(value.atStartOfDay(ZoneOffset.UTC).toInstant().toEpochMilli());
380-
}
381-
if(source instanceof LocalTime value) {
382-
return new BsonDateTime(value.atDate(LocalDate.ofEpochDay(0L)).toInstant(ZoneOffset.UTC).toEpochMilli());
383-
}
384-
}
385-
386-
if(source instanceof Date date) {
386+
if (source instanceof Date date) {
387387
new BsonDateTime(date.getTime());
388388
}
389389

390-
throw new IllegalArgumentException(String.format("Unable to convert %s (%s) to BsonValue.", source,
391-
source != null ? source.getClass().getName() : "null"));
390+
try {
391+
392+
Object value = source;
393+
if (ClassUtils.isPrimitiveArray(source.getClass())) {
394+
value = CollectionUtils.arrayToList(source);
395+
}
396+
397+
Codec codec = codecRegistry.get(value.getClass());
398+
BsonCapturingWriter writer = new BsonCapturingWriter(value.getClass());
399+
codec.encode(writer, value,
400+
ObjectUtils.isArray(value) || value instanceof Collection<?> ? EncoderContext.builder().build() : null);
401+
return writer.getCapturedValue();
402+
} catch (CodecConfigurationException e) {
403+
throw new IllegalArgumentException(
404+
String.format("Unable to convert %s to BsonValue.", source != null ? source.getClass().getName() : "null"));
405+
}
392406
}
393407

394408
/**
@@ -694,7 +708,7 @@ private static String toJson(@Nullable Object value) {
694708

695709
if (value instanceof Collection<?> collection) {
696710
return toString(collection);
697-
} else if (value instanceof Map<?,?> map) {
711+
} else if (value instanceof Map<?, ?> map) {
698712
return toString(map);
699713
} else if (ObjectUtils.isArray(value)) {
700714
return toString(Arrays.asList(ObjectUtils.toObjectArray(value)));
@@ -733,4 +747,162 @@ private static <T> String iterableToDelimitedString(Iterable<T> source, String p
733747

734748
return joiner.toString();
735749
}
750+
751+
private static class BsonCapturingWriter extends AbstractBsonWriter {
752+
753+
List<BsonValue> values = new ArrayList<>(0);
754+
755+
public BsonCapturingWriter(Class<?> type) {
756+
super(new BsonWriterSettings());
757+
if (ClassUtils.isAssignable(Map.class, type)) {
758+
setContext(new Context(null, BsonContextType.DOCUMENT));
759+
} else if (ClassUtils.isAssignable(List.class, type) || type.isArray()) {
760+
setContext(new Context(null, BsonContextType.ARRAY));
761+
} else {
762+
setContext(new Context(null, BsonContextType.DOCUMENT));
763+
}
764+
}
765+
766+
BsonValue getCapturedValue() {
767+
768+
if (values.isEmpty()) {
769+
return null;
770+
}
771+
if (!getContext().getContextType().equals(BsonContextType.ARRAY)) {
772+
return values.get(0);
773+
}
774+
775+
return new BsonArray(values);
776+
}
777+
778+
@Override
779+
protected void doWriteStartDocument() {
780+
781+
}
782+
783+
@Override
784+
protected void doWriteEndDocument() {
785+
786+
}
787+
788+
@Override
789+
public void writeStartArray() {
790+
setState(State.VALUE);
791+
}
792+
793+
@Override
794+
public void writeEndArray() {
795+
setState(State.NAME);
796+
}
797+
798+
@Override
799+
protected void doWriteStartArray() {
800+
801+
}
802+
803+
@Override
804+
protected void doWriteEndArray() {
805+
806+
}
807+
808+
@Override
809+
protected void doWriteBinaryData(BsonBinary value) {
810+
values.add(value);
811+
}
812+
813+
@Override
814+
protected void doWriteBoolean(boolean value) {
815+
values.add(BsonBoolean.valueOf(value));
816+
}
817+
818+
@Override
819+
protected void doWriteDateTime(long value) {
820+
values.add(new BsonDateTime(value));
821+
}
822+
823+
@Override
824+
protected void doWriteDBPointer(BsonDbPointer value) {
825+
values.add(value);
826+
}
827+
828+
@Override
829+
protected void doWriteDouble(double value) {
830+
values.add(new BsonDouble(value));
831+
}
832+
833+
@Override
834+
protected void doWriteInt32(int value) {
835+
values.add(new BsonInt32(value));
836+
}
837+
838+
@Override
839+
protected void doWriteInt64(long value) {
840+
values.add(new BsonInt64(value));
841+
}
842+
843+
@Override
844+
protected void doWriteDecimal128(Decimal128 value) {
845+
values.add(new BsonDecimal128(value));
846+
}
847+
848+
@Override
849+
protected void doWriteJavaScript(String value) {
850+
values.add(new BsonJavaScript(value));
851+
}
852+
853+
@Override
854+
protected void doWriteJavaScriptWithScope(String value) {
855+
values.add(new BsonJavaScriptWithScope(value, null));
856+
}
857+
858+
@Override
859+
protected void doWriteMaxKey() {
860+
861+
}
862+
863+
@Override
864+
protected void doWriteMinKey() {
865+
866+
}
867+
868+
@Override
869+
protected void doWriteNull() {
870+
values.add(new BsonNull());
871+
}
872+
873+
@Override
874+
protected void doWriteObjectId(ObjectId value) {
875+
values.add(new BsonObjectId(value));
876+
}
877+
878+
@Override
879+
protected void doWriteRegularExpression(BsonRegularExpression value) {
880+
values.add(value);
881+
}
882+
883+
@Override
884+
protected void doWriteString(String value) {
885+
values.add(new BsonString(value));
886+
}
887+
888+
@Override
889+
protected void doWriteSymbol(String value) {
890+
values.add(new BsonSymbol(value));
891+
}
892+
893+
@Override
894+
protected void doWriteTimestamp(BsonTimestamp value) {
895+
values.add(value);
896+
}
897+
898+
@Override
899+
protected void doWriteUndefined() {
900+
values.add(new BsonUndefined());
901+
}
902+
903+
@Override
904+
public void flush() {
905+
values.clear();
906+
}
907+
}
736908
}

‎spring-data-mongodb/src/test/java/org/springframework/data/mongodb/util/json/BsonUtilsTest.java‎

Lines changed: 52 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -17,10 +17,19 @@
1717

1818
import static org.assertj.core.api.Assertions.*;
1919

20+
import java.time.Instant;
21+
import java.time.LocalDate;
22+
import java.time.LocalDateTime;
23+
import java.time.LocalTime;
24+
import java.time.temporal.Temporal;
2025
import java.util.ArrayList;
2126
import java.util.Collection;
2227
import java.util.Collections;
28+
import java.util.Date;
29+
import java.util.List;
30+
import java.util.stream.Stream;
2331

32+
import org.bson.BsonArray;
2433
import org.bson.BsonDouble;
2534
import org.bson.BsonInt32;
2635
import org.bson.BsonInt64;
@@ -29,7 +38,9 @@
2938
import org.bson.Document;
3039
import org.bson.types.ObjectId;
3140
import org.junit.jupiter.api.Test;
32-
41+
import org.junit.jupiter.params.ParameterizedTest;
42+
import org.junit.jupiter.params.provider.Arguments;
43+
import org.junit.jupiter.params.provider.MethodSource;
3344
import org.springframework.data.mongodb.util.BsonUtils;
3445

3546
import com.mongodb.BasicDBList;
@@ -105,17 +116,17 @@ void asCollectionDoesNotModifyCollection() {
105116
@Test // GH-3571
106117
void asCollectionConvertsArrayToCollection() {
107118

108-
Object source = new String[]{"one", "two"};
119+
Object source = new String[] { "one", "two" };
109120

110-
assertThat((Collection)BsonUtils.asCollection(source)).containsExactly("one", "two");
121+
assertThat((Collection) BsonUtils.asCollection(source)).containsExactly("one", "two");
111122
}
112123

113124
@Test // GH-3571
114125
void asCollectionConvertsWrapsNonIterable() {
115126

116127
Object source = 100L;
117128

118-
assertThat((Collection)BsonUtils.asCollection(source)).containsExactly(source);
129+
assertThat((Collection) BsonUtils.asCollection(source)).containsExactly(source);
119130
}
120131

121132
@Test // GH-3702
@@ -126,4 +137,41 @@ void supportsBsonShouldReportIfConversionSupported() {
126137
assertThat(BsonUtils.supportsBson(new BasicDBList())).isTrue();
127138
assertThat(BsonUtils.supportsBson(Collections.emptyMap())).isTrue();
128139
}
140+
141+
@ParameterizedTest // GH-4432
142+
@MethodSource("javaTimeInstances")
143+
void convertsJavaTimeTypesToBsonDateTime(Temporal source) {
144+
145+
assertThat(BsonUtils.simpleToBsonValue(source))
146+
.isEqualTo(new Document("value", source).toBsonDocument().get("value"));
147+
}
148+
149+
@ParameterizedTest // GH-4432
150+
@MethodSource("collectionLikeInstances")
151+
void convertsCollectionLikeToBsonArray(Object source) {
152+
153+
assertThat(BsonUtils.simpleToBsonValue(source))
154+
.isEqualTo(new Document("value", source).toBsonDocument().get("value"));
155+
}
156+
157+
@Test // GH-4432
158+
void convertsPrimitiveArrayToBsonArray() {
159+
160+
assertThat(BsonUtils.simpleToBsonValue(new int[] { 1, 2, 3 }))
161+
.isEqualTo(new BsonArray(List.of(new BsonInt32(1), new BsonInt32(2), new BsonInt32(3))));
162+
}
163+
164+
static Stream<Arguments> javaTimeInstances() {
165+
166+
return Stream.of(Arguments.of(Instant.now()), Arguments.of(LocalDate.now()), Arguments.of(LocalDateTime.now()),
167+
Arguments.of(LocalTime.now()));
168+
}
169+
170+
static Stream<Arguments> collectionLikeInstances() {
171+
172+
return Stream.of(Arguments.of(new String[] { "1", "2", "3" }), Arguments.of(List.of("1", "2", "3")),
173+
Arguments.of(new Integer[] { 1, 2, 3 }), Arguments.of(List.of(1, 2, 3)),
174+
Arguments.of(new Date[] { new Date() }), Arguments.of(List.of(new Date())),
175+
Arguments.of(new LocalDate[] { LocalDate.now() }), Arguments.of(List.of(LocalDate.now())));
176+
}
129177
}

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