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io.micronaut.jackson.databind.JacksonDatabindMapper Maven / Gradle / Ivy
/*
* Copyright 2017-2021 original 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 io.micronaut.jackson.databind;
import com.fasterxml.jackson.annotation.JsonView;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;
import com.fasterxml.jackson.databind.ObjectWriter;
import io.micronaut.context.annotation.BootstrapContextCompatible;
import io.micronaut.core.annotation.AnnotationMetadata;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.core.annotation.Nullable;
import io.micronaut.core.io.buffer.ByteBuffer;
import io.micronaut.core.reflect.InstantiationUtils;
import io.micronaut.core.type.Argument;
import io.micronaut.jackson.JacksonConfiguration;
import io.micronaut.jackson.ObjectMapperFactory;
import io.micronaut.jackson.codec.JacksonFeatures;
import io.micronaut.jackson.core.parser.JacksonCoreParserFactory;
import io.micronaut.jackson.core.parser.JacksonCoreProcessor;
import io.micronaut.jackson.core.tree.JsonNodeTreeCodec;
import io.micronaut.jackson.core.tree.TreeGenerator;
import io.micronaut.jackson.serialize.JsonNodeDeserializer;
import io.micronaut.jackson.serialize.JsonNodeSerializer;
import io.micronaut.json.JsonFeatures;
import io.micronaut.json.JsonMapper;
import io.micronaut.json.JsonStreamConfig;
import io.micronaut.json.JsonSyntaxException;
import io.micronaut.json.tree.JsonNode;
import jakarta.inject.Inject;
import jakarta.inject.Singleton;
import org.reactivestreams.Processor;
import org.reactivestreams.Subscriber;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Optional;
import java.util.function.Consumer;
/**
* jackson-databind implementation of {@link JsonMapper}.
*
* @author Jonas Konrad
* @since 3.1
*/
@Internal
@Singleton
@BootstrapContextCompatible
public final class JacksonDatabindMapper implements JsonMapper {
private final ObjectMapper objectMapper;
private final JsonStreamConfig config;
private final JsonNodeTreeCodec treeCodec;
private final ObjectReader specializedReader;
private final ObjectWriter specializedWriter;
private TypeCache cachedReader;
private TypeCache cachedWriter;
@Inject
@Internal
public JacksonDatabindMapper(ObjectMapper objectMapper) {
this.objectMapper = objectMapper;
this.config = JsonStreamConfig.DEFAULT
.withUseBigDecimalForFloats(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.USE_BIG_DECIMAL_FOR_FLOATS))
.withUseBigIntegerForInts(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.USE_BIG_INTEGER_FOR_INTS));
this.treeCodec = JsonNodeTreeCodec.getInstance().withConfig(config);
this.specializedReader = null;
this.specializedWriter = null;
}
@Internal
public JacksonDatabindMapper() {
this(createDefaultMapper());
}
private JacksonDatabindMapper(JacksonDatabindMapper from, Argument type) {
this.objectMapper = from.objectMapper;
this.config = from.config;
this.treeCodec = from.treeCodec;
this.specializedReader = from.createReader(type);
this.specializedWriter = from.createWriter(type);
}
private static ObjectMapper createDefaultMapper() {
ObjectMapperFactory objectMapperFactory = new ObjectMapperFactory();
objectMapperFactory.setDeserializers(new JsonNodeDeserializer());
objectMapperFactory.setSerializers(new JsonNodeSerializer());
return objectMapperFactory.objectMapper(null, null);
}
@Internal
public ObjectMapper getObjectMapper() {
return objectMapper;
}
@Override
public JsonMapper createSpecific(Argument type) {
return new JacksonDatabindMapper(this, type);
}
private ObjectReader createReader(@NonNull Argument type) {
if (specializedReader != null) {
return specializedReader;
}
TypeCache cachedReader = this.cachedReader;
if (cachedReader != null && cachedReader.type == type) {
return cachedReader.cachedValue;
}
ObjectReader reader = objectMapper.readerFor(JacksonConfiguration.constructType(type, objectMapper.getTypeFactory()));
@SuppressWarnings("rawtypes")
Optional view = type.getAnnotationMetadata().classValue(JsonView.class);
if (view.isPresent()) {
reader = reader.withView(view.get());
}
this.cachedReader = new TypeCache<>(type, reader);
return reader;
}
private ObjectWriter createWriter(@NonNull Argument type) {
if (specializedWriter != null) {
return specializedWriter;
}
TypeCache cachedWriter = this.cachedWriter;
if (cachedWriter != null && cachedWriter.type == type) {
return cachedWriter.cachedValue;
}
ObjectWriter writer = objectMapper.writerFor(JacksonConfiguration.constructType(type, objectMapper.getTypeFactory()));
@SuppressWarnings("rawtypes")
Optional view = type.getAnnotationMetadata().classValue(JsonView.class);
if (view.isPresent()) {
writer = writer.withView(view.get());
}
this.cachedWriter = new TypeCache<>(type, writer);
return writer;
}
@Override
public T readValueFromTree(@NonNull JsonNode tree, @NonNull Argument type) throws IOException {
return createReader(type).readValue(treeAsTokens(tree));
}
@Override
public @NonNull JsonNode writeValueToTree(@Nullable Object value) throws IOException {
TreeGenerator treeGenerator = treeCodec.createTreeGenerator();
treeGenerator.setCodec(objectMapper);
objectMapper.writeValue(treeGenerator, value);
return treeGenerator.getCompletedValue();
}
@NonNull
@Override
public JsonNode writeValueToTree(@NonNull Argument type, T value) throws IOException {
TreeGenerator treeGenerator = treeCodec.createTreeGenerator();
treeGenerator.setCodec(objectMapper);
createWriter(type).writeValue(treeGenerator, value);
return treeGenerator.getCompletedValue();
}
@Override
public T readValue(@NonNull InputStream inputStream, @NonNull Argument type) throws IOException {
try {
return createReader(type).readValue(inputStream);
} catch (JsonParseException pe) {
throw new JsonSyntaxException(pe);
}
}
@Override
public T readValue(@NonNull byte[] byteArray, @NonNull Argument type) throws IOException {
try {
return createReader(type).readValue(byteArray);
} catch (JsonParseException pe) {
throw new JsonSyntaxException(pe);
}
}
@Override
public T readValue(ByteBuffer byteBuffer, Argument type) throws IOException {
try (JsonParser parser = JacksonCoreParserFactory.createJsonParser(objectMapper.getFactory(), byteBuffer)) {
return createReader(type).readValue(parser);
} catch (JsonParseException pe) {
throw new JsonSyntaxException(pe);
}
}
@Override
public void writeValue(@NonNull OutputStream outputStream, @Nullable Object object) throws IOException {
objectMapper.writeValue(outputStream, object);
}
@Override
public void writeValue(@NonNull OutputStream outputStream, @NonNull Argument type, T object) throws IOException {
createWriter(type).writeValue(outputStream, object);
}
@Override
public byte[] writeValueAsBytes(@Nullable Object object) throws IOException {
return objectMapper.writeValueAsBytes(object);
}
@Override
public byte[] writeValueAsBytes(@NonNull Argument type, T object) throws IOException {
return createWriter(type).writeValueAsBytes(object);
}
@Override
public void updateValueFromTree(Object value, @NonNull JsonNode tree) throws IOException {
objectMapper.readerForUpdating(value).readValue(treeAsTokens(tree));
}
@Override
public @NonNull JsonMapper cloneWithFeatures(@NonNull JsonFeatures features) {
JacksonFeatures jacksonFeatures = (JacksonFeatures) features;
ObjectMapper objectMapper = this.objectMapper.copy();
jacksonFeatures.getDeserializationFeatures().forEach(objectMapper::configure);
jacksonFeatures.getSerializationFeatures().forEach(objectMapper::configure);
for (Class moduleClass : jacksonFeatures.getAdditionalModules()) {
objectMapper.registerModule(InstantiationUtils.instantiate(moduleClass));
}
return new JacksonDatabindMapper(objectMapper);
}
@NonNull
@Override
public JsonMapper cloneWithViewClass(@NonNull Class viewClass) {
ObjectMapper objectMapper = this.objectMapper.copy();
objectMapper.setConfig(objectMapper.getSerializationConfig().withView(viewClass));
objectMapper.setConfig(objectMapper.getDeserializationConfig().withView(viewClass));
return new JacksonDatabindMapper(objectMapper);
}
@NonNull
@Override
public JsonStreamConfig getStreamConfig() {
return config;
}
@Override
public @NonNull Processor createReactiveParser(@NonNull Consumer> onSubscribe, boolean streamArray) {
return new JacksonCoreProcessor(streamArray, objectMapper.getFactory(), config) {
@Override
public void subscribe(Subscriber downstreamSubscriber) {
onSubscribe.accept(this);
super.subscribe(downstreamSubscriber);
}
};
}
@NonNull
@Override
public Optional detectFeatures(@NonNull AnnotationMetadata annotations) {
return Optional.ofNullable(annotations.getAnnotation(io.micronaut.jackson.annotation.JacksonFeatures.class))
.map(JacksonFeatures::fromAnnotation);
}
private JsonParser treeAsTokens(@NonNull JsonNode tree) {
JsonParser parser = treeCodec.treeAsTokens(tree);
parser.setCodec(objectMapper);
return parser;
}
private record TypeCache(Argument type, T cachedValue) {
}
}
