spring Jackson2ObjectMapperBuilder 源码
spring Jackson2ObjectMapperBuilder 代码
文件路径：/spring-web/src/main/java/org/springframework/http/converter/json/Jackson2ObjectMapperBuilder.java
/*
* Copyright 2002-2022 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.http.converter.json;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.TimeZone;
import java.util.function.Consumer;
import java.util.function.Function;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonFilter;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.AnnotationIntrospector;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.KeyDeserializer;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.cfg.HandlerInstantiator;
import com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair;
import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.FilterProvider;
import com.fasterxml.jackson.dataformat.cbor.CBORFactory;
import com.fasterxml.jackson.dataformat.smile.SmileFactory;
import com.fasterxml.jackson.dataformat.xml.JacksonXmlModule;
import com.fasterxml.jackson.dataformat.xml.XmlFactory;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.FatalBeanException;
import org.springframework.context.ApplicationContext;
import org.springframework.core.KotlinDetector;
import org.springframework.http.ProblemDetail;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.util.StringUtils;
import org.springframework.util.xml.StaxUtils;
/**
* A builder used to create {@link ObjectMapper} instances with a fluent API.
*
* <p>It customizes Jackson's default properties with the following ones:
* <ul>
* <li>{@link MapperFeature#DEFAULT_VIEW_INCLUSION} is disabled</li>
* <li>{@link DeserializationFeature#FAIL_ON_UNKNOWN_PROPERTIES} is disabled</li>
* </ul>
*
* <p>It also automatically registers the following well-known modules if they are
* detected on the classpath:
* <ul>
* <li><a href="https://github.com/FasterXML/jackson-datatype-jdk8">jackson-datatype-jdk8</a>:
* support for other Java 8 types like {@link java.util.Optional}</li>
* <li><a href="https://github.com/FasterXML/jackson-datatype-jsr310">jackson-datatype-jsr310</a>:
* support for Java 8 Date & Time API types</li>
* <li><a href="https://github.com/FasterXML/jackson-module-kotlin">jackson-module-kotlin</a>:
* support for Kotlin classes and data classes</li>
* </ul>
*
* <p>Compatible with Jackson 2.9 to 2.12, as of Spring 5.3.
*
* @author Sebastien Deleuze
* @author Juergen Hoeller
* @author Tadaya Tsuyukubo
* @author Eddú Meléndez
* @since 4.1.1
* @see #build()
* @see #configure(ObjectMapper)
* @see Jackson2ObjectMapperFactoryBean
*/
public class Jackson2ObjectMapperBuilder {
private final Map<Class<?>, Class<?>> mixIns = new LinkedHashMap<>();
private final Map<Class<?>, JsonSerializer<?>> serializers = new LinkedHashMap<>();
private final Map<Class<?>, JsonDeserializer<?>> deserializers = new LinkedHashMap<>();
private final Map<PropertyAccessor, JsonAutoDetect.Visibility> visibilities = new LinkedHashMap<>();
private final Map<Object, Boolean> features = new LinkedHashMap<>();
private boolean createXmlMapper = false;
@Nullable
private JsonFactory factory;
@Nullable
private DateFormat dateFormat;
@Nullable
private Locale locale;
@Nullable
private TimeZone timeZone;
@Nullable
private AnnotationIntrospector annotationIntrospector;
@Nullable
private PropertyNamingStrategy propertyNamingStrategy;
@Nullable
private TypeResolverBuilder<?> defaultTyping;
@Nullable
private JsonInclude.Value serializationInclusion;
@Nullable
private FilterProvider filters;
@Nullable
private List<Module> modules;
@Nullable
private Class<? extends Module>[] moduleClasses;
private boolean findModulesViaServiceLoader = false;
private boolean findWellKnownModules = true;
private ClassLoader moduleClassLoader = getClass().getClassLoader();
@Nullable
private HandlerInstantiator handlerInstantiator;
@Nullable
private ApplicationContext applicationContext;
@Nullable
private Boolean defaultUseWrapper;
@Nullable
private Consumer<ObjectMapper> configurer;
/**
* If set to {@code true}, an {@link XmlMapper} will be created using its
* default constructor. This is only applicable to {@link #build()} calls,
* not to {@link #configure} calls.
*/
public Jackson2ObjectMapperBuilder createXmlMapper(boolean createXmlMapper) {
this.createXmlMapper = createXmlMapper;
return this;
}
/**
* Define the {@link JsonFactory} to be used to create the {@link ObjectMapper}
* instance.
* @since 5.0
*/
public Jackson2ObjectMapperBuilder factory(JsonFactory factory) {
this.factory = factory;
return this;
}
/**
* Define the format for date/time with the given {@link DateFormat}.
* <p>Note: Setting this property makes the exposed {@link ObjectMapper}
* non-thread-safe, according to Jackson's thread safety rules.
* @see #simpleDateFormat(String)
*/
public Jackson2ObjectMapperBuilder dateFormat(DateFormat dateFormat) {
this.dateFormat = dateFormat;
return this;
}
/**
* Define the date/time format with a {@link SimpleDateFormat}.
* <p>Note: Setting this property makes the exposed {@link ObjectMapper}
* non-thread-safe, according to Jackson's thread safety rules.
* @see #dateFormat(DateFormat)
*/
public Jackson2ObjectMapperBuilder simpleDateFormat(String format) {
this.dateFormat = new SimpleDateFormat(format);
return this;
}
/**
* Override the default {@link Locale} to use for formatting.
* Default value used is {@link Locale#getDefault()}.
* @since 4.1.5
*/
public Jackson2ObjectMapperBuilder locale(Locale locale) {
this.locale = locale;
return this;
}
/**
* Override the default {@link Locale} to use for formatting.
* Default value used is {@link Locale#getDefault()}.
* @param localeString the locale ID as a String representation
* @since 4.1.5
*/
public Jackson2ObjectMapperBuilder locale(String localeString) {
this.locale = StringUtils.parseLocale(localeString);
return this;
}
/**
* Override the default {@link TimeZone} to use for formatting.
* Default value used is UTC (NOT local timezone).
* @since 4.1.5
*/
public Jackson2ObjectMapperBuilder timeZone(TimeZone timeZone) {
this.timeZone = timeZone;
return this;
}
/**
* Override the default {@link TimeZone} to use for formatting.
* Default value used is UTC (NOT local timezone).
* @param timeZoneString the zone ID as a String representation
* @since 4.1.5
*/
public Jackson2ObjectMapperBuilder timeZone(String timeZoneString) {
this.timeZone = StringUtils.parseTimeZoneString(timeZoneString);
return this;
}
/**
* Set an {@link AnnotationIntrospector} for both serialization and deserialization.
*/
public Jackson2ObjectMapperBuilder annotationIntrospector(AnnotationIntrospector annotationIntrospector) {
this.annotationIntrospector = annotationIntrospector;
return this;
}
/**
* Alternative to {@link #annotationIntrospector(AnnotationIntrospector)}
* that allows combining with rather than replacing the currently set
* introspector, e.g. via
* {@link AnnotationIntrospectorPair#pair(AnnotationIntrospector, AnnotationIntrospector)}.
* @param pairingFunction a function to apply to the currently set
* introspector (possibly {@code null}); the result of the function becomes
* the new introspector.
* @since 5.2.4
*/
public Jackson2ObjectMapperBuilder annotationIntrospector(
Function<AnnotationIntrospector, AnnotationIntrospector> pairingFunction) {
this.annotationIntrospector = pairingFunction.apply(this.annotationIntrospector);
return this;
}
/**
* Specify a {@link com.fasterxml.jackson.databind.PropertyNamingStrategy} to
* configure the {@link ObjectMapper} with.
*/
public Jackson2ObjectMapperBuilder propertyNamingStrategy(PropertyNamingStrategy propertyNamingStrategy) {
this.propertyNamingStrategy = propertyNamingStrategy;
return this;
}
/**
* Specify a {@link TypeResolverBuilder} to use for Jackson's default typing.
* @since 4.2.2
*/
public Jackson2ObjectMapperBuilder defaultTyping(TypeResolverBuilder<?> typeResolverBuilder) {
this.defaultTyping = typeResolverBuilder;
return this;
}
/**
* Set a custom inclusion strategy for serialization.
* @see com.fasterxml.jackson.annotation.JsonInclude.Include
*/
public Jackson2ObjectMapperBuilder serializationInclusion(JsonInclude.Include inclusion) {
return serializationInclusion(JsonInclude.Value.construct(inclusion, inclusion));
}
/**
* Set a custom inclusion strategy for serialization.
* @since 5.3
* @see com.fasterxml.jackson.annotation.JsonInclude.Value
*/
public Jackson2ObjectMapperBuilder serializationInclusion(JsonInclude.Value serializationInclusion) {
this.serializationInclusion = serializationInclusion;
return this;
}
/**
* Set the global filters to use in order to support {@link JsonFilter @JsonFilter} annotated POJO.
* @since 4.2
* @see MappingJacksonValue#setFilters(FilterProvider)
*/
public Jackson2ObjectMapperBuilder filters(FilterProvider filters) {
this.filters = filters;
return this;
}
/**
* Add mix-in annotations to use for augmenting specified class or interface.
* @param target class (or interface) whose annotations to effectively override
* @param mixinSource class (or interface) whose annotations are to be "added"
* to target's annotations as value
* @since 4.1.2
* @see com.fasterxml.jackson.databind.ObjectMapper#addMixIn(Class, Class)
*/
public Jackson2ObjectMapperBuilder mixIn(Class<?> target, Class<?> mixinSource) {
this.mixIns.put(target, mixinSource);
return this;
}
/**
* Add mix-in annotations to use for augmenting specified class or interface.
* @param mixIns a Map of entries with target classes (or interface) whose annotations
* to effectively override as key and mix-in classes (or interface) whose
* annotations are to be "added" to target's annotations as value.
* @since 4.1.2
* @see com.fasterxml.jackson.databind.ObjectMapper#addMixIn(Class, Class)
*/
public Jackson2ObjectMapperBuilder mixIns(Map<Class<?>, Class<?>> mixIns) {
this.mixIns.putAll(mixIns);
return this;
}
/**
* Configure custom serializers. Each serializer is registered for the type
* returned by {@link JsonSerializer#handledType()}, which must not be {@code null}.
* @see #serializersByType(Map)
*/
public Jackson2ObjectMapperBuilder serializers(JsonSerializer<?>... serializers) {
for (JsonSerializer<?> serializer : serializers) {
Class<?> handledType = serializer.handledType();
if (handledType == null || handledType == Object.class) {
throw new IllegalArgumentException("Unknown handled type in " + serializer.getClass().getName());
}
this.serializers.put(serializer.handledType(), serializer);
}
return this;
}
/**
* Configure a custom serializer for the given type.
* @since 4.1.2
* @see #serializers(JsonSerializer...)
*/
public Jackson2ObjectMapperBuilder serializerByType(Class<?> type, JsonSerializer<?> serializer) {
this.serializers.put(type, serializer);
return this;
}
/**
* Configure custom serializers for the given types.
* @see #serializers(JsonSerializer...)
*/
public Jackson2ObjectMapperBuilder serializersByType(Map<Class<?>, JsonSerializer<?>> serializers) {
this.serializers.putAll(serializers);
return this;
}
/**
* Configure custom deserializers. Each deserializer is registered for the type
* returned by {@link JsonDeserializer#handledType()}, which must not be {@code null}.
* @since 4.3
* @see #deserializersByType(Map)
*/
public Jackson2ObjectMapperBuilder deserializers(JsonDeserializer<?>... deserializers) {
for (JsonDeserializer<?> deserializer : deserializers) {
Class<?> handledType = deserializer.handledType();
if (handledType == null || handledType == Object.class) {
throw new IllegalArgumentException("Unknown handled type in " + deserializer.getClass().getName());
}
this.deserializers.put(deserializer.handledType(), deserializer);
}
return this;
}
/**
* Configure a custom deserializer for the given type.
* @since 4.1.2
*/
public Jackson2ObjectMapperBuilder deserializerByType(Class<?> type, JsonDeserializer<?> deserializer) {
this.deserializers.put(type, deserializer);
return this;
}
/**
* Configure custom deserializers for the given types.
*/
public Jackson2ObjectMapperBuilder deserializersByType(Map<Class<?>, JsonDeserializer<?>> deserializers) {
this.deserializers.putAll(deserializers);
return this;
}
/**
* Shortcut for {@link MapperFeature#AUTO_DETECT_FIELDS} option.
*/
public Jackson2ObjectMapperBuilder autoDetectFields(boolean autoDetectFields) {
this.features.put(MapperFeature.AUTO_DETECT_FIELDS, autoDetectFields);
return this;
}
/**
* Shortcut for {@link MapperFeature#AUTO_DETECT_SETTERS}/
* {@link MapperFeature#AUTO_DETECT_GETTERS}/{@link MapperFeature#AUTO_DETECT_IS_GETTERS}
* options.
*/
public Jackson2ObjectMapperBuilder autoDetectGettersSetters(boolean autoDetectGettersSetters) {
this.features.put(MapperFeature.AUTO_DETECT_GETTERS, autoDetectGettersSetters);
this.features.put(MapperFeature.AUTO_DETECT_SETTERS, autoDetectGettersSetters);
this.features.put(MapperFeature.AUTO_DETECT_IS_GETTERS, autoDetectGettersSetters);
return this;
}
/**
* Shortcut for {@link MapperFeature#DEFAULT_VIEW_INCLUSION} option.
*/
public Jackson2ObjectMapperBuilder defaultViewInclusion(boolean defaultViewInclusion) {
this.features.put(MapperFeature.DEFAULT_VIEW_INCLUSION, defaultViewInclusion);
return this;
}
/**
* Shortcut for {@link DeserializationFeature#FAIL_ON_UNKNOWN_PROPERTIES} option.
*/
public Jackson2ObjectMapperBuilder failOnUnknownProperties(boolean failOnUnknownProperties) {
this.features.put(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, failOnUnknownProperties);
return this;
}
/**
* Shortcut for {@link SerializationFeature#FAIL_ON_EMPTY_BEANS} option.
*/
public Jackson2ObjectMapperBuilder failOnEmptyBeans(boolean failOnEmptyBeans) {
this.features.put(SerializationFeature.FAIL_ON_EMPTY_BEANS, failOnEmptyBeans);
return this;
}
/**
* Shortcut for {@link SerializationFeature#INDENT_OUTPUT} option.
*/
public Jackson2ObjectMapperBuilder indentOutput(boolean indentOutput) {
this.features.put(SerializationFeature.INDENT_OUTPUT, indentOutput);
return this;
}
/**
* Define if a wrapper will be used for indexed (List, array) properties or not by
* default (only applies to {@link XmlMapper}).
* @since 4.3
*/
public Jackson2ObjectMapperBuilder defaultUseWrapper(boolean defaultUseWrapper) {
this.defaultUseWrapper = defaultUseWrapper;
return this;
}
/**
* Specify visibility to limit what kind of properties are auto-detected.
* @since 5.1
* @see com.fasterxml.jackson.annotation.PropertyAccessor
* @see com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility
*/
public Jackson2ObjectMapperBuilder visibility(PropertyAccessor accessor, JsonAutoDetect.Visibility visibility) {
this.visibilities.put(accessor, visibility);
return this;
}
/**
* Specify features to enable.
* @see com.fasterxml.jackson.core.JsonParser.Feature
* @see com.fasterxml.jackson.core.JsonGenerator.Feature
* @see com.fasterxml.jackson.databind.SerializationFeature
* @see com.fasterxml.jackson.databind.DeserializationFeature
* @see com.fasterxml.jackson.databind.MapperFeature
*/
public Jackson2ObjectMapperBuilder featuresToEnable(Object... featuresToEnable) {
for (Object feature : featuresToEnable) {
this.features.put(feature, Boolean.TRUE);
}
return this;
}
/**
* Specify features to disable.
* @see com.fasterxml.jackson.core.JsonParser.Feature
* @see com.fasterxml.jackson.core.JsonGenerator.Feature
* @see com.fasterxml.jackson.databind.SerializationFeature
* @see com.fasterxml.jackson.databind.DeserializationFeature
* @see com.fasterxml.jackson.databind.MapperFeature
*/
public Jackson2ObjectMapperBuilder featuresToDisable(Object... featuresToDisable) {
for (Object feature : featuresToDisable) {
this.features.put(feature, Boolean.FALSE);
}
return this;
}
/**
* Specify the modules to be registered with the {@link ObjectMapper}.
* <p>Multiple invocations are not additive, the last one defines the modules to
* register.
* <p>Note: If this is set, no finding of modules is going to happen - not by
* Jackson, and not by Spring either (see {@link #findModulesViaServiceLoader}).
* As a consequence, specifying an empty list here will suppress any kind of
* module detection.
* <p>Specify either this or {@link #modulesToInstall}, not both.
* @since 4.1.5
* @see #modules(List)
* @see com.fasterxml.jackson.databind.Module
*/
public Jackson2ObjectMapperBuilder modules(Module... modules) {
return modules(Arrays.asList(modules));
}
/**
* Variant of {@link #modules(Module...)} with a {@link List}.
* @see #modules(Module...)
* @see #modules(Consumer)
* @see com.fasterxml.jackson.databind.Module
*/
public Jackson2ObjectMapperBuilder modules(List<Module> modules) {
this.modules = new ArrayList<>(modules);
this.findModulesViaServiceLoader = false;
this.findWellKnownModules = false;
return this;
}
/**
* Variant of {@link #modules(Module...)} with a {@link Consumer} for full
* control over the underlying list of modules.
* @since 5.3.22
* @see #modules(Module...)
* @see #modules(List)
* @see com.fasterxml.jackson.databind.Module
*/
public Jackson2ObjectMapperBuilder modules(Consumer<List<Module>> consumer) {
this.modules = (this.modules != null ? this.modules : new ArrayList<>());
this.findModulesViaServiceLoader = false;
this.findWellKnownModules = false;
consumer.accept(this.modules);
return this;
}
/**
* Specify one or more modules to be registered with the {@link ObjectMapper}.
* <p>Multiple invocations are not additive, the last one defines the modules
* to register.
* <p>Modules specified here will be registered after
* Spring's autodetection of JSR-310 and Joda-Time, or Jackson's
* finding of modules (see {@link #findModulesViaServiceLoader}),
* allowing to eventually override their configuration.
* <p>Specify either this or {@link #modules(Module...)}, not both.
* @since 4.1.5
* @see #modulesToInstall(Consumer)
* @see #modulesToInstall(Class...)
* @see com.fasterxml.jackson.databind.Module
*/
public Jackson2ObjectMapperBuilder modulesToInstall(Module... modules) {
this.modules = Arrays.asList(modules);
this.findWellKnownModules = true;
return this;
}
/**
* Variant of {@link #modulesToInstall(Module...)} with a {@link Consumer}
* for full control over the underlying list of modules.
* @since 5.3.22
* @see #modulesToInstall(Module...)
* @see #modulesToInstall(Class...)
* @see com.fasterxml.jackson.databind.Module
*/
public Jackson2ObjectMapperBuilder modulesToInstall(Consumer<List<Module>> consumer) {
this.modules = (this.modules != null ? this.modules : new ArrayList<>());
this.findWellKnownModules = true;
consumer.accept(this.modules);
return this;
}
/**
* Specify one or more modules by class to be registered with
* the {@link ObjectMapper}.
* <p>Multiple invocations are not additive, the last one defines the modules
* to register.
* <p>Modules specified here will be registered after
* Spring's autodetection of JSR-310 and Joda-Time, or Jackson's
* finding of modules (see {@link #findModulesViaServiceLoader}),
* allowing to eventually override their configuration.
* <p>Specify either this or {@link #modules(Module...)}, not both.
* @see #modulesToInstall(Module...)
* @see #modulesToInstall(Consumer)
* @see com.fasterxml.jackson.databind.Module
*/
@SafeVarargs
@SuppressWarnings("varargs")
public final Jackson2ObjectMapperBuilder modulesToInstall(Class<? extends Module>... modules) {
this.moduleClasses = modules;
this.findWellKnownModules = true;
return this;
}
/**
* Set whether to let Jackson find available modules via the JDK ServiceLoader,
* based on META-INF metadata in the classpath.
* <p>If this mode is not set, Spring's Jackson2ObjectMapperBuilder itself
* will try to find the JSR-310 and Joda-Time support modules on the classpath -
* provided that Java 8 and Joda-Time themselves are available, respectively.
* @see com.fasterxml.jackson.databind.ObjectMapper#findModules()
*/
public Jackson2ObjectMapperBuilder findModulesViaServiceLoader(boolean findModules) {
this.findModulesViaServiceLoader = findModules;
return this;
}
/**
* Set the ClassLoader to use for loading Jackson extension modules.
*/
public Jackson2ObjectMapperBuilder moduleClassLoader(ClassLoader moduleClassLoader) {
this.moduleClassLoader = moduleClassLoader;
return this;
}
/**
* Customize the construction of Jackson handlers ({@link JsonSerializer}, {@link JsonDeserializer},
* {@link KeyDeserializer}, {@code TypeResolverBuilder} and {@code TypeIdResolver}).
* @since 4.1.3
* @see Jackson2ObjectMapperBuilder#applicationContext(ApplicationContext)
*/
public Jackson2ObjectMapperBuilder handlerInstantiator(HandlerInstantiator handlerInstantiator) {
this.handlerInstantiator = handlerInstantiator;
return this;
}
/**
* Set the Spring {@link ApplicationContext} in order to autowire Jackson handlers ({@link JsonSerializer},
* {@link JsonDeserializer}, {@link KeyDeserializer}, {@code TypeResolverBuilder} and {@code TypeIdResolver}).
* @since 4.1.3
* @see SpringHandlerInstantiator
*/
public Jackson2ObjectMapperBuilder applicationContext(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
return this;
}
/**
* An option to apply additional customizations directly to the
* {@code ObjectMapper} instances at the end, after all other config
* properties of the builder have been applied.
* @param configurer a configurer to apply. If several configurers are
* registered, they will get applied in their registration order.
* @since 5.3
*/
public Jackson2ObjectMapperBuilder postConfigurer(Consumer<ObjectMapper> configurer) {
this.configurer = (this.configurer != null ? this.configurer.andThen(configurer) : configurer);
return this;
}
/**
* Build a new {@link ObjectMapper} instance.
* <p>Each build operation produces an independent {@link ObjectMapper} instance.
* The builder's settings can get modified, with a subsequent build operation
* then producing a new {@link ObjectMapper} based on the most recent settings.
* @return the newly built ObjectMapper
*/
@SuppressWarnings("unchecked")
public <T extends ObjectMapper> T build() {
ObjectMapper mapper;
if (this.createXmlMapper) {
mapper = (this.defaultUseWrapper != null ?
new XmlObjectMapperInitializer().create(this.defaultUseWrapper, this.factory) :
new XmlObjectMapperInitializer().create(this.factory));
}
else {
mapper = (this.factory != null ? new ObjectMapper(this.factory) : new ObjectMapper());
}
configure(mapper);
return (T) mapper;
}
/**
* Configure an existing {@link ObjectMapper} instance with this builder's
* settings. This can be applied to any number of {@code ObjectMappers}.
* @param objectMapper the ObjectMapper to configure
*/
public void configure(ObjectMapper objectMapper) {
Assert.notNull(objectMapper, "ObjectMapper must not be null");
MultiValueMap<Object, Module> modulesToRegister = new LinkedMultiValueMap<>();
if (this.findModulesViaServiceLoader) {
ObjectMapper.findModules(this.moduleClassLoader).forEach(module -> registerModule(module, modulesToRegister));
}
else if (this.findWellKnownModules) {
registerWellKnownModulesIfAvailable(modulesToRegister);
}
if (this.modules != null) {
this.modules.forEach(module -> registerModule(module, modulesToRegister));
}
if (this.moduleClasses != null) {
for (Class<? extends Module> moduleClass : this.moduleClasses) {
registerModule(BeanUtils.instantiateClass(moduleClass), modulesToRegister);
}
}
List<Module> modules = new ArrayList<>();
for (List<Module> nestedModules : modulesToRegister.values()) {
modules.addAll(nestedModules);
}
objectMapper.registerModules(modules);
if (this.dateFormat != null) {
objectMapper.setDateFormat(this.dateFormat);
}
if (this.locale != null) {
objectMapper.setLocale(this.locale);
}
if (this.timeZone != null) {
objectMapper.setTimeZone(this.timeZone);
}
if (this.annotationIntrospector != null) {
objectMapper.setAnnotationIntrospector(this.annotationIntrospector);
}
if (this.propertyNamingStrategy != null) {
objectMapper.setPropertyNamingStrategy(this.propertyNamingStrategy);
}
if (this.defaultTyping != null) {
objectMapper.setDefaultTyping(this.defaultTyping);
}
if (this.serializationInclusion != null) {
objectMapper.setDefaultPropertyInclusion(this.serializationInclusion);
}
if (this.filters != null) {
objectMapper.setFilterProvider(this.filters);
}
objectMapper.addMixIn(ProblemDetail.class, ProblemDetailJacksonMixin.class);
this.mixIns.forEach(objectMapper::addMixIn);
if (!this.serializers.isEmpty() || !this.deserializers.isEmpty()) {
SimpleModule module = new SimpleModule();
addSerializers(module);
addDeserializers(module);
objectMapper.registerModule(module);
}
this.visibilities.forEach(objectMapper::setVisibility);
customizeDefaultFeatures(objectMapper);
this.features.forEach((feature, enabled) -> configureFeature(objectMapper, feature, enabled));
if (this.handlerInstantiator != null) {
objectMapper.setHandlerInstantiator(this.handlerInstantiator);
}
else if (this.applicationContext != null) {
objectMapper.setHandlerInstantiator(
new SpringHandlerInstantiator(this.applicationContext.getAutowireCapableBeanFactory()));
}
if (this.configurer != null) {
this.configurer.accept(objectMapper);
}
}
private void registerModule(Module module, MultiValueMap<Object, Module> modulesToRegister) {
if (module.getTypeId() == null) {
modulesToRegister.add(SimpleModule.class.getName(), module);
}
else {
modulesToRegister.set(module.getTypeId(), module);
}
}
// Any change to this method should be also applied to spring-jms and spring-messaging
// MappingJackson2MessageConverter default constructors
private void customizeDefaultFeatures(ObjectMapper objectMapper) {
if (!this.features.containsKey(MapperFeature.DEFAULT_VIEW_INCLUSION)) {
configureFeature(objectMapper, MapperFeature.DEFAULT_VIEW_INCLUSION, false);
}
if (!this.features.containsKey(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)) {
configureFeature(objectMapper, DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
}
}
@SuppressWarnings("unchecked")
private <T> void addSerializers(SimpleModule module) {
this.serializers.forEach((type, serializer) ->
module.addSerializer((Class<? extends T>) type, (JsonSerializer<T>) serializer));
}
@SuppressWarnings("unchecked")
private <T> void addDeserializers(SimpleModule module) {
this.deserializers.forEach((type, deserializer) ->
module.addDeserializer((Class<T>) type, (JsonDeserializer<? extends T>) deserializer));
}
@SuppressWarnings("deprecation") // on Jackson 2.13: configure(MapperFeature, boolean)
private void configureFeature(ObjectMapper objectMapper, Object feature, boolean enabled) {
if (feature instanceof JsonParser.Feature) {
objectMapper.configure((JsonParser.Feature) feature, enabled);
}
else if (feature instanceof JsonGenerator.Feature) {
objectMapper.configure((JsonGenerator.Feature) feature, enabled);
}
else if (feature instanceof SerializationFeature) {
objectMapper.configure((SerializationFeature) feature, enabled);
}
else if (feature instanceof DeserializationFeature) {
objectMapper.configure((DeserializationFeature) feature, enabled);
}
else if (feature instanceof MapperFeature) {
objectMapper.configure((MapperFeature) feature, enabled);
}
else {
throw new FatalBeanException("Unknown feature class: " + feature.getClass().getName());
}
}
@SuppressWarnings("unchecked")
private void registerWellKnownModulesIfAvailable(MultiValueMap<Object, Module> modulesToRegister) {
try {
Class<? extends Module> jdk8ModuleClass = (Class<? extends Module>)
ClassUtils.forName("com.fasterxml.jackson.datatype.jdk8.Jdk8Module", this.moduleClassLoader);
Module jdk8Module = BeanUtils.instantiateClass(jdk8ModuleClass);
modulesToRegister.set(jdk8Module.getTypeId(), jdk8Module);
}
catch (ClassNotFoundException ex) {
// jackson-datatype-jdk8 not available
}
try {
Class<? extends Module> javaTimeModuleClass = (Class<? extends Module>)
ClassUtils.forName("com.fasterxml.jackson.datatype.jsr310.JavaTimeModule", this.moduleClassLoader);
Module javaTimeModule = BeanUtils.instantiateClass(javaTimeModuleClass);
modulesToRegister.set(javaTimeModule.getTypeId(), javaTimeModule);
}
catch (ClassNotFoundException ex) {
// jackson-datatype-jsr310 not available
}
// Kotlin present?
if (KotlinDetector.isKotlinPresent()) {
try {
Class<? extends Module> kotlinModuleClass = (Class<? extends Module>)
ClassUtils.forName("com.fasterxml.jackson.module.kotlin.KotlinModule", this.moduleClassLoader);
Module kotlinModule = BeanUtils.instantiateClass(kotlinModuleClass);
modulesToRegister.set(kotlinModule.getTypeId(), kotlinModule);
}
catch (ClassNotFoundException ex) {
// jackson-module-kotlin not available
}
}
}
// Convenience factory methods
/**
* Obtain a {@link Jackson2ObjectMapperBuilder} instance in order to
* build a regular JSON {@link ObjectMapper} instance.
*/
public static Jackson2ObjectMapperBuilder json() {
return new Jackson2ObjectMapperBuilder();
}
/**
* Obtain a {@link Jackson2ObjectMapperBuilder} instance in order to
* build an {@link XmlMapper} instance.
*/
public static Jackson2ObjectMapperBuilder xml() {
return new Jackson2ObjectMapperBuilder().createXmlMapper(true);
}
/**
* Obtain a {@link Jackson2ObjectMapperBuilder} instance in order to
* build a Smile data format {@link ObjectMapper} instance.
* @since 5.0
*/
public static Jackson2ObjectMapperBuilder smile() {
return new Jackson2ObjectMapperBuilder().factory(new SmileFactoryInitializer().create());
}
/**
* Obtain a {@link Jackson2ObjectMapperBuilder} instance in order to
* build a CBOR data format {@link ObjectMapper} instance.
* @since 5.0
*/
public static Jackson2ObjectMapperBuilder cbor() {
return new Jackson2ObjectMapperBuilder().factory(new CborFactoryInitializer().create());
}
private static class XmlObjectMapperInitializer {
public ObjectMapper create(@Nullable JsonFactory factory) {
if (factory != null) {
return new XmlMapper((XmlFactory) factory);
}
else {
return new XmlMapper(StaxUtils.createDefensiveInputFactory());
}
}
public ObjectMapper create(boolean defaultUseWrapper, @Nullable JsonFactory factory) {
JacksonXmlModule module = new JacksonXmlModule();
module.setDefaultUseWrapper(defaultUseWrapper);
if (factory != null) {
return new XmlMapper((XmlFactory) factory, module);
}
else {
return new XmlMapper(new XmlFactory(StaxUtils.createDefensiveInputFactory()), module);
}
}
}
private static class SmileFactoryInitializer {
public JsonFactory create() {
return new SmileFactory();
}
}
private static class CborFactoryInitializer {
public JsonFactory create() {
return new CBORFactory();
}
}
}
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