com.fasterxml.jackson.databind.cfg.MapperConfig Maven / Gradle / Ivy
Show all versions of jackson-databind Show documentation
package com.fasterxml.jackson.databind.cfg;
import java.text.DateFormat;
import java.util.Locale;
import java.util.TimeZone;
import com.fasterxml.jackson.annotation.*;
import com.fasterxml.jackson.core.Base64Variant;
import com.fasterxml.jackson.core.SerializableString;
import com.fasterxml.jackson.core.io.SerializedString;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.introspect.AccessorNamingStrategy;
import com.fasterxml.jackson.databind.introspect.Annotated;
import com.fasterxml.jackson.databind.introspect.AnnotatedClass;
import com.fasterxml.jackson.databind.introspect.ClassIntrospector;
import com.fasterxml.jackson.databind.introspect.NopAnnotationIntrospector;
import com.fasterxml.jackson.databind.introspect.VisibilityChecker;
import com.fasterxml.jackson.databind.jsontype.DefaultBaseTypeLimitingValidator;
import com.fasterxml.jackson.databind.jsontype.PolymorphicTypeValidator;
import com.fasterxml.jackson.databind.jsontype.SubtypeResolver;
import com.fasterxml.jackson.databind.jsontype.TypeIdResolver;
import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;
import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.fasterxml.jackson.databind.util.ClassUtil;
/**
* Interface that defines functionality accessible through both
* serialization and deserialization configuration objects;
* accessors to mode-independent configuration settings
* and such.
* In addition, shared features are defined
* in {@link MapperFeature}.
*
* Small part of implementation is included here by aggregating
* {@link BaseSettings} instance that contains configuration
* that is shared between different types of instances.
*/
public abstract class MapperConfig>
implements ClassIntrospector.MixInResolver,
java.io.Serializable
{
private static final long serialVersionUID = 2L; // since 2.9
/**
* @since 2.7
*/
protected final static JsonInclude.Value EMPTY_INCLUDE = JsonInclude.Value.empty();
/**
* @since 2.7
*/
protected final static JsonFormat.Value EMPTY_FORMAT = JsonFormat.Value.empty();
/**
* Set of shared mapper features enabled.
*
* NOTE: changed from {@code int} (in Jackson 2.12 and prior} to {@code long}
* (2.13 and later)
*/
protected final long _mapperFeatures;
/**
* Immutable container object for simple configuration settings.
*/
protected final BaseSettings _base;
/*
/**********************************************************
/* Life-cycle: constructors
/**********************************************************
*/
protected MapperConfig(BaseSettings base, long mapperFeatures)
{
_base = base;
_mapperFeatures = mapperFeatures;
}
protected MapperConfig(MapperConfig src, long mapperFeatures)
{
_base = src._base;
_mapperFeatures = mapperFeatures;
}
protected MapperConfig(MapperConfig src, BaseSettings base)
{
_base = base;
_mapperFeatures = src._mapperFeatures;
}
protected MapperConfig(MapperConfig src)
{
_base = src._base;
_mapperFeatures = src._mapperFeatures;
}
/**
* Method that calculates bit set (flags) of all features that
* are enabled by default.
*/
public static & ConfigFeature> int collectFeatureDefaults(Class enumClass)
{
int flags = 0;
for (F value : enumClass.getEnumConstants()) {
if (value.enabledByDefault()) {
flags |= value.getMask();
}
}
return flags;
}
/*
/**********************************************************
/* Life-cycle: factory methods
/**********************************************************
*/
/**
* Method for constructing and returning a new instance with specified
* mapper features enabled.
*/
public abstract T with(MapperFeature... features);
/**
* Method for constructing and returning a new instance with specified
* mapper features disabled.
*/
public abstract T without(MapperFeature... features);
/**
* @since 2.3
*/
public abstract T with(MapperFeature feature, boolean state);
/*
/**********************************************************
/* Configuration: simple features
/**********************************************************
*/
/**
* Accessor for simple mapper features (which are shared for
* serialization, deserialization)
*/
public final boolean isEnabled(MapperFeature f) {
return f.enabledIn(_mapperFeatures);
}
/**
* "Bulk" access method for checking that all features specified by
* mask are enabled.
*
* @since 2.3
*
* @deprecated Since 2.13 -- no replacement
*/
@Deprecated
public final boolean hasMapperFeatures(int featureMask) {
return (_mapperFeatures & featureMask) == featureMask;
}
/**
* Method for determining whether annotation processing is enabled or not
* (default settings are typically that it is enabled; must explicitly disable).
*
* @return True if annotation processing is enabled; false if not
*/
public final boolean isAnnotationProcessingEnabled() {
return isEnabled(MapperFeature.USE_ANNOTATIONS);
}
/**
* Accessor for determining whether it is ok to try to force override of access
* modifiers to be able to get or set values of non-public Methods, Fields;
* to invoke non-public Constructors, Methods; or to instantiate non-public
* Classes. By default this is enabled, but on some platforms it needs to be
* prevented since if this would violate security constraints and cause failures.
*
* @return True if access modifier overriding is allowed (and may be done for
* any Field, Method, Constructor or Class); false to prevent any attempts
* to override.
*/
public final boolean canOverrideAccessModifiers() {
return isEnabled(MapperFeature.CAN_OVERRIDE_ACCESS_MODIFIERS);
}
/**
* Accessor for checking whether default settings for property handling
* indicate that properties should be alphabetically ordered or not.
*/
public final boolean shouldSortPropertiesAlphabetically() {
return isEnabled(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY);
}
/**
* Accessor for checking whether configuration indicates that
* "root wrapping" (use of an extra property/name pair at root level)
* is expected or not.
*/
public abstract boolean useRootWrapping();
/*
/**********************************************************
/* Configuration: factory methods
/**********************************************************
*/
/**
* Method for constructing a specialized textual object that can typically
* be serialized faster than basic {@link java.lang.String} (depending
* on escaping needed if any, char-to-byte encoding if needed).
*
* @param src Text to represent
*
* @return Optimized text object constructed
*
* @since 2.4
*/
public SerializableString compileString(String src) {
/* 20-Jan-2014, tatu: For now we will just construct it directly, but
* in future should allow overriding to support non-standard extensions
* to be used by extensions like Afterburner.
*/
return new SerializedString(src);
}
/*
/**********************************************************
/* Configuration: introspectors, mix-ins
/**********************************************************
*/
public ClassIntrospector getClassIntrospector() {
return _base.getClassIntrospector();
}
/**
* Method for getting {@link AnnotationIntrospector} configured
* to introspect annotation values used for configuration.
*
* Non-final since it is actually overridden by sub-classes (for now?)
*/
public AnnotationIntrospector getAnnotationIntrospector() {
if (isEnabled(MapperFeature.USE_ANNOTATIONS)) {
return _base.getAnnotationIntrospector();
}
return NopAnnotationIntrospector.instance;
}
public final PropertyNamingStrategy getPropertyNamingStrategy() {
return _base.getPropertyNamingStrategy();
}
// @since 2.12
public final AccessorNamingStrategy.Provider getAccessorNaming() {
return _base.getAccessorNaming();
}
public final HandlerInstantiator getHandlerInstantiator() {
return _base.getHandlerInstantiator();
}
/*
/**********************************************************
/* Configuration: type and subtype handling
/**********************************************************
*/
/**
* Method called to locate a type info handler for types that do not have
* one explicitly declared via annotations (or other configuration).
* If such default handler is configured, it is returned; otherwise
* null is returned.
*/
public final TypeResolverBuilder getDefaultTyper(JavaType baseType) {
return _base.getTypeResolverBuilder();
}
public abstract SubtypeResolver getSubtypeResolver();
/**
* Simple accessor for default {@link PolymorphicTypeValidator} to use for
* legacy Default Typing methods ({@code ObjectMapper.enableDefaultTyping()})
* and annotation based enabling.
*
* Since 2.11 will also check {@link MapperFeature#BLOCK_UNSAFE_POLYMORPHIC_BASE_TYPES}
* to possibly override default to more restrictive implementation, see
* {@link com.fasterxml.jackson.databind.jsontype.DefaultBaseTypeLimitingValidator}).
*
* @since 2.10
*/
public PolymorphicTypeValidator getPolymorphicTypeValidator() {
PolymorphicTypeValidator ptv = _base.getPolymorphicTypeValidator();
// [databind#2587]: allow stricter default settings:
if (ptv == LaissezFaireSubTypeValidator.instance) {
if (isEnabled(MapperFeature.BLOCK_UNSAFE_POLYMORPHIC_BASE_TYPES)) {
ptv = new DefaultBaseTypeLimitingValidator();
}
}
return ptv;
}
public final TypeFactory getTypeFactory() {
return _base.getTypeFactory();
}
/**
* Helper method that will construct {@link JavaType} for given
* raw class.
* This is a simple short-cut for:
*
* getTypeFactory().constructType(cls);
*
*/
public final JavaType constructType(Class cls) {
return getTypeFactory().constructType(cls);
}
/**
* Helper method that will construct {@link JavaType} for given
* type reference
* This is a simple short-cut for:
*
* getTypeFactory().constructType(valueTypeRef);
*
*/
public final JavaType constructType(TypeReference valueTypeRef) {
return getTypeFactory().constructType(valueTypeRef.getType());
}
public JavaType constructSpecializedType(JavaType baseType, Class subclass) {
// note: since 2.11 specify "strict" resolution
return getTypeFactory().constructSpecializedType(baseType, subclass, true);
}
/*
/**********************************************************
/* Configuration: introspection support
/**********************************************************
*/
/**
* Accessor for getting bean description that only contains class
* annotations: useful if no getter/setter/creator information is needed.
*/
public BeanDescription introspectClassAnnotations(Class cls) {
return introspectClassAnnotations(constructType(cls));
}
/**
* Accessor for getting bean description that only contains class
* annotations: useful if no getter/setter/creator information is needed.
*/
public BeanDescription introspectClassAnnotations(JavaType type) {
return getClassIntrospector().forClassAnnotations(this, type, this);
}
/**
* Accessor for getting bean description that only contains immediate class
* annotations: ones from the class, and its direct mix-in, if any, but
* not from super types.
*/
public BeanDescription introspectDirectClassAnnotations(Class cls) {
return introspectDirectClassAnnotations(constructType(cls));
}
/**
* Accessor for getting bean description that only contains immediate class
* annotations: ones from the class, and its direct mix-in, if any, but
* not from super types.
*/
public final BeanDescription introspectDirectClassAnnotations(JavaType type) {
return getClassIntrospector().forDirectClassAnnotations(this, type, this);
}
/*
/**********************************************************
/* Configuration: default settings with per-type overrides
/**********************************************************
*/
/**
* Accessor for finding {@link ConfigOverride} to use for
* properties of given type, if any exist; or return `null` if not.
*
* Note that only directly associated override
* is found; no type hierarchy traversal is performed.
*
* @since 2.8
*
* @return Override object to use for the type, if defined; null if none.
*/
public abstract ConfigOverride findConfigOverride(Class type);
/**
* Accessor for finding {@link ConfigOverride} to use for
* properties of given type, if any exist; or if none, return an immutable
* "empty" instance with no overrides.
*
* Note that only directly associated override
* is found; no type hierarchy traversal is performed.
*
* @since 2.9
*
* @return Override object to use for the type, never null (but may be empty)
*/
public abstract ConfigOverride getConfigOverride(Class type);
/**
* Accessor for default property inclusion to use for serialization,
* used unless overridden by per-type or per-property overrides.
*
* @since 2.7
*/
public abstract JsonInclude.Value getDefaultPropertyInclusion();
/**
* Accessor for default property inclusion to use for serialization,
* considering possible per-type override for given base type.
* NOTE: if no override found, defaults to value returned by
* {@link #getDefaultPropertyInclusion()}.
*
* @since 2.7
*/
public abstract JsonInclude.Value getDefaultPropertyInclusion(Class baseType);
/**
* Accessor for default property inclusion to use for serialization,
* considering possible per-type override for given base type; but
* if none found, returning given defaultIncl
*
* @param defaultIncl Inclusion setting to return if no overrides found.
*
* @since 2.8.2
*/
public JsonInclude.Value getDefaultPropertyInclusion(Class baseType,
JsonInclude.Value defaultIncl)
{
JsonInclude.Value v = getConfigOverride(baseType).getInclude();
if (v != null) {
return v;
}
return defaultIncl;
}
/**
* Accessor for default property inclusion to use for serialization,
* considering possible per-type override for given base type and
* possible per-type override for given property type.
* NOTE: if no override found, defaults to value returned by
* {@link #getDefaultPropertyInclusion()}.
*
* @param baseType Type of the instance containing the targeted property.
* @param propertyType Type of the property to look up inclusion setting for.
*
* @since 2.9
*/
public abstract JsonInclude.Value getDefaultInclusion(Class baseType,
Class propertyType);
/**
* Accessor for default property inclusion to use for serialization,
* considering possible per-type override for given base type and
* possible per-type override for given property type; but
* if none found, returning given defaultIncl
*
* @param baseType Type of the instance containing the targeted property.
* @param propertyType Type of the property to look up inclusion setting for.
* @param defaultIncl Inclusion setting to return if no overrides found.
*
* @since 2.9
*/
public JsonInclude.Value getDefaultInclusion(Class baseType,
Class propertyType, JsonInclude.Value defaultIncl)
{
JsonInclude.Value baseOverride = getConfigOverride(baseType).getInclude();
JsonInclude.Value propOverride = getConfigOverride(propertyType).getIncludeAsProperty();
JsonInclude.Value result = JsonInclude.Value.mergeAll(defaultIncl, baseOverride, propOverride);
return result;
}
/**
* Accessor for default format settings to use for serialization (and, to a degree
* deserialization), considering baseline settings and per-type defaults
* for given base type (if any).
*
* @since 2.7
*/
public abstract JsonFormat.Value getDefaultPropertyFormat(Class baseType);
/**
* Accessor for default property ignorals to use, if any, for given base type,
* based on config overrides settings (see {@link #findConfigOverride(Class)}).
*
* @since 2.8
*/
public abstract JsonIgnoreProperties.Value getDefaultPropertyIgnorals(Class baseType);
/**
* Helper method that may be called to see if there are property ignoral
* definitions from annotations (via {@link AnnotatedClass}) or through
* "config overrides". If both exist, config overrides have precedence
* over class annotations.
*
* @since 2.8
*/
public abstract JsonIgnoreProperties.Value getDefaultPropertyIgnorals(Class baseType,
AnnotatedClass actualClass);
/**
* Helper method that may be called to see if there are property inclusion
* definitions from annotations (via {@link AnnotatedClass}).
*
* TODO: config override.
*
* @since 2.12
*/
public abstract JsonIncludeProperties.Value getDefaultPropertyInclusions(Class baseType,
AnnotatedClass actualClass);
/**
* Accessor for object used for determining whether specific property elements
* (method, constructors, fields) can be auto-detected based on
* their visibility (access modifiers). Can be changed to allow
* different minimum visibility levels for auto-detection. Note
* that this is the global handler; individual types (classes)
* can further override active checker used (using
* {@link JsonAutoDetect} annotation)
*/
public abstract VisibilityChecker getDefaultVisibilityChecker();
/**
* Accessor for object used for determining whether specific property elements
* (method, constructors, fields) can be auto-detected based on
* their visibility (access modifiers). This is based on global defaults
* (as would be returned by {@link #getDefaultVisibilityChecker()}, but
* then modified by possible class annotation (see {@link JsonAutoDetect})
* and/or per-type config override (see {@link ConfigOverride#getVisibility()}).
*
* @since 2.9
*/
public abstract VisibilityChecker getDefaultVisibilityChecker(Class baseType,
AnnotatedClass actualClass);
/**
* Accessor for the baseline setter info used as the global baseline,
* not considering possible per-type overrides.
*
* @return Global base settings; never null
*
* @since 2.9
*/
public abstract JsonSetter.Value getDefaultSetterInfo();
/**
* Accessor for the baseline merge info used as the global baseline,
* not considering possible per-type overrides.
*
* @return Global base settings, if any; `null` if none.
*
* @since 2.9
*/
public abstract Boolean getDefaultMergeable();
/**
* Accessor for the baseline merge info used for given type, including global
* defaults if no type-specific overrides defined.
*
* @return Type-specific settings (if any); global defaults (same as
* {@link #getDefaultMergeable()}) otherwise, if any defined; or `null`
* if neither defined
*
* @since 2.9
*/
public abstract Boolean getDefaultMergeable(Class baseType);
/*
/**********************************************************
/* Configuration: other
/**********************************************************
*/
/**
* Method for accessing currently configured (textual) date format
* that will be used for reading or writing date values (in case
* of writing, only if textual output is configured; not if dates
* are to be serialized as time stamps).
*
* Note that typically {@link DateFormat} instances are not thread-safe
* (at least ones provided by JDK):
* this means that calling code should clone format instance before
* using it.
*
* This method is usually only called by framework itself, since there
* are convenience methods available via
* {@link DeserializationContext} and {@link SerializerProvider} that
* take care of cloning and thread-safe reuse.
*/
public final DateFormat getDateFormat() { return _base.getDateFormat(); }
/**
* Method for accessing the default {@link java.util.Locale} to use
* for formatting, unless overridden by local annotations.
* Initially set to {@link Locale#getDefault()}.
*/
public final Locale getLocale() { return _base.getLocale(); }
/**
* Method for accessing the default {@link java.util.TimeZone} to use
* for formatting, unless overridden by local annotations.
* Initially set to {@link TimeZone#getDefault()}.
*/
public final TimeZone getTimeZone() { return _base.getTimeZone(); }
/**
* Method for checking whether a {@link java.util.TimeZone} has been explicitly
* set for this configuring during construction of {@code ObjectMapper}
* or if it still has the default timezone/offset (zero-offset, "zulu").
*
* @return {@code true} if this configuration has explicitly specified
* {@link java.util.TimeZone}, or {@code false} if it uses the default
* time zone
*
* @since 2.12
*/
public boolean hasExplicitTimeZone() {
return _base.hasExplicitTimeZone();
}
/**
* Accessor for finding currently active view, if any (null if none)
*/
public abstract Class getActiveView();
/**
* Method called during deserialization if Base64 encoded content
* needs to be decoded. Default version just returns default Jackson
* uses, which is modified-mime which does not add linefeeds (because
* those would have to be escaped in JSON strings); but this can
* be configured on {@link ObjectWriter}.
*/
public Base64Variant getBase64Variant() {
return _base.getBase64Variant();
}
/**
* Method for accessing per-instance shared (baseline/default)
* attribute values; these are used as the basis for per-call
* attributes.
*
* @since 2.3
*/
public abstract ContextAttributes getAttributes();
/**
* @since 2.6
*/
public abstract PropertyName findRootName(JavaType rootType);
/**
* @since 2.6
*/
public abstract PropertyName findRootName(Class rawRootType);
/*
/**********************************************************
/* Methods for instantiating handlers
/**********************************************************
*/
/**
* Method that can be called to obtain an instance of TypeIdResolver of
* specified type.
*/
public TypeResolverBuilder typeResolverBuilderInstance(Annotated annotated,
Class> builderClass)
{
HandlerInstantiator hi = getHandlerInstantiator();
if (hi != null) {
TypeResolverBuilder builder = hi.typeResolverBuilderInstance(this, annotated, builderClass);
if (builder != null) {
return builder;
}
}
return (TypeResolverBuilder) ClassUtil.createInstance(builderClass, canOverrideAccessModifiers());
}
/**
* Method that can be called to obtain an instance of TypeIdResolver of
* specified type.
*/
public TypeIdResolver typeIdResolverInstance(Annotated annotated,
Class resolverClass)
{
HandlerInstantiator hi = getHandlerInstantiator();
if (hi != null) {
TypeIdResolver builder = hi.typeIdResolverInstance(this, annotated, resolverClass);
if (builder != null) {
return builder;
}
}
return (TypeIdResolver) ClassUtil.createInstance(resolverClass, canOverrideAccessModifiers());
}
}