com.fasterxml.jackson.databind.cfg.MapperConfig Maven / Gradle / Ivy
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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.type.TypeReference;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.introspect.Annotated;
import com.fasterxml.jackson.databind.introspect.ClassIntrospector;
import com.fasterxml.jackson.databind.introspect.VisibilityChecker;
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.type.TypeBindings;
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 = 8891625428805876137L;
/**
* Set of shared mapper features enabled.
*/
protected final int _mapperFeatures;
/**
* Immutable container object for simple configuration settings.
*/
protected final BaseSettings _base;
/*
/**********************************************************
/* Life-cycle: constructors
/**********************************************************
*/
protected MapperConfig(BaseSettings base, int mapperFeatures)
{
_base = base;
_mapperFeatures = 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 (_mapperFeatures & f.getMask()) != 0;
}
/**
* "Bulk" access method for checking that all features specified by
* mask are enabled.
*
* @since 2.3
*/
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: 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() {
return _base.getAnnotationIntrospector();
}
/**
* 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 VisibilityChecker getDefaultVisibilityChecker() {
return _base.getVisibilityChecker();
}
public final PropertyNamingStrategy getPropertyNamingStrategy() {
return _base.getPropertyNamingStrategy();
}
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();
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, (TypeBindings) null);
}
/**
* 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(), (TypeBindings) null);
}
public JavaType constructSpecializedType(JavaType baseType, Class subclass) {
return getTypeFactory().constructSpecializedType(baseType, subclass);
}
/*
/**********************************************************
/* 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 abstract BeanDescription introspectClassAnnotations(JavaType type);
/**
* 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 abstract BeanDescription introspectDirectClassAnnotations(JavaType type);
/*
/**********************************************************
/* 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(); }
/**
* 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();
/*
/**********************************************************
/* 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());
}
}