com.groupbyinc.common.jackson.databind.cfg.BaseSettings Maven / Gradle / Ivy
package com.fasterxml.jackson.databind.cfg;
import java.text.DateFormat;
import java.util.Locale;
import java.util.TimeZone;
import com.fasterxml.jackson.core.Base64Variant;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair;
import com.fasterxml.jackson.databind.introspect.ClassIntrospector;
import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.fasterxml.jackson.databind.util.StdDateFormat;
/**
* Immutable container class used to store simple configuration
* settings. Since instances are fully immutable, instances can
* be freely shared and used without synchronization.
*/
public final class BaseSettings
implements java.io.Serializable
{
// for 2.6
private static final long serialVersionUID = 1L;
/**
* We will use a default TimeZone as the baseline.
*/
private static final TimeZone DEFAULT_TIMEZONE =
// TimeZone.getDefault()
/* [databind#915] 05-Nov-2015, tatu: Changed to UTC, from earlier
* baseline of GMT (up to 2.6)
*/
TimeZone.getTimeZone("UTC");
/*
/**********************************************************
/* Configuration settings; introspection, related
/**********************************************************
*/
/**
* Introspector used to figure out Bean properties needed for bean serialization
* and deserialization. Overridable so that it is possible to change low-level
* details of introspection, like adding new annotation types.
*/
protected final ClassIntrospector _classIntrospector;
/**
* Introspector used for accessing annotation value based configuration.
*/
protected final AnnotationIntrospector _annotationIntrospector;
/**
* Custom property naming strategy in use, if any.
*/
protected final PropertyNamingStrategy _propertyNamingStrategy;
/**
* Specific factory used for creating {@link JavaType} instances;
* needed to allow modules to add more custom type handling
* (mostly to support types of non-Java JVM languages)
*/
protected final TypeFactory _typeFactory;
/*
/**********************************************************
/* Configuration settings; type resolution
/**********************************************************
*/
/**
* Type information handler used for "untyped" values (ones declared
* to have type Object.class)
*/
protected final TypeResolverBuilder _typeResolverBuilder;
/*
/**********************************************************
/* Configuration settings; other
/**********************************************************
*/
/**
* Custom date format to use for de-serialization. If specified, will be
* used instead of {@link com.fasterxml.jackson.databind.util.StdDateFormat}.
*
* Note that the configured format object will be cloned once per
* deserialization process (first time it is needed)
*/
protected final DateFormat _dateFormat;
/**
* Object used for creating instances of handlers (serializers, deserializers,
* type and type id resolvers), given class to instantiate. This is typically
* used to do additional configuration (with dependency injection, for example)
* beyond simply construction of instances; or to use alternative constructors.
*/
protected final HandlerInstantiator _handlerInstantiator;
/**
* Default {@link java.util.Locale} used with serialization formats.
* Default value is {@link Locale#getDefault()}.
*/
protected final Locale _locale;
/**
* Default {@link java.util.TimeZone} used with serialization formats,
* if (and only if!) explicitly set by use; otherwise `null` to indicate
* "use default", which means "UTC" (from Jackson 2.7); earlier versions
* (up to 2.6) used "GMT".
*
* Note that if a new value is set, timezone is also assigned to
* {@link #_dateFormat} of this object.
*/
protected final TimeZone _timeZone;
/**
* Explicitly default {@link Base64Variant} to use for handling
* binary data (byte[]), used with data formats
* that use base64 encoding (like JSON, CSV).
*
* @since 2.1
*/
protected final Base64Variant _defaultBase64;
/*
/**********************************************************
/* Construction
/**********************************************************
*/
public BaseSettings(ClassIntrospector ci, AnnotationIntrospector ai,
PropertyNamingStrategy pns, TypeFactory tf,
TypeResolverBuilder typer, DateFormat dateFormat, HandlerInstantiator hi,
Locale locale, TimeZone tz, Base64Variant defaultBase64)
{
_classIntrospector = ci;
_annotationIntrospector = ai;
_propertyNamingStrategy = pns;
_typeFactory = tf;
_typeResolverBuilder = typer;
_dateFormat = dateFormat;
_handlerInstantiator = hi;
_locale = locale;
_timeZone = tz;
_defaultBase64 = defaultBase64;
}
/**
* Turns out we are not necessarily 100% stateless, alas, since {@link ClassIntrospector}
* typically has a cache. So this method is needed for deep copy() of Mapper.
*
* @since 2.9.6
*/
public BaseSettings copy() {
return new BaseSettings(_classIntrospector.copy(),
_annotationIntrospector,
_propertyNamingStrategy,
_typeFactory,
_typeResolverBuilder,
_dateFormat,
_handlerInstantiator,
_locale,
_timeZone,
_defaultBase64);
}
/*
/**********************************************************
/* Factory methods
/**********************************************************
*/
public BaseSettings withClassIntrospector(ClassIntrospector ci) {
if (_classIntrospector == ci) {
return this;
}
return new BaseSettings(ci, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
_typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
_timeZone, _defaultBase64);
}
public BaseSettings withAnnotationIntrospector(AnnotationIntrospector ai) {
if (_annotationIntrospector == ai) {
return this;
}
return new BaseSettings(_classIntrospector, ai, _propertyNamingStrategy, _typeFactory,
_typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
_timeZone, _defaultBase64);
}
public BaseSettings withInsertedAnnotationIntrospector(AnnotationIntrospector ai) {
return withAnnotationIntrospector(AnnotationIntrospectorPair.create(ai, _annotationIntrospector));
}
public BaseSettings withAppendedAnnotationIntrospector(AnnotationIntrospector ai) {
return withAnnotationIntrospector(AnnotationIntrospectorPair.create(_annotationIntrospector, ai));
}
/*
public BaseSettings withVisibility(PropertyAccessor forMethod, JsonAutoDetect.Visibility visibility) {
return new BaseSettings(_classIntrospector, _annotationIntrospector,
_visibilityChecker.withVisibility(forMethod, visibility),
_propertyNamingStrategy, _typeFactory,
_typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
_timeZone, _defaultBase64);
}
*/
public BaseSettings withPropertyNamingStrategy(PropertyNamingStrategy pns) {
if (_propertyNamingStrategy == pns) {
return this;
}
return new BaseSettings(_classIntrospector, _annotationIntrospector, pns, _typeFactory,
_typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
_timeZone, _defaultBase64);
}
public BaseSettings withTypeFactory(TypeFactory tf) {
if (_typeFactory == tf) {
return this;
}
return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, tf,
_typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
_timeZone, _defaultBase64);
}
public BaseSettings withTypeResolverBuilder(TypeResolverBuilder typer) {
if (_typeResolverBuilder == typer) {
return this;
}
return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
typer, _dateFormat, _handlerInstantiator, _locale,
_timeZone, _defaultBase64);
}
public BaseSettings withDateFormat(DateFormat df) {
if (_dateFormat == df) {
return this;
}
// 26-Sep-2015, tatu: Related to [databind#939], let's try to force TimeZone if
// (but only if!) it has been set explicitly.
if ((df != null) && hasExplicitTimeZone()) {
df = _force(df, _timeZone);
}
return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
_typeResolverBuilder, df, _handlerInstantiator, _locale,
_timeZone, _defaultBase64);
}
public BaseSettings withHandlerInstantiator(HandlerInstantiator hi) {
if (_handlerInstantiator == hi) {
return this;
}
return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
_typeResolverBuilder, _dateFormat, hi, _locale,
_timeZone, _defaultBase64);
}
public BaseSettings with(Locale l) {
if (_locale == l) {
return this;
}
return new BaseSettings(_classIntrospector, _annotationIntrospector, _propertyNamingStrategy, _typeFactory,
_typeResolverBuilder, _dateFormat, _handlerInstantiator, l,
_timeZone, _defaultBase64);
}
/**
* Fluent factory for constructing a new instance that uses specified TimeZone.
* Note that timezone used with also be assigned to configured {@link DateFormat},
* changing time formatting defaults.
*/
public BaseSettings with(TimeZone tz)
{
if (tz == null) {
throw new IllegalArgumentException();
}
if (tz == _timeZone) {
return this;
}
DateFormat df = _force(_dateFormat, tz);
return new BaseSettings(_classIntrospector, _annotationIntrospector,
_propertyNamingStrategy, _typeFactory,
_typeResolverBuilder, df, _handlerInstantiator, _locale,
tz, _defaultBase64);
}
/**
* @since 2.1
*/
public BaseSettings with(Base64Variant base64) {
if (base64 == _defaultBase64) {
return this;
}
return new BaseSettings(_classIntrospector, _annotationIntrospector,
_propertyNamingStrategy, _typeFactory,
_typeResolverBuilder, _dateFormat, _handlerInstantiator, _locale,
_timeZone, base64);
}
/*
/**********************************************************
/* API
/**********************************************************
*/
public ClassIntrospector getClassIntrospector() {
return _classIntrospector;
}
public AnnotationIntrospector getAnnotationIntrospector() {
return _annotationIntrospector;
}
public PropertyNamingStrategy getPropertyNamingStrategy() {
return _propertyNamingStrategy;
}
public TypeFactory getTypeFactory() {
return _typeFactory;
}
public TypeResolverBuilder getTypeResolverBuilder() {
return _typeResolverBuilder;
}
public DateFormat getDateFormat() {
return _dateFormat;
}
public HandlerInstantiator getHandlerInstantiator() {
return _handlerInstantiator;
}
public Locale getLocale() {
return _locale;
}
public TimeZone getTimeZone() {
TimeZone tz = _timeZone;
return (tz == null) ? DEFAULT_TIMEZONE : tz;
}
/**
* Accessor that may be called to determine whether this settings object
* has been explicitly configured with a TimeZone (true), or is still
* relying on the default settings (false).
*
* @since 2.7
*/
public boolean hasExplicitTimeZone() {
return (_timeZone != null);
}
public Base64Variant getBase64Variant() {
return _defaultBase64;
}
/*
/**********************************************************
/* Helper methods
/**********************************************************
*/
private DateFormat _force(DateFormat df, TimeZone tz)
{
if (df instanceof StdDateFormat) {
return ((StdDateFormat) df).withTimeZone(tz);
}
// we don't know if original format might be shared; better create a clone:
df = (DateFormat) df.clone();
df.setTimeZone(tz);
return df;
}
}