com.fasterxml.jackson.databind.cfg.MapperConfigBase Maven / Gradle / Ivy
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package com.fasterxml.jackson.databind.cfg;
import java.text.DateFormat;
import java.util.*;
import com.fasterxml.jackson.annotation.*;
import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
import com.fasterxml.jackson.core.Base64Variant;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.introspect.ClassIntrospector;
import com.fasterxml.jackson.databind.introspect.ClassIntrospector.MixInResolver;
import com.fasterxml.jackson.databind.introspect.AccessorNamingStrategy;
import com.fasterxml.jackson.databind.introspect.AnnotatedClass;
import com.fasterxml.jackson.databind.introspect.SimpleMixInResolver;
import com.fasterxml.jackson.databind.introspect.VisibilityChecker;
import com.fasterxml.jackson.databind.jsontype.SubtypeResolver;
import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.fasterxml.jackson.databind.util.ClassUtil;
import com.fasterxml.jackson.databind.util.RootNameLookup;
@SuppressWarnings("serial")
public abstract class MapperConfigBase>
extends MapperConfig
implements java.io.Serializable
{
/**
* @since 2.9
*/
protected final static ConfigOverride EMPTY_OVERRIDE = ConfigOverride.empty();
private final static long DEFAULT_MAPPER_FEATURES = MapperFeature.collectLongDefaults();
/**
* @since 2.9
*/
private final static long AUTO_DETECT_MASK =
MapperFeature.AUTO_DETECT_FIELDS.getLongMask()
| MapperFeature.AUTO_DETECT_GETTERS.getLongMask()
| MapperFeature.AUTO_DETECT_IS_GETTERS.getLongMask()
| MapperFeature.AUTO_DETECT_SETTERS.getLongMask()
| MapperFeature.AUTO_DETECT_CREATORS.getLongMask()
;
/*
/**********************************************************
/* Immutable config
/**********************************************************
*/
/**
* Mix-in annotation mappings to use, if any: immutable,
* cannot be changed once defined.
*
* @since 2.6
*/
protected final SimpleMixInResolver _mixIns;
/**
* Registered concrete subtypes that can be used instead of (or
* in addition to) ones declared using annotations.
*
* Note that instances are stateful and as such may need to be copied,
* and may NOT be demoted down to {@link BaseSettings}.
*/
protected final SubtypeResolver _subtypeResolver;
/**
* Explicitly defined root name to use, if any; if empty
* String, will disable root-name wrapping; if null, will
* use defaults
*/
protected final PropertyName _rootName;
/**
* View to use for filtering out properties to serialize
* or deserialize.
* Null if none (will also be assigned null if Object.class
* is defined), meaning that all properties are to be included.
*/
protected final Class _view;
/**
* Contextual attributes accessible (get and set) during processing,
* on per-call basis.
*
* @since 2.3
*/
protected final ContextAttributes _attributes;
/**
* Simple cache used for finding out possible root name for root name
* wrapping.
*
* Note that instances are stateful (for caching) and as such may need to be copied,
* and may NOT be demoted down to {@link BaseSettings}.
*
* @since 2.6
*/
protected final RootNameLookup _rootNames;
/**
* Configuration overrides to apply, keyed by type of property.
*
* @since 2.8
*/
protected final ConfigOverrides _configOverrides;
/**
* Set of {@link DatatypeFeature}s enabled.
*
* @since 2.14
*/
protected final DatatypeFeatures _datatypeFeatures;
/*
/**********************************************************
/* Construction
/**********************************************************
*/
/**
* Constructor used when creating a new instance (compared to
* that of creating fluent copies)
*
* @since 2.14
*/
protected MapperConfigBase(BaseSettings base,
SubtypeResolver str, SimpleMixInResolver mixins, RootNameLookup rootNames,
ConfigOverrides configOverrides, DatatypeFeatures datatypeFeatures)
{
super(base, DEFAULT_MAPPER_FEATURES);
_mixIns = mixins;
_subtypeResolver = str;
_rootNames = rootNames;
_rootName = null;
_view = null;
// default to "no attributes"
_attributes = ContextAttributes.getEmpty();
_configOverrides = configOverrides;
_datatypeFeatures = datatypeFeatures;
}
/**
* Copy constructor usually called to make a copy for use by
* ObjectMapper that is copied.
*
* @since 2.14
*/
protected MapperConfigBase(MapperConfigBase src,
SubtypeResolver str, SimpleMixInResolver mixins, RootNameLookup rootNames,
ConfigOverrides configOverrides)
{
// 18-Apr-2018, tatu: [databind#1898] need to force copying of `ClassIntrospector`
// (to clear its cache) to avoid leakage
super(src, src._base.copy());
_mixIns = mixins;
_subtypeResolver = str;
_rootNames = rootNames;
_rootName = src._rootName;
_view = src._view;
_attributes = src._attributes;
_configOverrides = configOverrides;
_datatypeFeatures = src._datatypeFeatures;
}
/**
* Pass-through constructor used when no changes are needed to the
* base class.
*/
protected MapperConfigBase(MapperConfigBase src)
{
super(src);
_mixIns = src._mixIns;
_subtypeResolver = src._subtypeResolver;
_rootNames = src._rootNames;
_rootName = src._rootName;
_view = src._view;
_attributes = src._attributes;
_configOverrides = src._configOverrides;
_datatypeFeatures = src._datatypeFeatures;
}
protected MapperConfigBase(MapperConfigBase src, BaseSettings base)
{
super(src, base);
_mixIns = src._mixIns;
_subtypeResolver = src._subtypeResolver;
_rootNames = src._rootNames;
_rootName = src._rootName;
_view = src._view;
_attributes = src._attributes;
_configOverrides = src._configOverrides;
_datatypeFeatures = src._datatypeFeatures;
}
protected MapperConfigBase(MapperConfigBase src, long mapperFeatures)
{
super(src, mapperFeatures);
_mixIns = src._mixIns;
_subtypeResolver = src._subtypeResolver;
_rootNames = src._rootNames;
_rootName = src._rootName;
_view = src._view;
_attributes = src._attributes;
_configOverrides = src._configOverrides;
_datatypeFeatures = src._datatypeFeatures;
}
protected MapperConfigBase(MapperConfigBase src, SubtypeResolver str) {
super(src);
_mixIns = src._mixIns;
_subtypeResolver = str;
_rootNames = src._rootNames;
_rootName = src._rootName;
_view = src._view;
_attributes = src._attributes;
_configOverrides = src._configOverrides;
_datatypeFeatures = src._datatypeFeatures;
}
protected MapperConfigBase(MapperConfigBase src, PropertyName rootName) {
super(src);
_mixIns = src._mixIns;
_subtypeResolver = src._subtypeResolver;
_rootNames = src._rootNames;
_rootName = rootName;
_view = src._view;
_attributes = src._attributes;
_configOverrides = src._configOverrides;
_datatypeFeatures = src._datatypeFeatures;
}
protected MapperConfigBase(MapperConfigBase src, Class view)
{
super(src);
_mixIns = src._mixIns;
_subtypeResolver = src._subtypeResolver;
_rootNames = src._rootNames;
_rootName = src._rootName;
_view = view;
_attributes = src._attributes;
_configOverrides = src._configOverrides;
_datatypeFeatures = src._datatypeFeatures;
}
/**
* @since 2.1
*/
protected MapperConfigBase(MapperConfigBase src, SimpleMixInResolver mixins)
{
super(src);
_mixIns = mixins;
_subtypeResolver = src._subtypeResolver;
_rootNames = src._rootNames;
_rootName = src._rootName;
_view = src._view;
_attributes = src._attributes;
_configOverrides = src._configOverrides;
_datatypeFeatures = src._datatypeFeatures;
}
/**
* @since 2.3
*/
protected MapperConfigBase(MapperConfigBase src, ContextAttributes attr)
{
super(src);
_mixIns = src._mixIns;
_subtypeResolver = src._subtypeResolver;
_rootNames = src._rootNames;
_rootName = src._rootName;
_view = src._view;
_attributes = attr;
_configOverrides = src._configOverrides;
_datatypeFeatures = src._datatypeFeatures;
}
/**
* @since 2.14
*/
protected MapperConfigBase(MapperConfigBase src, DatatypeFeatures datatypeFeatures)
{
super(src);
_mixIns = src._mixIns;
_subtypeResolver = src._subtypeResolver;
_rootNames = src._rootNames;
_rootName = src._rootName;
_view = src._view;
_attributes = src._attributes;
_configOverrides = src._configOverrides;
_datatypeFeatures = datatypeFeatures;
}
/*
/**********************************************************************
/* Abstract fluent factory methods to be implemented by subtypes
/**********************************************************************
*/
/**
* @since 2.9 (in this case, demoted from sub-classes)
*/
protected abstract T _withBase(BaseSettings newBase);
/**
* @since 2.9 (in this case, demoted from sub-classes)
*/
protected abstract T _withMapperFeatures(long mapperFeatures);
/**
* @since 2.14
*/
protected abstract T _with(DatatypeFeatures dtFeatures);
/**
* @since 2.14
*/
protected DatatypeFeatures _datatypeFeatures() {
return _datatypeFeatures;
}
/*
/**********************************************************************
/* Additional shared fluent factory methods; MapperFeatures
/**********************************************************************
*/
/**
* Fluent factory method that will construct and return a new configuration
* object instance with specified features enabled.
*/
@SuppressWarnings("unchecked")
@Override
public final T with(MapperFeature... features)
{
long newMapperFlags = _mapperFeatures;
for (MapperFeature f : features) {
newMapperFlags |= f.getLongMask();
}
if (newMapperFlags == _mapperFeatures) {
return (T) this;
}
return _withMapperFeatures(newMapperFlags);
}
/**
* Fluent factory method that will construct and return a new configuration
* object instance with specified features disabled.
*/
@SuppressWarnings("unchecked")
@Override
public final T without(MapperFeature... features)
{
long newMapperFlags = _mapperFeatures;
for (MapperFeature f : features) {
newMapperFlags &= ~f.getLongMask();
}
if (newMapperFlags == _mapperFeatures) {
return (T) this;
}
return _withMapperFeatures(newMapperFlags);
}
@SuppressWarnings("unchecked")
@Override
public final T with(MapperFeature feature, boolean state)
{
long newMapperFlags;
if (state) {
newMapperFlags = _mapperFeatures | feature.getLongMask();
} else {
newMapperFlags = _mapperFeatures & ~feature.getLongMask();
}
if (newMapperFlags == _mapperFeatures) {
return (T) this;
}
return _withMapperFeatures(newMapperFlags);
}
/*
/**********************************************************************
/* Additional shared fluent factory methods; DatatypeFeatures
/**********************************************************************
*/
/**
* Fluent factory method that will return a configuration
* object instance with specified feature enabled: this may be
* {@code this} instance (if no changes effected), or a newly
* constructed instance.
*/
public final T with(DatatypeFeature feature) {
return _with(_datatypeFeatures().with(feature));
}
/**
* Fluent factory method that will return a configuration
* object instance with specified features enabled: this may be
* {@code this} instance (if no changes effected), or a newly
* constructed instance.
*/
public final T withFeatures(DatatypeFeature... features) {
return _with(_datatypeFeatures().withFeatures(features));
}
/**
* Fluent factory method that will return a configuration
* object instance with specified feature disabled: this may be
* {@code this} instance (if no changes effected), or a newly
* constructed instance.
*/
public final T without(DatatypeFeature feature) {
return _with(_datatypeFeatures().without(feature));
}
/**
* Fluent factory method that will return a configuration
* object instance with specified features disabled: this may be
* {@code this} instance (if no changes effected), or a newly
* constructed instance.
*/
public final T withoutFeatures(DatatypeFeature... features) {
return _with(_datatypeFeatures().withoutFeatures(features));
}
/**
* Fluent factory method that will construct and return a new configuration
* object instance with specified features disabled.
*/
public final T with(DatatypeFeature feature, boolean state)
{
DatatypeFeatures features = _datatypeFeatures();
features = state ? features.with(feature) : features.without(feature);
return _with(features);
}
/*
/**********************************************************************
/* Additional shared fluent factory methods; introspectors
/**********************************************************************
*/
/**
* Method for constructing and returning a new instance with different
* {@link AnnotationIntrospector} to use (replacing old one).
*
* NOTE: make sure to register new instance with ObjectMapper
* if directly calling this method.
*/
public final T with(AnnotationIntrospector ai) {
return _withBase(_base.withAnnotationIntrospector(ai));
}
/**
* Method for constructing and returning a new instance with additional
* {@link AnnotationIntrospector} appended (as the lowest priority one)
*/
public final T withAppendedAnnotationIntrospector(AnnotationIntrospector ai) {
return _withBase(_base.withAppendedAnnotationIntrospector(ai));
}
/**
* Method for constructing and returning a new instance with additional
* {@link AnnotationIntrospector} inserted (as the highest priority one)
*/
public final T withInsertedAnnotationIntrospector(AnnotationIntrospector ai) {
return _withBase(_base.withInsertedAnnotationIntrospector(ai));
}
/**
* Method for constructing and returning a new instance with different
* {@link ClassIntrospector}
* to use.
*
* NOTE: make sure to register new instance with ObjectMapper
* if directly calling this method.
*/
public final T with(ClassIntrospector ci) {
return _withBase(_base.withClassIntrospector(ci));
}
/*
/**********************************************************************
/* Additional shared fluent factory methods; attributes
/**********************************************************************
*/
/**
* Method for constructing an instance that has specified
* contextual attributes.
*
* @since 2.3
*/
public abstract T with(ContextAttributes attrs);
/**
* Method for constructing an instance that has only specified
* attributes, removing any attributes that exist before the call.
*
* @since 2.3
*/
public T withAttributes(Map attributes) {
return with(getAttributes().withSharedAttributes(attributes));
}
/**
* Method for constructing an instance that has specified
* value for attribute for given key.
*
* @since 2.3
*/
public T withAttribute(Object key, Object value) {
return with(getAttributes().withSharedAttribute(key, value));
}
/**
* Method for constructing an instance that has no
* value for attribute for given key.
*
* @since 2.3
*/
public T withoutAttribute(Object key) {
return with(getAttributes().withoutSharedAttribute(key));
}
/*
/**********************************************************************
/* Additional shared fluent factory methods; factories
/**********************************************************************
*/
/**
* Method for constructing and returning a new instance with different
* {@link TypeFactory}
* to use.
*/
public final T with(TypeFactory tf) {
return _withBase( _base.withTypeFactory(tf));
}
/**
* Method for constructing and returning a new instance with different
* {@link TypeResolverBuilder} to use.
*/
public final T with(TypeResolverBuilder trb) {
return _withBase(_base.withTypeResolverBuilder(trb));
}
/**
* Method for constructing and returning a new instance with different
* {@link PropertyNamingStrategy}
* to use.
*
* NOTE: make sure to register new instance with ObjectMapper
* if directly calling this method.
*/
public final T with(PropertyNamingStrategy pns) {
return _withBase(_base.withPropertyNamingStrategy(pns));
}
/**
* Method for constructing and returning a new instance with different
* {@link PropertyNamingStrategy}
* to use.
*
* @since 2.12
*/
public final T with(AccessorNamingStrategy.Provider p) {
return _withBase(_base.withAccessorNaming(p));
}
/**
* Method for constructing and returning a new instance with different
* {@link HandlerInstantiator}
* to use.
*
* NOTE: make sure to register new instance with ObjectMapper
* if directly calling this method.
*/
public final T with(HandlerInstantiator hi) {
return _withBase(_base.withHandlerInstantiator(hi));
}
/**
* @since 2.16
*/
public T with(CacheProvider provider) {
return _withBase(_base.with(Objects.requireNonNull(provider)));
}
/*
/**********************************************************************
/* Additional shared fluent factory methods; other
/**********************************************************************
*/
/**
* Method for constructing and returning a new instance with different
* default {@link Base64Variant} to use with base64-encoded binary values.
*/
public final T with(Base64Variant base64) {
return _withBase(_base.with(base64));
}
/**
* Method for constructing and returning a new instance with different
* {@link DateFormat}
* to use.
*
* NOTE: non-final since SerializationConfig needs to override this
*/
public T with(DateFormat df) {
return _withBase(_base.withDateFormat(df));
}
/**
* Method for constructing and returning a new instance with different
* default {@link java.util.Locale} to use for formatting.
*/
public final T with(Locale l) {
return _withBase(_base.with(l));
}
/**
* Method for constructing and returning a new instance with different
* default {@link java.util.TimeZone} to use for formatting of date values.
*/
public final T with(TimeZone tz) {
return _withBase(_base.with(tz));
}
/**
* Method for constructing and returning a new instance with different
* root name to use (none, if null).
*
* Note that when a root name is set to a non-Empty String, this will automatically force use
* of root element wrapping with given name. If empty String passed, will
* disable root name wrapping; and if null used, will instead use
* SerializationFeature to determine if to use wrapping, and annotation
* (or default name) for actual root name to use.
*
* @param rootName to use: if null, means "use default" (clear setting);
* if empty String ("") means that no root name wrapping is used;
* otherwise defines root name to use.
*
* @since 2.6
*/
public abstract T withRootName(PropertyName rootName);
public T withRootName(String rootName) {
if (rootName == null) {
return withRootName((PropertyName) null);
}
return withRootName(PropertyName.construct(rootName));
}
/**
* Method for constructing and returning a new instance with different
* {@link SubtypeResolver}
* to use.
*
* NOTE: make sure to register new instance with ObjectMapper
* if directly calling this method.
*/
public abstract T with(SubtypeResolver str);
/**
* Method for constructing and returning a new instance with different
* view to use.
*/
public abstract T withView(Class view);
/*
/**********************************************************************
/* Simple accessors
/**********************************************************************
*/
@Override
public final DatatypeFeatures getDatatypeFeatures() {
return _datatypeFeatures;
}
/**
* Accessor for object used for finding out all reachable subtypes
* for supertypes; needed when a logical type name is used instead
* of class name (or custom scheme).
*/
@Override
public final SubtypeResolver getSubtypeResolver() {
return _subtypeResolver;
}
/**
* @deprecated Since 2.6 use {@link #getFullRootName} instead.
*/
@Deprecated // since 2.6
public final String getRootName() {
return (_rootName == null) ? null : _rootName.getSimpleName();
}
/**
* @since 2.6
*/
public final PropertyName getFullRootName() {
return _rootName;
}
@Override
public final Class getActiveView() {
return _view;
}
@Override
public final ContextAttributes getAttributes() {
return _attributes;
}
/*
/**********************************************************************
/* Configuration access; default/overrides
/**********************************************************************
*/
@Override
public final ConfigOverride getConfigOverride(Class type) {
ConfigOverride override = _configOverrides.findOverride(type);
return (override == null) ? EMPTY_OVERRIDE : override;
}
@Override
public final ConfigOverride findConfigOverride(Class type) {
return _configOverrides.findOverride(type);
}
@Override
public final JsonInclude.Value getDefaultPropertyInclusion() {
return _configOverrides.getDefaultInclusion();
}
@Override
public final JsonInclude.Value getDefaultPropertyInclusion(Class baseType) {
JsonInclude.Value v = getConfigOverride(baseType).getInclude();
JsonInclude.Value def = getDefaultPropertyInclusion();
if (def == null) {
return v;
}
return def.withOverrides(v);
}
@Override
public final JsonInclude.Value getDefaultInclusion(Class baseType,
Class propertyType) {
JsonInclude.Value v = getConfigOverride(propertyType).getIncludeAsProperty();
JsonInclude.Value def = getDefaultPropertyInclusion(baseType);
if (def == null) {
return v;
}
return def.withOverrides(v);
}
@Override
public final JsonFormat.Value getDefaultPropertyFormat(Class type) {
return _configOverrides.findFormatDefaults(type);
}
@Override
public final JsonIgnoreProperties.Value getDefaultPropertyIgnorals(Class type) {
ConfigOverride overrides = _configOverrides.findOverride(type);
if (overrides != null) {
JsonIgnoreProperties.Value v = overrides.getIgnorals();
if (v != null) {
return v;
}
}
// 01-May-2015, tatu: Could return `Value.empty()` but for now `null`
// seems simpler as callers can avoid processing.
return null;
}
@Override
public final JsonIgnoreProperties.Value getDefaultPropertyIgnorals(Class baseType,
AnnotatedClass actualClass)
{
AnnotationIntrospector intr = getAnnotationIntrospector();
JsonIgnoreProperties.Value base = (intr == null) ? null
: intr.findPropertyIgnoralByName(this, actualClass);
JsonIgnoreProperties.Value overrides = getDefaultPropertyIgnorals(baseType);
return JsonIgnoreProperties.Value.merge(base, overrides);
}
@Override
public final JsonIncludeProperties.Value getDefaultPropertyInclusions(Class baseType,
AnnotatedClass actualClass)
{
AnnotationIntrospector intr = getAnnotationIntrospector();
return (intr == null) ? null : intr.findPropertyInclusionByName(this, actualClass);
}
@Override
public final VisibilityChecker getDefaultVisibilityChecker()
{
VisibilityChecker vchecker = _configOverrides.getDefaultVisibility();
// then global overrides (disabling)
// 05-Mar-2018, tatu: As per [databind#1947], need to see if any disabled
if ((_mapperFeatures & AUTO_DETECT_MASK) != AUTO_DETECT_MASK) {
if (!isEnabled(MapperFeature.AUTO_DETECT_FIELDS)) {
vchecker = vchecker.withFieldVisibility(Visibility.NONE);
}
if (!isEnabled(MapperFeature.AUTO_DETECT_GETTERS)) {
vchecker = vchecker.withGetterVisibility(Visibility.NONE);
}
if (!isEnabled(MapperFeature.AUTO_DETECT_IS_GETTERS)) {
vchecker = vchecker.withIsGetterVisibility(Visibility.NONE);
}
if (!isEnabled(MapperFeature.AUTO_DETECT_SETTERS)) {
vchecker = vchecker.withSetterVisibility(Visibility.NONE);
}
if (!isEnabled(MapperFeature.AUTO_DETECT_CREATORS)) {
vchecker = vchecker.withCreatorVisibility(Visibility.NONE);
}
}
return vchecker;
}
@Override // since 2.9
public final VisibilityChecker getDefaultVisibilityChecker(Class baseType,
AnnotatedClass actualClass)
{
// 14-Apr-2021, tatu: [databind#3117] JDK types should be limited
// to "public-only" regardless of settings for other types
VisibilityChecker vc;
if (ClassUtil.isJDKClass(baseType)) {
vc = VisibilityChecker.Std.allPublicInstance();
} else {
vc = getDefaultVisibilityChecker();
// 20-May-2023, tatu: [databind#3906] Must reset visibility for Records
// to avoid hiding Constructors.
if (ClassUtil.isRecordType(baseType)) {
// But only if creator auto-detection enabled:
if (isEnabled(MapperFeature.AUTO_DETECT_CREATORS)) {
// [databind#4175] Changed Visibility from NON_PRIVATE to DEFAULT since 2.16
vc = vc.withCreatorVisibility(Visibility.DEFAULT);
}
}
}
AnnotationIntrospector intr = getAnnotationIntrospector();
if (intr != null) {
vc = intr.findAutoDetectVisibility(actualClass, vc);
}
ConfigOverride overrides = _configOverrides.findOverride(baseType);
if (overrides != null) {
vc = vc.withOverrides(overrides.getVisibility()); // ok to pass null
}
return vc;
}
@Override
public final JsonSetter.Value getDefaultSetterInfo() {
return _configOverrides.getDefaultSetterInfo();
}
@Override
public Boolean getDefaultMergeable() {
return _configOverrides.getDefaultMergeable();
}
@Override
public Boolean getDefaultMergeable(Class baseType) {
Boolean b;
ConfigOverride cfg = _configOverrides.findOverride(baseType);
if (cfg != null) {
b = cfg.getMergeable();
if (b != null) {
return b;
}
}
return _configOverrides.getDefaultMergeable();
}
/*
/**********************************************************************
/* Other config access
/**********************************************************************
*/
@Override
public PropertyName findRootName(JavaType rootType) {
if (_rootName != null) {
return _rootName;
}
return _rootNames.findRootName(rootType, this);
}
@Override
public PropertyName findRootName(Class rawRootType) {
if (_rootName != null) {
return _rootName;
}
return _rootNames.findRootName(rawRootType, this);
}
/*
/**********************************************************************
/* ClassIntrospector.MixInResolver impl:
/**********************************************************************
*/
/**
* Method that will check if there are "mix-in" classes (with mix-in
* annotations) for given class
*/
@Override
public final Class findMixInClassFor(Class cls) {
return _mixIns.findMixInClassFor(cls);
}
// Not really relevant here (should not get called)
@Override
public MixInResolver copy() {
throw new UnsupportedOperationException();
}
/**
* Test-only method -- does not reflect possibly open-ended set that external
* mix-in resolver might provide.
*/
public final int mixInCount() {
return _mixIns.localSize();
}
}