com.fasterxml.jackson.module.jakarta.xmlbind.JakartaXmlBindAnnotationIntrospector Maven / Gradle / Ivy
Show all versions of jackson-module-jakarta-xmlbind-annotations Show documentation
package com.fasterxml.jackson.module.jakarta.xmlbind;
import java.lang.annotation.Annotation;
import java.lang.reflect.*;
import java.util.*;
import jakarta.xml.bind.JAXBElement;
import jakarta.xml.bind.annotation.*;
import jakarta.xml.bind.annotation.adapters.XmlAdapter;
import jakarta.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import jakarta.xml.bind.annotation.adapters.XmlJavaTypeAdapters;
import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
import com.fasterxml.jackson.annotation.*;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.cfg.MapperConfig;
import com.fasterxml.jackson.databind.introspect.*;
import com.fasterxml.jackson.databind.jsontype.NamedType;
import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;
import com.fasterxml.jackson.databind.jsontype.impl.StdTypeResolverBuilder;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.fasterxml.jackson.databind.util.ClassUtil;
import com.fasterxml.jackson.databind.util.Converter;
import com.fasterxml.jackson.module.jakarta.xmlbind.deser.DataHandlerDeserializer;
import com.fasterxml.jackson.module.jakarta.xmlbind.ser.DataHandlerSerializer;
/**
* Annotation introspector that uses Jakarta Xml Bind annotations
* (nee "JAXB" Annotations") where applicable for jackson-databind to use.
* As of Jackson 2.x, majority of XmlBind annotations are supported
* to some degree.
* Ones that are NOT yet supported are:
*
* - {@link XmlAnyAttribute} not supported; possible (if unlikely) to be used
* (as an alias for {@code @JsonAnySetter})
*
* - {@link XmlAnyElement} not supported; unlikely to ever be supported.
*
* - {@link jakarta.xml.bind.annotation.XmlAttachmentRef}: JSON does not support external attachments
*
- {@link XmlElementDecl}
*
- {@link XmlElementRefs} because Jackson doesn't have any support for 'named' collection items
*
- {@link jakarta.xml.bind.annotation.XmlInlineBinaryData} since the underlying concepts
* (like XOP) do not exist in JSON -- Jackson will always use inline base64 encoding as the method
*
- {@link jakarta.xml.bind.annotation.XmlList} because JSON does not have (or necessarily need)
* method of serializing list of values as space-separated Strings
*
- {@link jakarta.xml.bind.annotation.XmlMimeType}
*
- {@link jakarta.xml.bind.annotation.XmlMixed} since JSON has no concept of mixed content
*
- {@link XmlRegistry} not supported, unlikely to ever be.
*
- {@link XmlSchema} not supported, unlikely to ever be.
*
- {@link XmlSchemaType} not supported, unlikely to ever be.
*
- {@link XmlSchemaTypes} not supported, unlikely to ever be.
*
- {@link XmlSeeAlso} not supported.
*
*
* Note also the following limitations:
*
*
* - Any property annotated with {@link XmlValue} will have implicit property named 'value' on
* its JSON object; although it should be possible to override this name
*
*
*
*/
public class JakartaXmlBindAnnotationIntrospector
extends AnnotationIntrospector
implements AnnotationIntrospector.XmlExtensions, // since 2.13
Versioned
{
private static final long serialVersionUID = -1L;
protected final static String DEFAULT_NAME_FOR_XML_VALUE = "value";
protected final static boolean DEFAULT_IGNORE_XMLIDREF = false;
protected final static String MARKER_FOR_DEFAULT = "##default";
protected final static JsonFormat.Value FORMAT_STRING = new JsonFormat.Value().withShape(JsonFormat.Shape.STRING);
protected final static JsonFormat.Value FORMAT_INT = new JsonFormat.Value().withShape(JsonFormat.Shape.NUMBER_INT);
protected final String _jaxbPackageName;
protected final JsonSerializer _dataHandlerSerializer;
protected final JsonDeserializer _dataHandlerDeserializer;
protected final TypeFactory _typeFactory;
protected final boolean _ignoreXmlIDREF;
/**
* When using {@link XmlValue} annotation, a placeholder name is assigned
* to property (unless overridden by explicit name); this configuration
* value specified what that name is.
*/
protected String _xmlValueName = DEFAULT_NAME_FOR_XML_VALUE;
/**
* Inclusion value to return for properties annotated with
* {@link XmlElement} and {@link XmlElementWrapper}, in case {@code nillable}
* property is left as {@code false}. Default setting is
* {@code null}; this is typically changed to either
* {@link com.fasterxml.jackson.annotation.JsonInclude.Include#NON_NULL}
* or {@link com.fasterxml.jackson.annotation.JsonInclude.Include#NON_EMPTY}.
*
* @since 2.7
*/
protected JsonInclude.Include _nonNillableInclusion = null;
/**
* @deprecated Since 2.1, use constructor that takes TypeFactory.
*/
@Deprecated
public JakartaXmlBindAnnotationIntrospector() {
this(TypeFactory.defaultInstance());
}
public JakartaXmlBindAnnotationIntrospector(MapperConfig config) {
this(config.getTypeFactory());
}
public JakartaXmlBindAnnotationIntrospector(TypeFactory typeFactory) {
this(typeFactory, DEFAULT_IGNORE_XMLIDREF);
}
/**
* @param typeFactory Type factory used for resolving type information
* @param ignoreXmlIDREF Whether {@link XmlIDREF} annotation should be processed
* JAXB style (meaning that references are always serialized using id), or
* not (first reference as full POJO, others as ids)
*/
public JakartaXmlBindAnnotationIntrospector(TypeFactory typeFactory, boolean ignoreXmlIDREF)
{
_typeFactory = (typeFactory == null)? TypeFactory.defaultInstance() : typeFactory;
_ignoreXmlIDREF = ignoreXmlIDREF;
_jaxbPackageName = XmlElement.class.getPackage().getName();
JsonSerializer dataHandlerSerializer = null;
JsonDeserializer dataHandlerDeserializer = null;
/// Data handlers included dynamically, to try to prevent issues on
// platforms with less than complete support for JAXB API
try {
dataHandlerSerializer = (JsonSerializer) DataHandlerSerializer.class.newInstance();
dataHandlerDeserializer = (JsonDeserializer) DataHandlerDeserializer.class.newInstance();
} catch (Throwable e) {
//dataHandlers not supported...
}
_dataHandlerSerializer = dataHandlerSerializer;
_dataHandlerDeserializer = dataHandlerDeserializer;
}
/**
* Method that will return version information stored in and read from jar
* that contains this class.
*/
@Override
public Version version() {
return PackageVersion.VERSION;
}
/*
/**********************************************************************
/* Configuration
/**********************************************************************
*/
/**
* Configuration method that can be used to change default name
* ("value") used for properties annotated with {@link XmlValue};
* note that setting it to null will actually avoid
* name override, and name will instead be derived from underlying
* method name using standard bean name introspection.
*/
public void setNameUsedForXmlValue(String name) {
_xmlValueName = name;
}
/**
* Accessor for getting currently configured placeholder named
* used for property annotated with {@link XmlValue}.
*/
public String getNameUsedForXmlValue() {
return _xmlValueName;
}
/**
* Method to call to change inclusion criteria used for property annotated
* with {@link XmlElement} or {@link XmlElementWrapper}, with nillable
* set as false.
*
* @since 2.7
*/
public JakartaXmlBindAnnotationIntrospector setNonNillableInclusion(JsonInclude.Include incl) {
_nonNillableInclusion = incl;
return this;
}
/**
* @since 2.7
*/
public JsonInclude.Include getNonNillableInclusion() {
return _nonNillableInclusion;
}
/*
/**********************************************************************
/* Extended API: since 2.13, AnnotationIntrospector.XmlExtensions
* (before 2.13: XmlAnnotationIntrospector)
/**********************************************************************
*/
@Override // AnnotationIntrospector.XmlExtensions
public String findNamespace(MapperConfig config, Annotated ann)
{
String ns = null;
if (ann instanceof AnnotatedClass) {
// For classes, it must be @XmlRootElement. Also, we do
// want to use defaults from package, base class
XmlRootElement elem = findRootElementAnnotation((AnnotatedClass) ann);
if (elem != null) {
ns = elem.namespace();
}
} else {
// For others, XmlElement or XmlAttribute work (anything else?)
XmlElement elem = findAnnotation(XmlElement.class, ann, false, false, false);
if (elem != null) {
ns = elem.namespace();
}
if (ns == null || MARKER_FOR_DEFAULT.equals(ns)) {
XmlAttribute attr = findAnnotation(XmlAttribute.class, ann, false, false, false);
if (attr != null) {
ns = attr.namespace();
}
}
}
// JAXB uses marker for "not defined"
if (MARKER_FOR_DEFAULT.equals(ns)) {
ns = null;
}
return ns;
}
/**
* Here we assume fairly simple logic; if there is XmlAttribute to be found,
* we consider it an attribute; if XmlElement, not-an-attribute; and otherwise
* we will consider there to be no information.
* Caller is likely to default to considering things as elements.
*/
@Override // AnnotationIntrospector.XmlExtensions
public Boolean isOutputAsAttribute(MapperConfig config, Annotated ann) {
XmlAttribute attr = findAnnotation(XmlAttribute.class, ann, false, false, false);
if (attr != null) {
return Boolean.TRUE;
}
XmlElement elem = findAnnotation(XmlElement.class, ann, false, false, false);
if (elem != null) {
return Boolean.FALSE;
}
return null;
}
@Override // AnnotationIntrospector.XmlExtensions
public Boolean isOutputAsText(MapperConfig config, Annotated ann) {
XmlValue attr = findAnnotation(XmlValue.class, ann, false, false, false);
if (attr != null) {
return Boolean.TRUE;
}
return null;
}
@Override // AnnotationIntrospector.XmlExtensions
public Boolean isOutputAsCData(MapperConfig config, Annotated ann) {
// JAXB has nothing for this one?
return null;
}
/*
/**********************************************************************
/* General annotations (for classes, properties)
/**********************************************************************
*/
@Override
public ObjectIdInfo findObjectIdInfo(Annotated ann)
{
// To work in the way that works with JAXB and Jackson,
// we need to do things in bit of round-about way, starting
// with AnnotatedClass, locating @XmlID property, if any.
if (!(ann instanceof AnnotatedClass)) {
return null;
}
AnnotatedClass ac = (AnnotatedClass) ann;
/* Ideally, should not have to infer settings for class from
* individual fields and/or methods; but for now this
* has to do ...
*/
PropertyName idPropName = null;
method_loop:
for (AnnotatedMethod m : ac.memberMethods()) {
XmlID idProp = m.getAnnotation(XmlID.class);
if (idProp == null) {
continue;
}
switch (m.getParameterCount()) {
case 0: // getter
idPropName = findJaxbPropertyName(m, m.getRawType(),
_okNameForGetter(m));
break method_loop;
case 1: // setter
idPropName = findJaxbPropertyName(m, m.getRawType(),
_okNameForMutator(m));
break method_loop;
}
}
if (idPropName == null) {
for (AnnotatedField f : ac.fields()) {
XmlID idProp = f.getAnnotation(XmlID.class);
if (idProp != null) {
idPropName = findJaxbPropertyName(f, f.getRawType(), f.getName());
break;
}
}
}
if (idPropName != null) {
/* Scoping... hmmh. Could XML requires somewhat global scope, n'est pas?
* The alternative would be to use declared type of this class.
*/
Class scope = Object.class; // alternatively would use 'ac.getRawType()'
// and we will assume that there exists property thus named...
return new ObjectIdInfo(idPropName,
scope, ObjectIdGenerators.PropertyGenerator.class,
// should we customize Object Id resolver somehow?
SimpleObjectIdResolver.class);
}
return null;
}
@Override
public ObjectIdInfo findObjectReferenceInfo(Annotated ann, ObjectIdInfo base)
{
if (!_ignoreXmlIDREF) {
XmlIDREF idref = ann.getAnnotation(XmlIDREF.class);
/* JAXB makes XmlIDREF mean "always as id", as far as I know.
* May need to make it configurable in future, but for not that
* is fine...
*/
if (idref != null) {
if (base == null) {
base = ObjectIdInfo.empty();
}
base = base.withAlwaysAsId(true);
}
}
return base;
}
/*
/**********************************************************************
/* General class annotations
/**********************************************************************
*/
@Override
public PropertyName findRootName(AnnotatedClass ac)
{
XmlRootElement elem = findRootElementAnnotation(ac);
if (elem != null) {
return _combineNames(elem.name(), elem.namespace(), "");
}
return null;
}
// 28-Jul-2020, tatu: two parts; by-name ignorals have no counterpart in JAXB;
// although "ignore unknown" could map (by default this is what JAXB does).
// But without annotation changing that, not much we can map here
/*
@Override
public JsonIgnoreProperties.Value findPropertyIgnoralByName(MapperConfig config, Annotated ann)
*/
@Override
public Boolean isIgnorableType(AnnotatedClass ac) {
// Does JAXB have any such indicators? No?
return null;
}
/*
/**********************************************************************
/* General member (field, method/constructor) annotations
/**********************************************************************
*/
@Override
public boolean hasIgnoreMarker(AnnotatedMember m) {
return m.getAnnotation(XmlTransient.class) != null;
}
//(ryan) JAXB has @XmlAnyAttribute and @XmlAnyElement annotations, but they're not applicable in this case
// because JAXB says those annotations are only applicable to methods with specific signatures
// that Jackson doesn't support (Jackson's any setter needs 2 arguments, name and value, whereas
// JAXB expects use of Map
// 28-May-2016, tatu: While `@XmlAnyAttribute` looks ALMOST like applicable (esp.
// assuming Jackson could use `Map` field, not just setter/getter), it is alas not.
// The reason is that key is expected to be `QNmae`, XML/JAXB specific name and
// something Jackson does not require or use
/*
@Override
public boolean hasAnySetterAnnotation(AnnotatedMethod am) { }
@Override
public boolean hasAnySetterAnnotation(AnnotatedMethod am)
*/
@Override
public Boolean hasRequiredMarker(AnnotatedMember m) {
// 17-Oct-2017, tatu: [modules-base#32]
// Before 2.9.3, was handling `true` correctly,
// but otherwise used confusing logic (probably in attempt to try to avoid
// reporting not-required for default value case
XmlAttribute attr = m.getAnnotation(XmlAttribute.class);
if (attr != null) {
return attr.required();
}
XmlElement elem = m.getAnnotation(XmlElement.class);
if (elem != null) {
return elem.required();
}
return null;
}
@Override
public PropertyName findWrapperName(Annotated ann)
{
XmlElementWrapper w = findAnnotation(XmlElementWrapper.class, ann, false, false, false);
if (w != null) {
// 18-Sep-2013, tatu: As per [jaxb-annotations#24], need to take special care with empty
// String, as that should indicate here "use underlying unmodified
// property name" (that is, one NOT overridden by @JsonProperty)
PropertyName name = _combineNames(w.name(), w.namespace(), "");
// clumsy, yes, but has to do:
if (!name.hasSimpleName()) {
if (ann instanceof AnnotatedMethod) {
AnnotatedMethod am = (AnnotatedMethod) ann;
String str;
if (am.getParameterCount() == 0) {
str = _okNameForGetter(am);
} else {
str = _okNameForMutator(am);
}
if (str != null) {
return name.withSimpleName(str);
}
}
return name.withSimpleName(ann.getName());
}
return name;
}
return null;
}
@Override
public String findImplicitPropertyName(AnnotatedMember m) {
XmlValue valueInfo = m.getAnnotation(XmlValue.class);
if (valueInfo != null) {
return _xmlValueName;
}
return null;
}
@Override
public JsonFormat.Value findFormat(Annotated m) {
// Use @XmlEnum value (Class) to indicate format, iff it makes sense
if (m instanceof AnnotatedClass) {
XmlEnum ann = m.getAnnotation(XmlEnum.class);
if (ann != null) {
Class type = ann.value();
if (type == String.class || type.isEnum()) {
return FORMAT_STRING;
}
if (Number.class.isAssignableFrom(type)) {
return FORMAT_INT;
}
}
}
return null;
}
/*
/**********************************************************************
/* Property auto-detection
/**********************************************************************
*/
@Override
public VisibilityChecker findAutoDetectVisibility(AnnotatedClass ac,
VisibilityChecker checker)
{
XmlAccessType at = findAccessType(ac);
if (at == null) {
/* JAXB default is "PUBLIC_MEMBER"; however, here we should not
* override settings if there is no annotation -- that would mess
* up global baseline. Fortunately Jackson defaults are very close
* to JAXB 'PUBLIC_MEMBER' settings (considering that setters and
* getters must come in pairs)
*/
return checker;
}
// Note: JAXB does not do creator auto-detection, can (and should) ignore
switch (at) {
case FIELD: // all fields, independent of visibility; no methods
return checker.withFieldVisibility(Visibility.ANY)
.withSetterVisibility(Visibility.NONE)
.withGetterVisibility(Visibility.NONE)
.withIsGetterVisibility(Visibility.NONE)
;
case NONE: // no auto-detection
return checker.withFieldVisibility(Visibility.NONE)
.withSetterVisibility(Visibility.NONE)
.withGetterVisibility(Visibility.NONE)
.withIsGetterVisibility(Visibility.NONE)
;
case PROPERTY:
return checker.withFieldVisibility(Visibility.NONE)
.withSetterVisibility(Visibility.PUBLIC_ONLY)
.withGetterVisibility(Visibility.PUBLIC_ONLY)
.withIsGetterVisibility(Visibility.PUBLIC_ONLY)
;
case PUBLIC_MEMBER:
return checker.withFieldVisibility(Visibility.PUBLIC_ONLY)
.withSetterVisibility(Visibility.PUBLIC_ONLY)
.withGetterVisibility(Visibility.PUBLIC_ONLY)
.withIsGetterVisibility(Visibility.PUBLIC_ONLY)
;
}
return checker;
}
/**
* Method for locating JAXB {@link XmlAccessType} annotation value
* for given annotated entity, if it has one, or inherits one from
* its ancestors (in JAXB sense, package etc). Returns null if
* nothing has been explicitly defined.
*/
protected XmlAccessType findAccessType(Annotated ac)
{
XmlAccessorType at = findAnnotation(XmlAccessorType.class, ac, true, true, true);
return (at == null) ? null : at.value();
}
/*
/**********************************************************************
/* Class annotations for Polymorphic type handling
/**********************************************************************
*/
@Override
public TypeResolverBuilder findTypeResolver(MapperConfig config,
AnnotatedClass ac, JavaType baseType)
{
// no per-class type resolvers, right?
return null;
}
@Override
public TypeResolverBuilder findPropertyTypeResolver(MapperConfig config,
AnnotatedMember am, JavaType baseType)
{
// First: @XmlElements and @XmlElementRefs only applies type for immediate property, if it
// is NOT a structured type.
if (baseType.isContainerType()) return null;
return _typeResolverFromXmlElements(am);
}
@Override
public TypeResolverBuilder findPropertyContentTypeResolver(MapperConfig config,
AnnotatedMember am, JavaType containerType)
{
// First: let's ensure property is a container type: caller should have
// verified but just to be sure
if (containerType.getContentType() == null) {
throw new IllegalArgumentException("Must call method with a container or reference type (got "+containerType+")");
}
return _typeResolverFromXmlElements(am);
}
protected TypeResolverBuilder _typeResolverFromXmlElements(AnnotatedMember am)
{
/* If simple type, @XmlElements and @XmlElementRefs are applicable.
* Note: @XmlElement and @XmlElementRef are NOT handled here, since they
* are handled specifically as non-polymorphic indication
* of the actual type
*/
XmlElements elems = findAnnotation(XmlElements.class, am, false, false, false);
XmlElementRefs elemRefs = findAnnotation(XmlElementRefs.class, am, false, false, false);
if (elems == null && elemRefs == null) {
return null;
}
TypeResolverBuilder b = new StdTypeResolverBuilder();
// JAXB always uses type name as id
b = b.init(JsonTypeInfo.Id.NAME, null);
// and let's consider WRAPPER_OBJECT to be canonical inclusion method
b = b.inclusion(JsonTypeInfo.As.WRAPPER_OBJECT);
return b;
}
@Override
public List findSubtypes(Annotated a)
{
// No package/superclass defaulting (only used with fields, methods)
XmlElements elems = findAnnotation(XmlElements.class, a, false, false, false);
ArrayList result = null;
if (elems != null) {
result = new ArrayList();
for (XmlElement elem : elems.value()) {
String name = elem.name();
if (MARKER_FOR_DEFAULT.equals(name)) name = null;
result.add(new NamedType(elem.type(), name));
}
} else {
XmlElementRefs elemRefs = findAnnotation(XmlElementRefs.class, a, false, false, false);
if (elemRefs != null) {
result = new ArrayList();
for (XmlElementRef elemRef : elemRefs.value()) {
Class refType = elemRef.type();
// only good for types other than JAXBElement (which is XML based)
if (!JAXBElement.class.isAssignableFrom(refType)) {
// first consider explicit name declaration
String name = elemRef.name();
if (name == null || MARKER_FOR_DEFAULT.equals(name)) {
XmlRootElement rootElement = (XmlRootElement) refType.getAnnotation(XmlRootElement.class);
if (rootElement != null) {
name = rootElement.name();
}
}
if (name == null || MARKER_FOR_DEFAULT.equals(name)) {
name = _decapitalize(refType.getSimpleName());
}
result.add(new NamedType(refType, name));
}
}
}
}
// Check @XmlSeeAlso as well.
/* 17-Aug-2012, tatu: But wait! For structured type, what we really is
* value (content) type!
* If code below does not make full (or any) sense, do not despair -- it
* is wrong. Yet it works. The call sequence before we get here is mangled,
* its logic twisted... but as Dire Straits put it: "That ain't working --
* that's The Way You Do It!"
*/
XmlSeeAlso ann = a.getAnnotation(XmlSeeAlso.class);
if (ann != null) {
if (result == null) {
result = new ArrayList();
}
for (Class cls : ann.value()) {
result.add(new NamedType(cls));
}
}
return result;
}
@Override
public String findTypeName(AnnotatedClass ac) {
XmlType type = findAnnotation(XmlType.class, ac, false, false, false);
if (type != null) {
String name = type.name();
if (!MARKER_FOR_DEFAULT.equals(name)) return name;
}
return null;
}
/*
/**********************************************************************
/* Serialization: general annotations
/**********************************************************************
*/
@Override
public JsonSerializer findSerializer(Annotated am)
{
final Class type = _rawSerializationType(am);
/*
XmlAdapter adapter = findAdapter(am, true, type);
if (adapter != null) {
boolean fromClass = !(am instanceof AnnotatedMember);
// Ugh. Must match to see if adapter's bounded type (result to map to) matches property type
if (isContainerType(type)) {
Class bt = findAdapterBoundType(adapter);
if (bt.isAssignableFrom(type)) {
return new XmlAdapterJsonSerializer(adapter, fromClass);
}
// Note: if used for value type, handled in different place
} else {
return new XmlAdapterJsonSerializer(adapter, fromClass);
}
}
*/
// Add support for additional core XML types needed by JAXB
if (type != null) {
if (_dataHandlerSerializer != null && isDataHandler(type)) {
return _dataHandlerSerializer;
}
}
return null;
}
/**
* Determines whether the type is assignable to class jakarta.activation.DataHandler without requiring that class
* to be on the classpath.
*
* @param type The type.
* @return Whether the type is assignable to class jakarta.activation.DataHandler
*/
private boolean isDataHandler(Class type)
{
return type != null && (Object.class != type)
&& (("jakarta.activation.DataHandler".equals(type.getName()) || isDataHandler(type.getSuperclass())));
}
@Override
public Object findContentSerializer(Annotated a) {
return null;
}
@Override // @since 2.7
public JsonInclude.Value findPropertyInclusion(Annotated a)
{
JsonInclude.Include incl = _serializationInclusion(a, null);
if (incl == null) {
return JsonInclude.Value.empty();
}
return JsonInclude.Value.construct(incl, null);
}
JsonInclude.Include _serializationInclusion(Annotated a, JsonInclude.Include defValue)
{
XmlElementWrapper w = a.getAnnotation(XmlElementWrapper.class);
if (w != null) {
if (w.nillable()) {
return JsonInclude.Include.ALWAYS;
}
// [jaxb-annotations#52]: Allow specifying inclusion for `nillable=false` too
if (_nonNillableInclusion != null) {
return _nonNillableInclusion;
}
}
XmlElement e = a.getAnnotation(XmlElement.class);
if (e != null) {
if (e.nillable()) {
return JsonInclude.Include.ALWAYS;
}
// [jaxb-annotations#52]: Allow specifying inclusion for `nillable=false` too
if (_nonNillableInclusion != null) {
return _nonNillableInclusion;
}
}
//better pass default value through, if no explicit direction indicating otherwise
return defValue;
}
@Override // @since 2.7
public JavaType refineSerializationType(final MapperConfig config,
final Annotated a, final JavaType baseType) throws JsonMappingException
{
Class serClass = _getTypeFromXmlElement(a);
if (serClass == null) {
return baseType;
}
// First, JAXB has no annotations for key type, so can skip that part (wrt std annotations)
// But the meaning of main annotation(s) varies between container/non-container types
final TypeFactory tf = config.getTypeFactory();
if (baseType.getContentType() == null) { // non-container/-structured types, usually scalar:
// 27-Nov-2015, tatu: Since JAXB has just one annotation, must ignore it in
// one direction, typically serialization (but not always):
if (!serClass.isAssignableFrom(baseType.getRawClass())) {
return baseType;
}
if (baseType.hasRawClass(serClass)) {
// 30-Nov-2015, tatu: As per [databind#1023], need to allow forcing of
// static typing this way
return baseType.withStaticTyping();
}
try {
return tf.constructGeneralizedType(baseType, serClass);
} catch (IllegalArgumentException iae) {
throw new JsonMappingException(null,
String.format("Failed to widen type %s with annotation (value %s), from '%s': %s",
baseType, serClass.getName(), a.getName(), iae.getMessage()),
iae);
}
} else {
// Otherwise, structured type:
JavaType contentType = baseType.getContentType();
if (contentType != null) { // collection[like], map[like], array, reference
// as per earlier, may need to ignore annotation meant for deserialization
if (!serClass.isAssignableFrom(contentType.getRawClass())) {
return baseType;
}
// And then value types for all containers:
if (contentType.hasRawClass(serClass)) {
contentType = contentType.withStaticTyping();
} else {
try {
contentType = tf.constructGeneralizedType(contentType, serClass);
} catch (IllegalArgumentException iae) {
throw new JsonMappingException(null,
String.format("Failed to widen value type of %s with concrete-type annotation (value %s), from '%s': %s",
baseType, serClass.getName(), a.getName(), iae.getMessage()),
iae);
}
}
return baseType.withContentType(contentType);
}
}
return baseType;
}
/*
/**********************************************************************
/* Serialization: class annotations
/**********************************************************************
*/
@Override
public String[] findSerializationPropertyOrder(AnnotatedClass ac)
{
// @XmlType.propOrder fits the bill here:
XmlType type = findAnnotation(XmlType.class, ac, true, true, true);
if (type == null) {
return null;
}
String[] order = type.propOrder();
if (order == null || order.length == 0) {
return null;
}
return order;
}
@Override
public Boolean findSerializationSortAlphabetically(Annotated ann) {
return _findAlpha(ann);
}
private final Boolean _findAlpha(Annotated ann) {
XmlAccessorOrder order = findAnnotation(XmlAccessorOrder.class, ann, true, true, true);
return (order == null) ? null : (order.value() == XmlAccessOrder.ALPHABETICAL);
}
@Override
public Object findSerializationConverter(Annotated a)
{
Class serType = _rawSerializationType(a);
// Can apply to both container and regular type; no difference yet here
XmlAdapter adapter = findAdapter(a, true, serType);
if (adapter != null) {
return _converter(adapter, true);
}
return null;
}
@Override
public Object findSerializationContentConverter(AnnotatedMember a)
{
// But this one only applies to structured (container) types:
Class serType = _rawSerializationType(a);
if (isContainerType(serType)) {
XmlAdapter adapter = _findContentAdapter(a, true);
if (adapter != null) {
return _converter(adapter, true);
}
}
return null;
}
/*
/**********************************************************************
/* Serialization: property annotations
/**********************************************************************
*/
@Override
public PropertyName findNameForSerialization(Annotated a)
{
// 16-Sep-2016, tatu: Prior to 2.9 logic her more complicated, on assumption
// that visibility rules may require return of "" if method/field visible;
// however, that is not required and causes issues so... now simpler:
if (a instanceof AnnotatedMethod) {
AnnotatedMethod am = (AnnotatedMethod) a;
return isVisible(am)
? findJaxbPropertyName(am, am.getRawType(), _okNameForGetter(am))
: null;
}
if (a instanceof AnnotatedField) {
AnnotatedField af = (AnnotatedField) a;
return isVisible(af)
? findJaxbPropertyName(af, af.getRawType(), null)
: null;
}
return null;
}
// As per above, nothing to detect here either...?
/*
@Override
public Boolean findAsValueAnnotation(Annotated a) {
}
*/
@Deprecated // since 2.16
@Override // since 2.7
public String[] findEnumValues(Class enumType, Enum[] enumValues, String[] names) {
HashMap expl = null;
for (Field f : enumType.getDeclaredFields()) {
if (!f.isEnumConstant()) {
continue;
}
XmlEnumValue enumValue = f.getAnnotation(XmlEnumValue.class);
if (enumValue == null) {
continue;
}
String n = enumValue.value();
if (n.isEmpty()) {
continue;
}
if (expl == null) {
expl = new HashMap();
}
expl.put(f.getName(), n);
}
// and then stitch them together if and as necessary
if (expl != null) {
for (int i = 0, end = enumValues.length; i < end; ++i) {
String defName = enumValues[i].name();
String explValue = expl.get(defName);
if (explValue != null) {
names[i] = explValue;
}
}
}
return names;
}
/**
* @see JacksonAnnotationIntrospector#findEnumValues(MapperConfig, AnnotatedClass, Enum[], String[])
* @since 2.16
*/
@Override
public String[] findEnumValues(MapperConfig config, AnnotatedClass annotatedClass,
Enum[] enumValues, String[] names)
{
Map enumToPropertyMap = new LinkedHashMap();
for (AnnotatedField field : annotatedClass.fields()) {
XmlEnumValue property = field.getAnnotation(XmlEnumValue.class);
if (property != null) {
String propValue = property.value();
if (propValue != null && !propValue.isEmpty()) {
enumToPropertyMap.put(field.getName(), propValue);
}
}
}
// and then stitch them together if and as necessary
for (int i = 0, end = enumValues.length; i < end; ++i) {
String defName = enumValues[i].name();
String explValue = enumToPropertyMap.get(defName);
if (explValue != null) {
names[i] = explValue;
}
}
return names;
}
/*
/**********************************************************************
/* Deserialization: general annotations
/**********************************************************************
*/
@Override
public Object findDeserializer(Annotated am)
{
final Class type = _rawDeserializationType(am);
// Add support for additional core XML types needed by JAXB
if (type != null) {
if (_dataHandlerDeserializer != null && isDataHandler(type)) {
return _dataHandlerDeserializer;
}
}
return null;
}
@Override
public Object findKeyDeserializer(Annotated am) {
// Is there something like this in JAXB?
return null;
}
@Override
public Object findContentDeserializer(Annotated a) {
return null;
}
protected Class _doFindDeserializationType(Annotated a, JavaType baseType)
{
// @XmlJavaTypeAdapter will complicate handling of type information;
// basically we better just ignore type we might find here altogether in that case
if (a.hasAnnotation(XmlJavaTypeAdapter.class)) {
return null;
}
// false for class, package, super-class, since annotation can
// only be attached to fields and methods
XmlElement annotation = findAnnotation(XmlElement.class, a, false, false, false);
if (annotation != null) {
Class type = annotation.type();
if (type != XmlElement.DEFAULT.class) {
return type;
}
}
return null;
}
// @since 2.7
@Override
public JavaType refineDeserializationType(final MapperConfig config,
final Annotated a, final JavaType baseType) throws JsonMappingException
{
Class deserClass = _getTypeFromXmlElement(a);
if (deserClass == null) {
return baseType;
}
final TypeFactory tf = config.getTypeFactory();
if (baseType.getContentType() == null) { // non-container/-structured types, usually scalar:
if (baseType.hasRawClass(deserClass)) { // no change
return baseType;
}
// 27-Nov-2015, tatu: Since JAXB has just one annotation, must ignore it in
// one direction, typically serialization (but not always):
if (!baseType.getRawClass().isAssignableFrom(deserClass)) {
return baseType;
}
try {
return tf.constructSpecializedType(baseType, deserClass);
} catch (IllegalArgumentException iae) {
throw new JsonMappingException(null,
String.format("Failed to narrow type %s with annotation (value %s), from '%s': %s",
baseType, deserClass.getName(), a.getName(), iae.getMessage()),
iae);
}
} else {
// Otherwise, structured type:
JavaType contentType = baseType.getContentType();
if (contentType != null) { // collection[like], map[like], array, reference
// as per earlier, may need to ignore annotation meant for deserialization
if (!contentType.getRawClass().isAssignableFrom(deserClass)) {
return baseType;
}
// And then value types for all containers:
try {
contentType = tf.constructSpecializedType(contentType, deserClass);
return baseType.withContentType(contentType);
} catch (IllegalArgumentException iae) {
throw new JsonMappingException(null,
String.format("Failed to narrow type %s with annotation (value %s), from '%s': %s",
baseType, deserClass.getName(), a.getName(), iae.getMessage()),
iae);
}
}
}
return baseType;
}
/*
/**********************************************************************
/* Deserialization: property annotations
/**********************************************************************
*/
@Override
public PropertyName findNameForDeserialization(Annotated a)
{
// 16-Sep-2016, tatu: Prior to 2.9 logic her more complicated, on assumption
// that visibility rules may require return of "" if method/fied visible;
// however, that is not required and causes issues so... now simpler:
if (a instanceof AnnotatedMethod) {
AnnotatedMethod am = (AnnotatedMethod) a;
if (!isVisible(am)) {
return null;
}
Class rawType = am.getRawParameterType(0);
return findJaxbPropertyName(am, rawType, _okNameForMutator(am));
}
if (a instanceof AnnotatedField) {
AnnotatedField af = (AnnotatedField) a;
return isVisible(af)
? findJaxbPropertyName(af, af.getRawType(), null)
: null;
}
return null;
}
@Override
public Object findDeserializationConverter(Annotated a)
{
// One limitation: for structured types this is done later on
Class deserType = _rawDeserializationType(a);
if (isContainerType(deserType)) {
XmlAdapter adapter = findAdapter(a, true, deserType);
if (adapter != null) {
return _converter(adapter, false);
}
} else {
XmlAdapter adapter = findAdapter(a, true, deserType);
if (adapter != null) {
return _converter(adapter, false);
}
}
return null;
}
@Override
public Object findDeserializationContentConverter(AnnotatedMember a)
{
// conversely, here we only apply this to container types:
Class deserType = _rawDeserializationType(a);
if (isContainerType(deserType)) {
XmlAdapter adapter = _findContentAdapter(a, false);
if (adapter != null) {
return _converter(adapter, false);
}
}
return null;
}
/*
/**********************************************************************
/* Helper methods (non-API)
/**********************************************************************
*/
/**
* Whether the specified field is invisible, per the JAXB visibility rules.
*
* @param f The field.
* @return Whether the field is invisible.
*/
private boolean isVisible(AnnotatedField f)
{
// TODO: use AnnotatedField's annotations directly
for (Annotation annotation : f.getAnnotated().getDeclaredAnnotations()) {
if (isJAXBAnnotation(annotation)) {
return true;
}
}
XmlAccessType accessType = XmlAccessType.PUBLIC_MEMBER;
XmlAccessorType at = findAnnotation(XmlAccessorType.class, f, true, true, true);
if (at != null) {
accessType = at.value();
}
if (accessType == XmlAccessType.FIELD) {
return true;
}
if (accessType == XmlAccessType.PUBLIC_MEMBER) {
return Modifier.isPublic(f.getAnnotated().getModifiers());
}
return false;
}
private boolean isVisible(AnnotatedMethod m)
{
// TODO: use AnnotatedField's annotations directly
for (Annotation annotation : m.getAnnotated().getDeclaredAnnotations()) {
if (isJAXBAnnotation(annotation)) {
return true;
}
}
XmlAccessType accessType = XmlAccessType.PUBLIC_MEMBER;
XmlAccessorType at = findAnnotation(XmlAccessorType.class, m, true, true, true);
if (at != null) {
accessType = at.value();
}
if (accessType == XmlAccessType.PROPERTY || accessType == XmlAccessType.PUBLIC_MEMBER) {
return Modifier.isPublic(m.getModifiers());
}
return false;
}
/**
* Finds an annotation associated with given annotatable thing; or if
* not found, a default annotation it may have (from super class, package
* and so on)
*
* @param annotationClass the annotation class.
* @param annotated The annotated element.
* @param includePackage Whether the annotation can be found on the package of the annotated element.
* @param includeClass Whether the annotation can be found on the class of the annotated element.
* @param includeSuperclasses Whether the annotation can be found on any superclasses of the class of the annotated element.
* @return The annotation, or null if not found.
*/
private A findAnnotation(Class annotationClass, Annotated annotated,
boolean includePackage, boolean includeClass, boolean includeSuperclasses)
{
A annotation = annotated.getAnnotation(annotationClass);
if (annotation != null) {
return annotation;
}
Class memberClass = null;
/* 13-Feb-2011, tatu: need to handle AnnotatedParameter
* bit differently, since there is no JDK counterpart. We can still
* access annotations directly, just using different calls.
*/
if (annotated instanceof AnnotatedParameter) {
memberClass = ((AnnotatedParameter) annotated).getDeclaringClass();
} else {
AnnotatedElement annType = annotated.getAnnotated();
if (annType instanceof Member) {
memberClass = ((Member) annType).getDeclaringClass();
if (includeClass) {
annotation = (A) memberClass.getAnnotation(annotationClass);
if (annotation != null) {
return annotation;
}
}
} else if (annType instanceof Class) {
memberClass = (Class) annType;
// 20-Oct-2017, tatu: as per [modules-base#31] we may get `VirtualAnnotatedMember`, should
// not freak out
/*
} else {
throw new IllegalStateException("Unsupported annotated member: " + annotated.getClass().getName());
*/
}
}
if (memberClass != null) {
if (includeSuperclasses) {
Class superclass = memberClass.getSuperclass();
while (superclass != null && superclass != Object.class) {
annotation = (A) superclass.getAnnotation(annotationClass);
if (annotation != null) {
return annotation;
}
superclass = superclass.getSuperclass();
}
}
if (includePackage) {
Package pkg = memberClass.getPackage();
if (pkg != null) {
return memberClass.getPackage().getAnnotation(annotationClass);
}
}
}
return null;
}
/*
/**********************************************************************
/* Helper methods for bean property introspection
/**********************************************************************
*/
/**
* An annotation is handled if it's in the same package as @XmlElement, including subpackages.
*
* @param ann The annotation.
* @return Whether the annotation is in the JAXB package.
*/
protected boolean isJAXBAnnotation(Annotation ann)
{
/* note: class we want is the annotation class, not instance
* (since annotation instances, like enums, may be of different
* physical type!)
*/
Class cls = ann.annotationType();
Package pkg = cls.getPackage();
String pkgName = (pkg != null) ? pkg.getName() : cls.getName();
if (pkgName.startsWith(_jaxbPackageName)) {
return true;
}
return false;
}
private PropertyName findJaxbPropertyName(Annotated ae, Class aeType, String defaultName)
{
XmlAttribute attribute = ae.getAnnotation(XmlAttribute.class);
if (attribute != null) {
return _combineNames(attribute.name(), attribute.namespace(), defaultName);
}
XmlElement element = ae.getAnnotation(XmlElement.class);
if (element != null) {
return _combineNames(element.name(), element.namespace(), defaultName);
}
XmlElementRef elementRef = ae.getAnnotation(XmlElementRef.class);
boolean hasAName = (elementRef != null);
if (hasAName) {
if (!MARKER_FOR_DEFAULT.equals(elementRef.name())) {
return _combineNames(elementRef.name(), elementRef.namespace(), defaultName);
}
if (aeType != null) {
XmlRootElement rootElement = (XmlRootElement) aeType.getAnnotation(XmlRootElement.class);
if (rootElement != null) {
String name = rootElement.name();
if (!MARKER_FOR_DEFAULT.equals(name)) {
return _combineNames(name, rootElement.namespace(), defaultName);
}
// Is there a namespace there to use? Probably not?
return new PropertyName(_decapitalize(aeType.getSimpleName()));
}
}
}
if (!hasAName) {
hasAName = ae.hasAnnotation(XmlElementWrapper.class)
// [modules-base#44]: should consider this as implicit marker
|| ae.hasAnnotation(XmlElements.class)
// 09-Aug-2014, tatu: Note: prior to 2.4.2, we used to give explicit name "value"
// if there was "@XmlValue" annotation; since then, only implicit name.
|| ae.hasAnnotation(XmlValue.class)
;
}
// One more thing:
return hasAName ? PropertyName.USE_DEFAULT : null;
}
private static PropertyName _combineNames(String localName, String namespace,
String defaultName)
{
if (MARKER_FOR_DEFAULT.equals(localName)) {
if (MARKER_FOR_DEFAULT.equals(namespace)) {
return new PropertyName(defaultName);
}
return new PropertyName(defaultName, namespace);
}
if (MARKER_FOR_DEFAULT.equals(namespace)) {
return new PropertyName(localName);
}
return new PropertyName(localName, namespace);
}
private XmlRootElement findRootElementAnnotation(AnnotatedClass ac)
{
// Yes, check package, no class (already included), yes superclasses
return findAnnotation(XmlRootElement.class, ac, true, false, true);
}
/**
* Finds the XmlAdapter for the specified annotation.
*
* @param am The annotated element.
* @param forSerialization If true, adapter for serialization; if false, for deserialization
* @param type
*
* @return The adapter, or null if none.
*/
private XmlAdapter findAdapter(Annotated am, boolean forSerialization,
Class type)
{
// First of all, are we looking for annotations for class?
if (am instanceof AnnotatedClass) {
return findAdapterForClass((AnnotatedClass) am, forSerialization);
}
// Otherwise for a member. First, let's figure out type of property
XmlJavaTypeAdapter adapterInfo = findAnnotation(XmlJavaTypeAdapter.class, am, true, false, false);
if (adapterInfo != null) {
XmlAdapter adapter = checkAdapter(adapterInfo, type, forSerialization);
if (adapter != null) {
return adapter;
}
}
XmlJavaTypeAdapters adapters = findAnnotation(XmlJavaTypeAdapters.class, am, true, false, false);
if (adapters != null) {
for (XmlJavaTypeAdapter info : adapters.value()) {
XmlAdapter adapter = checkAdapter(info, type, forSerialization);
if (adapter != null) {
return adapter;
}
}
}
return null;
}
@SuppressWarnings("unchecked")
private final XmlAdapter checkAdapter(XmlJavaTypeAdapter adapterInfo, Class typeNeeded,
boolean forSerialization)
{
// if annotation has no type, it's applicable; if it has, must match
Class adaptedType = adapterInfo.type();
if (adaptedType == XmlJavaTypeAdapter.DEFAULT.class) {
JavaType type = _typeFactory.constructType(adapterInfo.value());
JavaType[] params = _typeFactory.findTypeParameters(type, XmlAdapter.class);
adaptedType = params[1].getRawClass();
}
if (adaptedType.isAssignableFrom(typeNeeded)) {
@SuppressWarnings("rawtypes")
Class cls = adapterInfo.value();
// true -> yes, force access if need be
return ClassUtil.createInstance(cls, true);
}
return null;
}
@SuppressWarnings("unchecked")
private XmlAdapter findAdapterForClass(AnnotatedClass ac, boolean forSerialization)
{
/* XmlJavaTypeAdapter should not be inherited from super-class.
* It would still be nice to be able to use mix-ins; but unfortunately we seem to lose
* knowledge of class that actually declared the annotation. Thus, we'll only accept
* declaration from specific class itself.
*/
XmlJavaTypeAdapter adapterInfo = ac.getAnnotated().getAnnotation(XmlJavaTypeAdapter.class);
if (adapterInfo != null) { // should we try caching this?
@SuppressWarnings("rawtypes")
Class cls = adapterInfo.value();
// true -> yes, force access if need be
return ClassUtil.createInstance(cls, true);
}
return null;
}
protected final TypeFactory getTypeFactory() {
return _typeFactory;
}
/**
* Helper method used to distinguish structured types (arrays, Lists, Maps),
* which with JAXB use different rules for defining content types.
*/
private boolean isContainerType(Class raw)
{
return raw.isArray() || Collection.class.isAssignableFrom(raw)
|| Map.class.isAssignableFrom(raw);
}
private boolean adapterTypeMatches(XmlAdapter adapter, Class targetType)
{
return findAdapterBoundType(adapter).isAssignableFrom(targetType);
}
private Class findAdapterBoundType(XmlAdapter adapter)
{
TypeFactory tf = getTypeFactory();
JavaType adapterType = tf.constructType(adapter.getClass());
JavaType[] params = tf.findTypeParameters(adapterType, XmlAdapter.class);
// should not happen, except if our type resolution has a flaw, but:
if (params == null || params.length < 2) {
return Object.class;
}
return params[1].getRawClass();
}
protected XmlAdapter _findContentAdapter(Annotated ann,
boolean forSerialization)
{
Class rawType = forSerialization ?
_rawSerializationType(ann) : _rawDeserializationType(ann);
// and let's assume this only applies as member annotation:
if (isContainerType(rawType) && (ann instanceof AnnotatedMember)) {
AnnotatedMember member = (AnnotatedMember) ann;
JavaType fullType = forSerialization ?
_fullSerializationType(member) : _fullDeserializationType(member);
Class contentType = fullType.getContentType().getRawClass();
XmlAdapter adapter = findAdapter(member, forSerialization, contentType);
if (adapter != null && adapterTypeMatches(adapter, contentType)) {
return adapter;
}
}
return null;
}
protected String _propertyNameToString(PropertyName n)
{
return (n == null) ? null : n.getSimpleName();
}
protected Class _rawDeserializationType(Annotated a)
{
if (a instanceof AnnotatedMethod) {
AnnotatedMethod am = (AnnotatedMethod) a;
// 27-Nov-2012, tatu: Bit nasty, as we are assuming
// things about method signatures here... but has to do
if (am.getParameterCount() == 1) {
return am.getRawParameterType(0);
}
}
return a.getRawType();
}
protected JavaType _fullDeserializationType(AnnotatedMember am)
{
if (am instanceof AnnotatedMethod) {
AnnotatedMethod method = (AnnotatedMethod) am;
// 27-Nov-2012, tatu: Bit nasty, as we are assuming
// things about method signatures here... but has to do
if (method.getParameterCount() == 1) {
return ((AnnotatedMethod) am).getParameterType(0);
}
}
return am.getType();
}
protected Class _rawSerializationType(Annotated a)
{
// 27-Nov-2012, tatu: No work-arounds needed yet...
return a.getRawType();
}
protected JavaType _fullSerializationType(AnnotatedMember am) {
return am.getType();
}
protected Converter _converter(XmlAdapter adapter, boolean forSerialization)
{
TypeFactory tf = getTypeFactory();
JavaType adapterType = tf.constructType(adapter.getClass());
JavaType[] pt = tf.findTypeParameters(adapterType, XmlAdapter.class);
// Order of type parameters for Converter is reverse between serializer, deserializer,
// whereas JAXB just uses single ordering
if (forSerialization) {
return new AdapterConverter(adapter, pt[1], pt[0], forSerialization);
}
return new AdapterConverter(adapter, pt[0], pt[1], forSerialization);
}
protected Class _getTypeFromXmlElement(Annotated a) {
XmlElement annotation = findAnnotation(XmlElement.class, a, false, false, false);
if (annotation != null) {
// Further, JAXB has peculiar notion of declaring intermediate (and, for the
// most part, useless) type... So basically we betterjust ignore type if there
// is adapter annotation (we could check to see if intermediate type is compatible,
// but let's not yet bother)
if (a.getAnnotation(XmlJavaTypeAdapter.class) != null) {
return null;
}
Class type = annotation.type();
if (type != XmlElement.DEFAULT.class) {
return type;
}
}
return null;
}
/*
/**********************************************************************
/* Name-mangling support extracted from jackson-databind as of
/* 2.12 (due to databind refactoring).
/* Somewhat simplified, always use "standard" bean name mangling
/* and do not allow alternate prefixes
/**********************************************************************
*/
protected String _okNameForGetter(AnnotatedMethod am) {
final String name = am.getName();
if (name.startsWith("is")) { // plus, must return a boolean
Class rt = am.getRawType();
if (rt == Boolean.class || rt == Boolean.TYPE) {
return _stdManglePropertyName(name, 2);
}
}
if (name.startsWith("get")) {
return _stdManglePropertyName(name, 3);
}
return null;
}
protected String _okNameForMutator(AnnotatedMethod am) {
final String name = am.getName();
if (name.startsWith("set")) {
return _stdManglePropertyName(name, 3);
}
return null;
}
protected String _stdManglePropertyName(final String basename, final int offset)
{
final int end = basename.length();
if (end == offset) { // empty name, nope
return null;
}
// first: if it doesn't start with capital, return as-is
char c0 = basename.charAt(offset);
char c1 = Character.toLowerCase(c0);
if (c0 == c1) {
return basename.substring(offset);
}
// 17-Dec-2014, tatu: As per [databind#653], need to follow more
// closely Java Beans spec; specifically, if two first are upper-case,
// then no lower-casing should be done.
if ((offset + 1) < end) {
if (Character.isUpperCase(basename.charAt(offset+1))) {
return basename.substring(offset);
}
}
StringBuilder sb = new StringBuilder(end - offset);
sb.append(c1);
sb.append(basename, offset+1, end);
return sb.toString();
}
// 02-Nov-2020, tatu: Does not seem to be covered by any unit tests that
// fail if we simply returned "name" as-is.... ?!
// @since 2.12: to remove `java.beans.Introspector.decapitalize(...)` dependency
protected String _decapitalize(String name) {
if (name.length() > 0) {
final char firstOrig = name.charAt(0);
final char firstLC = Character.toLowerCase(firstOrig);
// Lower-case first character if not already lower-case and
// is not followed by another upper-case character
if (firstOrig != firstLC) {
if (name.length() == 1) {
return String.valueOf(firstLC);
}
if (!Character.isUpperCase(name.charAt(1))) {
char chars[] = name.toCharArray();
chars[0] = Character.toLowerCase(chars[0]);
return new String(chars);
}
}
}
return name;
}
}