com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair Maven / Gradle / Ivy
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package com.fasterxml.jackson.databind.introspect;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.Version;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.cfg.MapperConfig;
import com.fasterxml.jackson.databind.jsontype.NamedType;
import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;
import com.fasterxml.jackson.databind.util.ClassUtil;
import com.fasterxml.jackson.databind.util.NameTransformer;
/**
* Helper class that allows using 2 introspectors such that one
* introspector acts as the primary one to use; and second one
* as a fallback used if the primary does not provide conclusive
* or useful result for a method.
*
* An obvious consequence of priority is that it is easy to construct
* longer chains of introspectors by linking multiple pairs.
* Currently most likely combination is that of using the default
* Jackson provider, along with JAXB annotation introspector.
*
* Note: up until 2.0, this class was an inner class of
* {@link AnnotationIntrospector}; moved here for convenience.
*
* @since 2.1
*/
public class AnnotationIntrospectorPair
extends AnnotationIntrospector
implements java.io.Serializable
{
private static final long serialVersionUID = 1L;
protected final AnnotationIntrospector _primary, _secondary;
public AnnotationIntrospectorPair(AnnotationIntrospector p, AnnotationIntrospector s)
{
_primary = p;
_secondary = s;
}
@Override
public Version version() {
return _primary.version();
}
/**
* Helper method for constructing a Pair from two given introspectors (if
* neither is null); or returning non-null introspector if one is null
* (and return just null if both are null)
*/
public static AnnotationIntrospector create(AnnotationIntrospector primary,
AnnotationIntrospector secondary)
{
if (primary == null) {
return secondary;
}
if (secondary == null) {
return primary;
}
return new AnnotationIntrospectorPair(primary, secondary);
}
@Override
public Collection allIntrospectors() {
return allIntrospectors(new ArrayList());
}
@Override
public Collection allIntrospectors(Collection result)
{
_primary.allIntrospectors(result);
_secondary.allIntrospectors(result);
return result;
}
// // // Generic annotation properties, lookup
@Override
public boolean isAnnotationBundle(Annotation ann) {
return _primary.isAnnotationBundle(ann) || _secondary.isAnnotationBundle(ann);
}
/*
/******************************************************
/* General class annotations
/******************************************************
*/
@Override
public PropertyName findRootName(AnnotatedClass ac)
{
PropertyName name1 = _primary.findRootName(ac);
if (name1 == null) {
return _secondary.findRootName(ac);
}
if (name1.hasSimpleName()) {
return name1;
}
// name1 is empty; how about secondary?
PropertyName name2 = _secondary.findRootName(ac);
return (name2 == null) ? name1 : name2;
}
@Override
public String[] findPropertiesToIgnore(Annotated ac)
{
String[] result = _primary.findPropertiesToIgnore(ac);
if (result == null) {
result = _secondary.findPropertiesToIgnore(ac);
}
return result;
}
@Override
public Boolean findIgnoreUnknownProperties(AnnotatedClass ac)
{
Boolean result = _primary.findIgnoreUnknownProperties(ac);
if (result == null) {
result = _secondary.findIgnoreUnknownProperties(ac);
}
return result;
}
@Override
public Boolean isIgnorableType(AnnotatedClass ac)
{
Boolean result = _primary.isIgnorableType(ac);
if (result == null) {
result = _secondary.isIgnorableType(ac);
}
return result;
}
@Deprecated
@Override
public Object findFilterId(AnnotatedClass ac)
{
Object id = _primary.findFilterId(ac);
if (id == null) {
id = _secondary.findFilterId(ac);
}
return id;
}
@Override
public Object findFilterId(Annotated ann)
{
Object id = _primary.findFilterId(ann);
if (id == null) {
id = _secondary.findFilterId(ann);
}
return id;
}
@Override
public Object findNamingStrategy(AnnotatedClass ac)
{
Object str = _primary.findNamingStrategy(ac);
if (str == null) {
str = _secondary.findNamingStrategy(ac);
}
return str;
}
/*
/******************************************************
/* Property auto-detection
/******************************************************
*/
@Override
public VisibilityChecker findAutoDetectVisibility(AnnotatedClass ac,
VisibilityChecker checker)
{
/* Note: to have proper priorities, we must actually call delegatees
* in reverse order:
*/
checker = _secondary.findAutoDetectVisibility(ac, checker);
return _primary.findAutoDetectVisibility(ac, checker);
}
/*
/******************************************************
/* Type handling
/******************************************************
*/
@Override
public TypeResolverBuilder findTypeResolver(MapperConfig config,
AnnotatedClass ac, JavaType baseType)
{
TypeResolverBuilder b = _primary.findTypeResolver(config, ac, baseType);
if (b == null) {
b = _secondary.findTypeResolver(config, ac, baseType);
}
return b;
}
@Override
public TypeResolverBuilder findPropertyTypeResolver(MapperConfig config,
AnnotatedMember am, JavaType baseType)
{
TypeResolverBuilder b = _primary.findPropertyTypeResolver(config, am, baseType);
if (b == null) {
b = _secondary.findPropertyTypeResolver(config, am, baseType);
}
return b;
}
@Override
public TypeResolverBuilder findPropertyContentTypeResolver(MapperConfig config,
AnnotatedMember am, JavaType baseType)
{
TypeResolverBuilder b = _primary.findPropertyContentTypeResolver(config, am, baseType);
if (b == null) {
b = _secondary.findPropertyContentTypeResolver(config, am, baseType);
}
return b;
}
@Override
public List findSubtypes(Annotated a)
{
List types1 = _primary.findSubtypes(a);
List types2 = _secondary.findSubtypes(a);
if (types1 == null || types1.isEmpty()) return types2;
if (types2 == null || types2.isEmpty()) return types1;
ArrayList result = new ArrayList(types1.size() + types2.size());
result.addAll(types1);
result.addAll(types2);
return result;
}
@Override
public String findTypeName(AnnotatedClass ac)
{
String name = _primary.findTypeName(ac);
if (name == null || name.length() == 0) {
name = _secondary.findTypeName(ac);
}
return name;
}
// // // General member (field, method/constructor) annotations
@Override
public ReferenceProperty findReferenceType(AnnotatedMember member) {
ReferenceProperty r = _primary.findReferenceType(member);
return (r == null) ? _secondary.findReferenceType(member) : r;
}
@Override
public NameTransformer findUnwrappingNameTransformer(AnnotatedMember member) {
NameTransformer r = _primary.findUnwrappingNameTransformer(member);
return (r == null) ? _secondary.findUnwrappingNameTransformer(member) : r;
}
@Override
public Object findInjectableValueId(AnnotatedMember m) {
Object r = _primary.findInjectableValueId(m);
return (r == null) ? _secondary.findInjectableValueId(m) : r;
}
@Override
public boolean hasIgnoreMarker(AnnotatedMember m) {
return _primary.hasIgnoreMarker(m) || _secondary.hasIgnoreMarker(m);
}
@Override
public Boolean hasRequiredMarker(AnnotatedMember m) {
Boolean r = _primary.hasRequiredMarker(m);
return (r == null) ? _secondary.hasRequiredMarker(m) : r;
}
// // // Serialization: general annotations
@Override
public Object findSerializer(Annotated am) {
Object r = _primary.findSerializer(am);
return _isExplicitClassOrOb(r, JsonSerializer.None.class)
? r : _secondary.findSerializer(am);
}
@Override
public Object findKeySerializer(Annotated a) {
Object r = _primary.findKeySerializer(a);
return _isExplicitClassOrOb(r, JsonSerializer.None.class)
? r : _secondary.findKeySerializer(a);
}
@Override
public Object findContentSerializer(Annotated a) {
Object r = _primary.findContentSerializer(a);
return _isExplicitClassOrOb(r, JsonSerializer.None.class)
? r : _secondary.findContentSerializer(a);
}
@Override
public Object findNullSerializer(Annotated a) {
Object r = _primary.findNullSerializer(a);
return _isExplicitClassOrOb(r, JsonSerializer.None.class)
? r : _secondary.findNullSerializer(a);
}
@Override
public JsonInclude.Include findSerializationInclusion(Annotated a,
JsonInclude.Include defValue)
{
/* This is bit trickier: need to combine results in a meaningful
* way. Seems like it should be a disjoint; that is, most
* restrictive value should be returned.
* For enumerations, comparison is done by indexes, which
* works: largest value is the last one, which is the most
* restrictive value as well.
*/
/* 09-Mar-2010, tatu: Actually, as per [JACKSON-256], it is probably better to just
* use strict overriding. Simpler, easier to understand.
*/
// note: call secondary first, to give lower priority
defValue = _secondary.findSerializationInclusion(a, defValue);
defValue = _primary.findSerializationInclusion(a, defValue);
return defValue;
}
@Override
public Class findSerializationType(Annotated a) {
Class r = _primary.findSerializationType(a);
return (r == null) ? _secondary.findSerializationType(a) : r;
}
@Override
public Class findSerializationKeyType(Annotated am, JavaType baseType) {
Class r = _primary.findSerializationKeyType(am, baseType);
return (r == null) ? _secondary.findSerializationKeyType(am, baseType) : r;
}
@Override
public Class findSerializationContentType(Annotated am, JavaType baseType) {
Class r = _primary.findSerializationContentType(am, baseType);
return (r == null) ? _secondary.findSerializationContentType(am, baseType) : r;
}
@Override
public JsonSerialize.Typing findSerializationTyping(Annotated a) {
JsonSerialize.Typing r = _primary.findSerializationTyping(a);
return (r == null) ? _secondary.findSerializationTyping(a) : r;
}
@Override
public Object findSerializationConverter(Annotated a) {
Object r = _primary.findSerializationConverter(a);
return (r == null) ? _secondary.findSerializationConverter(a) : r;
}
@Override
public Object findSerializationContentConverter(AnnotatedMember a) {
Object r = _primary.findSerializationContentConverter(a);
return (r == null) ? _secondary.findSerializationContentConverter(a) : r;
}
@Override
public Class[] findViews(Annotated a) {
/* Theoretically this could be trickier, if multiple introspectors
* return non-null entries. For now, though, we'll just consider
* first one to return non-null to win.
*/
Class[] result = _primary.findViews(a);
if (result == null) {
result = _secondary.findViews(a);
}
return result;
}
@Override
public Boolean isTypeId(AnnotatedMember member) {
Boolean b = _primary.isTypeId(member);
return (b == null) ? _secondary.isTypeId(member) : b;
}
@Override
public ObjectIdInfo findObjectIdInfo(Annotated ann) {
ObjectIdInfo r = _primary.findObjectIdInfo(ann);
return (r == null) ? _secondary.findObjectIdInfo(ann) : r;
}
@Override
public ObjectIdInfo findObjectReferenceInfo(Annotated ann, ObjectIdInfo objectIdInfo) {
// to give precedence for primary, must start with secondary:
objectIdInfo = _secondary.findObjectReferenceInfo(ann, objectIdInfo);
objectIdInfo = _primary.findObjectReferenceInfo(ann, objectIdInfo);
return objectIdInfo;
}
@Override
public JsonFormat.Value findFormat(Annotated ann) {
JsonFormat.Value r = _primary.findFormat(ann);
return (r == null) ? _secondary.findFormat(ann) : r;
}
@Override
public PropertyName findWrapperName(Annotated ann) {
PropertyName name = _primary.findWrapperName(ann);
if (name == null) {
name = _secondary.findWrapperName(ann);
} else if (name == PropertyName.USE_DEFAULT) {
// does the other introspector have a better idea?
PropertyName name2 = _secondary.findWrapperName(ann);
if (name2 != null) {
name = name2;
}
}
return name;
}
@Override
public String findPropertyDescription(Annotated ann) {
String r = _primary.findPropertyDescription(ann);
return (r == null) ? _secondary.findPropertyDescription(ann) : r;
}
@Override
public Integer findPropertyIndex(Annotated ann) {
Integer r = _primary.findPropertyIndex(ann);
return (r == null) ? _secondary.findPropertyIndex(ann) : r;
}
@Override
public String findImplicitPropertyName(AnnotatedMember param) {
String r = _primary.findImplicitPropertyName(param);
return (r == null) ? _secondary.findImplicitPropertyName(param) : r;
}
// // // Serialization: class annotations
@Override
public String[] findSerializationPropertyOrder(AnnotatedClass ac) {
String[] r = _primary.findSerializationPropertyOrder(ac);
return (r == null) ? _secondary.findSerializationPropertyOrder(ac) : r;
}
/**
* Method for checking whether an annotation indicates that serialized properties
* for which no explicit is defined should be alphabetically (lexicograpically)
* ordered
*/
@Override
@Deprecated
public Boolean findSerializationSortAlphabetically(AnnotatedClass ac) {
Boolean r = _primary.findSerializationSortAlphabetically(ac);
return (r == null) ? _secondary.findSerializationSortAlphabetically(ac) : r;
}
@Override
public Boolean findSerializationSortAlphabetically(Annotated ann) {
Boolean r = _primary.findSerializationSortAlphabetically(ann);
return (r == null) ? _secondary.findSerializationSortAlphabetically(ann) : r;
}
// // // Serialization: property annotations
@Override
public PropertyName findNameForSerialization(Annotated a) {
PropertyName n = _primary.findNameForSerialization(a);
// note: "use default" should not block explicit answer, so:
if (n == null) {
n = _secondary.findNameForSerialization(a);
} else if (n == PropertyName.USE_DEFAULT) {
PropertyName n2 = _secondary.findNameForSerialization(a);
if (n2 != null) {
n = n2;
}
}
return n;
}
@Override
public boolean hasAsValueAnnotation(AnnotatedMethod am) {
return _primary.hasAsValueAnnotation(am) || _secondary.hasAsValueAnnotation(am);
}
@Override
public String findEnumValue(Enum value) {
String r = _primary.findEnumValue(value);
return (r == null) ? _secondary.findEnumValue(value) : r;
}
// // // Deserialization: general annotations
@Override
public Object findDeserializer(Annotated am) {
Object r = _primary.findDeserializer(am);
return _isExplicitClassOrOb(r, JsonDeserializer.None.class)
? r : _secondary.findDeserializer(am);
}
@Override
public Object findKeyDeserializer(Annotated am) {
Object r = _primary.findKeyDeserializer(am);
return _isExplicitClassOrOb(r, KeyDeserializer.None.class)
? r : _secondary.findKeyDeserializer(am);
}
@Override
public Object findContentDeserializer(Annotated am) {
Object r = _primary.findContentDeserializer(am);
return _isExplicitClassOrOb(r, JsonDeserializer.None.class)
? r : _secondary.findContentDeserializer(am);
}
@Override
public Class findDeserializationType(Annotated am, JavaType baseType) {
Class r = _primary.findDeserializationType(am, baseType);
return (r != null) ? r : _secondary.findDeserializationType(am, baseType);
}
@Override
public Class findDeserializationKeyType(Annotated am, JavaType baseKeyType) {
Class result = _primary.findDeserializationKeyType(am, baseKeyType);
return (result == null) ? _secondary.findDeserializationKeyType(am, baseKeyType) : result;
}
@Override
public Class findDeserializationContentType(Annotated am, JavaType baseContentType) {
Class result = _primary.findDeserializationContentType(am, baseContentType);
return (result == null) ? _secondary.findDeserializationContentType(am, baseContentType) : result;
}
@Override
public Object findDeserializationConverter(Annotated a) {
Object ob = _primary.findDeserializationConverter(a);
return (ob == null) ? _secondary.findDeserializationConverter(a) : ob;
}
@Override
public Object findDeserializationContentConverter(AnnotatedMember a) {
Object ob = _primary.findDeserializationContentConverter(a);
return (ob == null) ? _secondary.findDeserializationContentConverter(a) : ob;
}
// // // Deserialization: class annotations
@Override
public Object findValueInstantiator(AnnotatedClass ac) {
Object result = _primary.findValueInstantiator(ac);
return (result == null) ? _secondary.findValueInstantiator(ac) : result;
}
@Override
public Class findPOJOBuilder(AnnotatedClass ac) {
Class result = _primary.findPOJOBuilder(ac);
return (result == null) ? _secondary.findPOJOBuilder(ac) : result;
}
@Override
public JsonPOJOBuilder.Value findPOJOBuilderConfig(AnnotatedClass ac) {
JsonPOJOBuilder.Value result = _primary.findPOJOBuilderConfig(ac);
return (result == null) ? _secondary.findPOJOBuilderConfig(ac) : result;
}
// // // Deserialization: method annotations
@Override
public PropertyName findNameForDeserialization(Annotated a)
{
// note: "use default" should not block explicit answer, so:
PropertyName n = _primary.findNameForDeserialization(a);
if (n == null) {
n = _secondary.findNameForDeserialization(a);
} else if (n == PropertyName.USE_DEFAULT) {
PropertyName n2 = _secondary.findNameForDeserialization(a);
if (n2 != null) {
n = n2;
}
}
return n;
}
@Override
public boolean hasAnySetterAnnotation(AnnotatedMethod am) {
return _primary.hasAnySetterAnnotation(am) || _secondary.hasAnySetterAnnotation(am);
}
@Override
public boolean hasAnyGetterAnnotation(AnnotatedMethod am) {
return _primary.hasAnyGetterAnnotation(am) || _secondary.hasAnyGetterAnnotation(am);
}
@Override
public boolean hasCreatorAnnotation(Annotated a) {
return _primary.hasCreatorAnnotation(a) || _secondary.hasCreatorAnnotation(a);
}
protected boolean _isExplicitClassOrOb(Object maybeCls, Class implicit) {
if (maybeCls == null) {
return false;
}
if (!(maybeCls instanceof Class)) {
return true;
}
Class cls = (Class) maybeCls;
return (cls != implicit && !ClassUtil.isBogusClass(cls));
}
}