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package com.fasterxml.jackson.databind;
import java.lang.annotation.Annotation;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.cfg.MapperConfig;
import com.fasterxml.jackson.databind.introspect.AnnotatedMember;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonObjectFormatVisitor;
import com.fasterxml.jackson.databind.util.Annotations;
import com.fasterxml.jackson.databind.util.Named;
/**
* Bean properties are logical entities that represent data
* that Java objects (POJOs (Plain Old Java Objects), sometimes also called "beans")
* contain; and that are accessed using accessors (methods like getters
* and setters, fields, constructor parametrers).
* Instances allow access to annotations directly associated
* to property (via field or method), as well as contextual
* annotations (annotations for class that contains properties).
*
* Instances are not typically passed when constructing serializers
* and deserializers, but rather only passed when context
* is known when
* {@link com.fasterxml.jackson.databind.ser.ContextualSerializer} and
* {@link com.fasterxml.jackson.databind.deser.ContextualDeserializer}
* resolution occurs (createContextual(...) method is called).
* References may (need to) be retained by serializers and deserializers,
* especially when further resolving dependant handlers like value
* serializers/deserializers or structured types.
*/
public interface BeanProperty extends Named
{
public final static JsonFormat.Value EMPTY_FORMAT = new JsonFormat.Value();
public final static JsonInclude.Value EMPTY_INCLUDE = JsonInclude.Value.empty();
/**
* Method to get logical name of the property
*/
@Override
public String getName();
/**
* Method for getting full name definition, including possible
* format-specific additional properties (such as namespace when
* using XML backend).
*
* @since 2.3
*/
public PropertyName getFullName();
/**
* Method to get declared type of the property.
*/
public JavaType getType();
/**
* If property is indicated to be wrapped, name of
* wrapper element to use.
*
* @since 2.2
*/
public PropertyName getWrapperName();
/**
* Accessor for additional optional information about property.
*
* @since 2.3
*
* @return Metadata about property; never null.
*/
public PropertyMetadata getMetadata();
/**
* Whether value for property is marked as required using
* annotations or associated schema.
* Equivalent to:
*
* getMetadata().isRequired()
*
*
* @since 2.2
*/
public boolean isRequired();
/**
* Accessor for checking whether there is an actual physical property
* behind this property abstraction or not.
*
* @since 2.7
*/
public boolean isVirtual();
/*
/**********************************************************
/* Access to annotation information
/**********************************************************
*/
/**
* Method for finding annotation associated with this property;
* meaning annotation associated with one of entities used to
* access property.
*
* Note that this method should only be called for custom annotations;
* access to standard Jackson annotations (or ones supported by
* alternate {@link AnnotationIntrospector}s) should be accessed
* through {@link AnnotationIntrospector}.
*/
public A getAnnotation(Class acls);
/**
* Method for finding annotation associated with context of
* this property; usually class in which member is declared
* (or its subtype if processing subtype).
*
* Note that this method should only be called for custom annotations;
* access to standard Jackson annotations (or ones supported by
* alternate {@link AnnotationIntrospector}s) should be accessed
* through {@link AnnotationIntrospector}.
*/
public A getContextAnnotation(Class acls);
/**
* Method for accessing primary physical entity that represents the property;
* annotated field, method or constructor property.
*/
public AnnotatedMember getMember();
/**
* Convenience method that is roughly equivalent to
*
* return intr.findFormat(getMember());
*
* and specifically does NOT try to find per-type format defaults to merge;
* use {@link #findPropertyFormat} if such defaults would be useful.
*
* @since 2.6
*
* @deprecated since 2.8 use {@link #findPropertyFormat} instead.
*/
@Deprecated
public JsonFormat.Value findFormatOverrides(AnnotationIntrospector intr);
/**
* Helper method used to look up format settings applicable to this property,
* considering both possible per-type configuration settings
*
* @since 2.7
*/
public JsonFormat.Value findPropertyFormat(MapperConfig config, Class baseType);
/**
* Convenience method that is roughly equivalent to
*
* return config.getAnnotationIntrospector().findPropertyInclusion(getMember());
*
* but also considers global default settings for inclusion
*
* @since 2.7
*/
public JsonInclude.Value findPropertyInclusion(MapperConfig config, Class baseType);
/*
/**********************************************************
/* Schema/introspection support
/**********************************************************
*/
/**
* Method that can be called to visit the type structure that this
* property is part of.
* Note that not all implementations support traversal with this
* method; those that do not should throw
* {@link UnsupportedOperationException}.
*
* NOTE: Starting with 2.7, takes explicit {@link SerializerProvider}
* argument to reduce the need to rely on provider visitor may or may not
* have assigned.
*
* @param objectVisitor Visitor to used as the callback handler
*
* @since 2.2 (although signature did change in 2.7)
*/
public void depositSchemaProperty(JsonObjectFormatVisitor objectVisitor,
SerializerProvider provider)
throws JsonMappingException;
/*
/**********************************************************
/* Helper classes
/**********************************************************
*/
/**
* Simple stand-alone implementation, useful as a placeholder
* or base class for more complex implementations.
*/
public static class Std implements BeanProperty
{
protected final PropertyName _name;
protected final JavaType _type;
protected final PropertyName _wrapperName;
protected final PropertyMetadata _metadata;
/**
* Physical entity (field, method or constructor argument) that
* is used to access value of property (or in case of constructor
* property, just placeholder)
*/
protected final AnnotatedMember _member;
/**
* Annotations defined in the context class (if any); may be null
* if no annotations were found
*/
protected final Annotations _contextAnnotations;
public Std(PropertyName name, JavaType type, PropertyName wrapperName,
Annotations contextAnnotations, AnnotatedMember member,
PropertyMetadata metadata)
{
_name = name;
_type = type;
_wrapperName = wrapperName;
_metadata = metadata;
_member = member;
_contextAnnotations = contextAnnotations;
}
/**
* @since 2.6
*/
public Std(Std base, JavaType newType) {
this(base._name, newType, base._wrapperName, base._contextAnnotations, base._member, base._metadata);
}
public Std withType(JavaType type) {
return new Std(this, type);
}
@Override
public A getAnnotation(Class acls) {
return (_member == null) ? null : _member.getAnnotation(acls);
}
@Override
public A getContextAnnotation(Class acls) {
return (_contextAnnotations == null) ? null : _contextAnnotations.get(acls);
}
@Override
@Deprecated
public JsonFormat.Value findFormatOverrides(AnnotationIntrospector intr) {
if ((_member != null) && (intr != null)) {
JsonFormat.Value v = intr.findFormat(_member);
if (v != null) {
return v;
}
}
return EMPTY_FORMAT;
}
@Override
public JsonFormat.Value findPropertyFormat(MapperConfig config, Class baseType) {
JsonFormat.Value v0 = config.getDefaultPropertyFormat(baseType);
AnnotationIntrospector intr = config.getAnnotationIntrospector();
if ((intr == null) || (_member == null)) {
return v0;
}
JsonFormat.Value v = intr.findFormat(_member);
if (v == null) {
return v0;
}
return v0.withOverrides(v);
}
@Override
public JsonInclude.Value findPropertyInclusion(MapperConfig config, Class baseType)
{
JsonInclude.Value v0 = config.getDefaultPropertyInclusion(baseType);
AnnotationIntrospector intr = config.getAnnotationIntrospector();
if ((intr == null) || (_member == null)) {
return v0;
}
JsonInclude.Value v = intr.findPropertyInclusion(_member);
if (v == null) {
return v0;
}
return v0.withOverrides(v);
}
@Override public String getName() { return _name.getSimpleName(); }
@Override public PropertyName getFullName() { return _name; }
@Override public JavaType getType() { return _type; }
@Override public PropertyName getWrapperName() { return _wrapperName; }
@Override public boolean isRequired() { return _metadata.isRequired(); }
@Override public PropertyMetadata getMetadata() { return _metadata; }
@Override public AnnotatedMember getMember() { return _member; }
@Override
public boolean isVirtual() { return false; }
/**
* Implementation of this method throws
* {@link UnsupportedOperationException}, since instances of this
* implementation should not be used as part of actual structure
* visited. Rather, other implementations should handle it.
*/
@Override
public void depositSchemaProperty(JsonObjectFormatVisitor objectVisitor,
SerializerProvider provider) {
throw new UnsupportedOperationException("Instances of "+getClass().getName()+" should not get visited");
}
}
}