com.fasterxml.jackson.databind.introspect.BeanPropertyDefinition Maven / Gradle / Ivy
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package com.fasterxml.jackson.databind.introspect;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.util.ClassUtil;
import com.fasterxml.jackson.databind.util.Named;
/**
* Simple value classes that contain definitions of properties,
* used during introspection of properties to use for
* serialization and deserialization purposes.
* These instances are created before actual {@link BeanProperty}
* instances are created, i.e. they are used earlier in the process
* flow, and are typically used to construct actual
* {@link BeanProperty} instances.
*/
public abstract class BeanPropertyDefinition
implements Named
{
protected final static JsonInclude.Value EMPTY_INCLUDE = JsonInclude.Value.empty();
/*
/**********************************************************
/* Fluent factory methods for creating modified copies
/**********************************************************
*/
/**
* Method that can be used to create a definition with
* same settings as this one, but with different
* (external) name; that is, one for which
* {@link #getName()} would return newName.
*
* @since 2.3
*/
public abstract BeanPropertyDefinition withName(PropertyName newName);
/**
* Alternate "mutant factory" that will only change simple name, but
* leave other optional parts (like namespace) as is.
*
* @since 2.3
*/
public abstract BeanPropertyDefinition withSimpleName(String newSimpleName);
/*
/**********************************************************
/* Property name information
/**********************************************************
*/
/**
* Accessor for name used for external representation (in JSON).
*/
@Override // from Named
public abstract String getName();
public abstract PropertyName getFullName();
/**
* @since 2.6
*/
public boolean hasName(PropertyName name) {
return getFullName().equals(name);
}
/**
* Accessor that can be used to determine implicit name from underlying
* element(s) before possible renaming. This is the "internal"
* name derived from accessor ("x" from "getX"), and is not based on
* annotations or naming strategy.
*/
public abstract String getInternalName();
/**
* Accessor for finding wrapper name to use for property (if any).
*
* @since 2.2
*/
public abstract PropertyName getWrapperName();
/**
* Accessor that can be called to check whether property was included
* due to an explicit marker (usually annotation), or just by naming
* convention.
*
* @return True if property was explicitly included (usually by having
* one of components being annotated); false if inclusion was purely
* due to naming or visibility definitions (that is, implicit)
*/
public abstract boolean isExplicitlyIncluded();
/**
* Accessor that can be called to check whether property name was
* due to an explicit marker (usually annotation), or just by naming
* convention or use of "use-default-name" marker (annotation).
*
* Note that entries that return true from this method will always
* return true for {@link #isExplicitlyIncluded()}, but not necessarily
* vice versa.
*
* @since 2.4
*/
public boolean isExplicitlyNamed() {
return isExplicitlyIncluded();
}
/*
/**********************************************************
/* Basic property metadata
/**********************************************************
*/
/**
* @since 2.9
*/
public abstract JavaType getPrimaryType();
/**
* @since 2.9
*/
public abstract Class getRawPrimaryType();
/**
* Method for accessing additional metadata.
* NOTE: will never return null, so de-referencing return value
* is safe.
*
* @since 2.3
*/
public abstract PropertyMetadata getMetadata();
/**
* Method used to check if this property is expected to have a value;
* and if none found, should either be considered invalid (and most likely
* fail deserialization), or handled by other means (by providing default
* value)
*/
public boolean isRequired() {
return getMetadata().isRequired();
}
/*
/**********************************************************
/* Capabilities
/**********************************************************
*/
public boolean couldDeserialize() { return getMutator() != null; }
public boolean couldSerialize() { return getAccessor() != null; }
/*
/**********************************************************
/* Access to accessors (fields, methods etc)
/**********************************************************
*/
public abstract boolean hasGetter();
public abstract boolean hasSetter();
public abstract boolean hasField();
public abstract boolean hasConstructorParameter();
public abstract AnnotatedMethod getGetter();
public abstract AnnotatedMethod getSetter();
public abstract AnnotatedField getField();
public abstract AnnotatedParameter getConstructorParameter();
/**
* Additional method that may be called instead of {@link #getConstructorParameter()}
* to get access to all constructor parameters, not just the highest priority one.
*
* @since 2.5
*/
public Iterator getConstructorParameters() {
return ClassUtil.emptyIterator();
}
/**
* Method used to find accessor (getter, field to access) to use for accessing
* value of the property.
* Null if no such member exists.
*/
public AnnotatedMember getAccessor()
{
AnnotatedMember m = getGetter();
if (m == null) {
m = getField();
}
return m;
}
/**
* Method used to find mutator (constructor parameter, setter, field) to use for
* changing value of the property.
* Null if no such member exists.
*/
public AnnotatedMember getMutator() {
AnnotatedMember acc = getConstructorParameter();
if (acc == null) {
acc = getSetter();
if (acc == null) {
acc = getField();
}
}
return acc;
}
/**
* @since 2.3
*/
public AnnotatedMember getNonConstructorMutator() {
AnnotatedMember m = getSetter();
if (m == null) {
m = getField();
}
return m;
}
/**
* Method used to find the property member (getter, setter, field) that has
* the highest precedence in current context (getter method when serializing,
* if available, and so forth), if any.
*
* Note: may throw {@link IllegalArgumentException} in case problems are found
* trying to getter or setter info.
*
* Note: abstract since 2.5
*
* @since 2.1
*/
public abstract AnnotatedMember getPrimaryMember();
/*
/**********************************************************
/* More refined access to configuration features
/* (usually based on annotations and/or config overrides)
/* Since most trivial implementations do not support
/* these methods, they are implemented as no-ops.
/**********************************************************
*/
/**
* Method used to find View-inclusion definitions for the property.
*/
public Class[] findViews() { return null; }
/**
* Method used to find whether property is part of a bi-directional
* reference.
*/
public AnnotationIntrospector.ReferenceProperty findReferenceType() { return null; }
/**
* @since 2.9
*/
public String findReferenceName() {
AnnotationIntrospector.ReferenceProperty ref = findReferenceType();
return (ref == null) ? null : ref.getName();
}
/**
* Method used to check whether this logical property has a marker
* to indicate it should be used as the type id for polymorphic type
* handling.
*/
public boolean isTypeId() { return false; }
/**
* Method used to check whether this logical property indicates that
* value POJOs should be written using additional Object Identifier
* (or, when multiple references exist, all but first AS Object Identifier).
*/
public ObjectIdInfo findObjectIdInfo() { return null; }
/**
* Method used to check if this property has specific inclusion override
* associated with it or not.
* It should NOT check for any default settings (global, per-type, or
* containing POJO settings)
*
* @since 2.5
*/
public abstract JsonInclude.Value findInclusion();
/**
* Method for finding all aliases of the property, if any.
*
* @return {@code List} of aliases, if any; never null (empty list if no aliases found)
*
* @since 2.17
*/
public List findAliases() {
return Collections.emptyList();
}
}