Package com.fasterxml.jackson.databind.deser.impl

Class MergingSettableBeanProperty

java.lang.Object

com.fasterxml.jackson.databind.introspect.ConcreteBeanPropertyBase

com.fasterxml.jackson.databind.deser.SettableBeanProperty

com.fasterxml.jackson.databind.deser.SettableBeanProperty.Delegating

com.fasterxml.jackson.databind.deser.impl.MergingSettableBeanProperty

All Implemented Interfaces:

BeanProperty, Named, Serializable

public class MergingSettableBeanProperty
extends SettableBeanProperty.Delegating

SettableBeanProperty implementation that will try to access value of the property first, and if non-null value found, pass that for update (using JsonDeserializer.deserialize(com.fasterxml.jackson.core.JsonParser, com.fasterxml.jackson.databind.DeserializationContext, Object)) instead of constructing a new value. This is necessary to support "merging" properties.

Note that there are many similarities to SetterlessProperty, which predates this variant; and that one is even used in cases where there is no mutator available.

Since:

2.9

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.deser.SettableBeanProperty

SettableBeanProperty.Delegating

Nested classes/interfaces inherited from interface com.fasterxml.jackson.databind.BeanProperty

BeanProperty.Bogus, BeanProperty.Std

Field Summary

Fields inherited from interface com.fasterxml.jackson.databind.BeanProperty

EMPTY_FORMAT, EMPTY_INCLUDE

Method Summary

Modifier and Type	Method	Description
static MergingSettableBeanProperty	construct(SettableBeanProperty delegate, AnnotatedMember accessor)
void	deserializeAndSet(JsonParser p, DeserializationContext ctxt, Object instance)	Method called to deserialize appropriate value, given parser (and context), and set it using appropriate mechanism.
Object	deserializeSetAndReturn(JsonParser p, DeserializationContext ctxt, Object instance)	Alternative to SettableBeanProperty.deserializeAndSet(com.fasterxml.jackson.core.JsonParser, com.fasterxml.jackson.databind.DeserializationContext, java.lang.Object) that returns either return value of setter method called (if one is), or null to indicate that no return value is available.
void	set(Object instance, Object value)	Method called to assign given value to this property, on specified Object.
Object	setAndReturn(Object instance, Object value)	Method called to assign given value to this property, on specified Object, and return whatever delegating accessor returned (if anything)

Methods inherited from class com.fasterxml.jackson.databind.deser.SettableBeanProperty.Delegating

assignIndex, fixAccess, getAnnotation, getCreatorIndex, getDelegate, getInjectableValueId, getManagedReferenceName, getMember, getObjectIdInfo, getPropertyIndex, getValueDeserializer, getValueTypeDeserializer, hasValueDeserializer, hasValueTypeDeserializer, hasViews, isInjectionOnly, visibleInView, withName, withNullProvider, withValueDeserializer

Methods inherited from class com.fasterxml.jackson.databind.deser.SettableBeanProperty

depositSchemaProperty, deserialize, deserializeWith, getContextAnnotation, getFullName, getName, getNullValueProvider, getType, getWrapperName, isIgnorable, markAsIgnorable, setManagedReferenceName, setObjectIdInfo, setViews, toString, withSimpleName

Methods inherited from class com.fasterxml.jackson.databind.introspect.ConcreteBeanPropertyBase

findAliases, findFormatOverrides, findPropertyFormat, findPropertyInclusion, getMetadata, isRequired, isVirtual

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Details

construct

public static MergingSettableBeanProperty construct(SettableBeanProperty delegate,
 AnnotatedMember accessor)

deserializeAndSet

public void deserializeAndSet(JsonParser p,
 DeserializationContext ctxt,
 Object instance)
                       throws IOException

Description copied from class: SettableBeanProperty

Method called to deserialize appropriate value, given parser (and context), and set it using appropriate mechanism. Pre-condition is that passed parser must point to the first token that should be consumed to produce the value (the only value for scalars, multiple for Objects and Arrays).

Overrides:

deserializeAndSet in class SettableBeanProperty.Delegating

Throws:

IOException

deserializeSetAndReturn

public Object deserializeSetAndReturn(JsonParser p,
 DeserializationContext ctxt,
 Object instance)
                               throws IOException

Description copied from class: SettableBeanProperty

Alternative to SettableBeanProperty.deserializeAndSet(com.fasterxml.jackson.core.JsonParser, com.fasterxml.jackson.databind.DeserializationContext, java.lang.Object) that returns either return value of setter method called (if one is), or null to indicate that no return value is available. Mostly used to support Builder style deserialization.

Overrides:

deserializeSetAndReturn in class SettableBeanProperty.Delegating

Throws:

IOException

set

public void set(Object instance,
 Object value)
         throws IOException

Description copied from class: SettableBeanProperty

Method called to assign given value to this property, on specified Object.

Note: this is an optional operation, not supported by all implementations, creator-backed properties for example do not support this method.

Overrides:

set in class SettableBeanProperty.Delegating

Throws:

IOException

setAndReturn

public Object setAndReturn(Object instance,
 Object value)
                    throws IOException

Description copied from class: SettableBeanProperty

Method called to assign given value to this property, on specified Object, and return whatever delegating accessor returned (if anything)

Note: this is an optional operation, not supported by all implementations, creator-backed properties for example do not support this method.

Overrides:

setAndReturn in class SettableBeanProperty.Delegating

Throws:

IOException