Package com.fasterxml.jackson.databind.deser.std

Class StdScalarDeserializer<T>

java.lang.Object

com.fasterxml.jackson.databind.JsonDeserializer<T>

com.fasterxml.jackson.databind.deser.std.StdDeserializer<T>

com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer<T>

All Implemented Interfaces:

NullValueProvider, ValueInstantiator.Gettable, Serializable

Direct Known Subclasses:

AtomicBooleanDeserializer, AtomicIntegerDeserializer, AtomicLongDeserializer, ByteBufferDeserializer, DateDeserializers.CalendarDeserializer, DateDeserializers.DateDeserializer, DateDeserializers.SqlDateDeserializer, DateDeserializers.TimestampDeserializer, DurationDeserializer, EnumDeserializer, FromStringDeserializer, JSR310DateTimeDeserializerBase, JSR310StringParsableDeserializer, NioPathDeserializer, NumberDeserializers.BigDecimalDeserializer, NumberDeserializers.BigIntegerDeserializer, NumberDeserializers.BooleanDeserializer, NumberDeserializers.ByteDeserializer, NumberDeserializers.CharacterDeserializer, NumberDeserializers.DoubleDeserializer, NumberDeserializers.FloatDeserializer, NumberDeserializers.IntegerDeserializer, NumberDeserializers.LongDeserializer, NumberDeserializers.NumberDeserializer, NumberDeserializers.ShortDeserializer, StackTraceElementDeserializer, StringDeserializer, TokenBufferDeserializer

public abstract class StdScalarDeserializer<T>
extends StdDeserializer<T>

Base class for deserializers that handle types that are serialized as JSON scalars (non-structured, i.e. non-Object, non-Array, values).

See Also:

• Serialized Form

Nested Class Summary

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

JsonDeserializer.None

Method Summary

Modifier and Type	Method	Description
T	deserialize(JsonParser p, DeserializationContext ctxt, T intoValue)	Overridden to simply call deserialize() method that does not take value to update, since scalar values are usually non-mergeable.
Object	deserializeWithType(JsonParser p, DeserializationContext ctxt, TypeDeserializer typeDeserializer)	Base implementation that does not assume specific type inclusion mechanism.
AccessPattern	getEmptyAccessPattern()	This method may be called in conjunction with calls to JsonDeserializer.getEmptyValue(DeserializationContext), to check whether it needs to be called just once (static values), or each time empty value is needed.
AccessPattern	getNullAccessPattern()	This method may be called in conjunction with calls to JsonDeserializer.getNullValue(DeserializationContext), to check whether it needs to be called just once (static values), or each time empty value is needed.
LogicalType	logicalType()	Method for accessing logical type of values this deserializer produces.
Boolean	supportsUpdate(DeserializationConfig config)	By default assumption is that scalar types cannot be updated: many are immutable values (such as primitives and wrappers)

Methods inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer

getValueClass, getValueInstantiator, getValueType, getValueType, handledType

Methods inherited from class com.fasterxml.jackson.databind.JsonDeserializer

deserialize, deserializeWithType, findBackReference, getAbsentValue, getDelegatee, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullValue, getNullValue, getObjectIdReader, isCachable, replaceDelegatee, unwrappingDeserializer

Methods inherited from class java.lang.Object

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

Method Details

logicalType

public LogicalType logicalType()

Description copied from class: JsonDeserializer

Method for accessing logical type of values this deserializer produces. Typically used for further configuring handling of values, for example, to find which coercions are legal.

Overrides:

logicalType in class JsonDeserializer<T>

Returns:

Logical type of values this deserializer produces, if known; null if not

supportsUpdate

public Boolean supportsUpdate(DeserializationConfig config)

By default assumption is that scalar types cannot be updated: many are immutable values (such as primitives and wrappers)

Overrides:

supportsUpdate in class JsonDeserializer<T>

getNullAccessPattern

public AccessPattern getNullAccessPattern()

Description copied from class: JsonDeserializer

This method may be called in conjunction with calls to JsonDeserializer.getNullValue(DeserializationContext), to check whether it needs to be called just once (static values), or each time empty value is needed.

Default implementation indicates that the "null value" to use for input null does not vary across uses so that JsonDeserializer.getNullValue(DeserializationContext) need not be called more than once per deserializer instance. This information may be used as optimization.

Specified by:

getNullAccessPattern in interface NullValueProvider

Overrides:

getNullAccessPattern in class JsonDeserializer<T>

getEmptyAccessPattern

public AccessPattern getEmptyAccessPattern()

Description copied from class: JsonDeserializer

This method may be called in conjunction with calls to JsonDeserializer.getEmptyValue(DeserializationContext), to check whether it needs to be called just once (static values), or each time empty value is needed.

Overrides:

getEmptyAccessPattern in class JsonDeserializer<T>

deserializeWithType

public Object deserializeWithType(JsonParser p,
 DeserializationContext ctxt,
 TypeDeserializer typeDeserializer)
                           throws IOException

Description copied from class: StdDeserializer

Base implementation that does not assume specific type inclusion mechanism. Sub-classes are expected to override this method if they are to handle type information.

Overrides:

deserializeWithType in class StdDeserializer<T>

Parameters:

typeDeserializer - Deserializer to use for handling type information

Throws:

IOException

deserialize

public T deserialize(JsonParser p,
 DeserializationContext ctxt,
 T intoValue)
              throws IOException

Overridden to simply call deserialize() method that does not take value to update, since scalar values are usually non-mergeable.

Overrides:

deserialize in class JsonDeserializer<T>

Throws:

IOException