public final class StringCollectionDeserializer extends ContainerDeserializerBase<Collection<String>> implements ContextualDeserializer
Collections
that contain String values; reason is that this is a very common
type and we can make use of the fact that Strings are final.JsonDeserializer.None| Modifier and Type | Field and Description |
|---|---|
protected JavaType |
_collectionType |
protected JsonDeserializer<Object> |
_delegateDeserializer
Deserializer that is used iff delegate-based creator is
to be used for deserializing from JSON Object.
|
protected JsonDeserializer<String> |
_valueDeserializer
Value deserializer to use, if NOT the standard one
(if it is, will be null).
|
protected ValueInstantiator |
_valueInstantiator
Instantiator used in case custom handling is needed for creation.
|
_valueClass, F_MASK_INT_COERCIONS| Modifier | Constructor and Description |
|---|---|
|
StringCollectionDeserializer(JavaType collectionType,
JsonDeserializer<?> valueDeser,
ValueInstantiator valueInstantiator) |
protected |
StringCollectionDeserializer(JavaType collectionType,
ValueInstantiator valueInstantiator,
JsonDeserializer<?> delegateDeser,
JsonDeserializer<?> valueDeser) |
| Modifier and Type | Method and Description |
|---|---|
JsonDeserializer<?> |
createContextual(DeserializationContext ctxt,
BeanProperty property)
Method called to see if a different (or differently configured) deserializer
is needed to deserialize values of specified property.
|
Collection<String> |
deserialize(JsonParser jp,
DeserializationContext ctxt)
Method that can be called to ask implementation to deserialize
JSON content into the value type this serializer handles.
|
Collection<String> |
deserialize(JsonParser jp,
DeserializationContext ctxt,
Collection<String> result)
Alternate deserialization method (compared to the most commonly
used,
JsonDeserializer.deserialize(JsonParser, DeserializationContext)),
which takes in initialized value instance, to be
configured and/or populated by deserializer. |
Object |
deserializeWithType(JsonParser jp,
DeserializationContext ctxt,
TypeDeserializer typeDeserializer)
Base implementation that does not assume specific type
inclusion mechanism.
|
JsonDeserializer<Object> |
getContentDeserializer()
Accesor for deserializer use for deserializing content values.
|
JavaType |
getContentType()
Accessor for declared type of contained value elements; either exact
type, or one of its supertypes.
|
boolean |
isCachable()
Method called to see if deserializer instance is cachable and
usable for other properties of same type (type for which instance
was created).
|
protected StringCollectionDeserializer |
withResolved(JsonDeserializer<?> delegateDeser,
JsonDeserializer<?> valueDeser) |
findBackReference, wrapAndThrow_coerceIntegral, _deserializeFromEmpty, _failDoubleToIntCoercion, _hasTextualNull, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _parseBoolean, _parseBooleanFromNumber, _parseBooleanPrimitive, _parseByte, _parseDate, _parseDouble, _parseDoublePrimitive, _parseFloat, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseShort, _parseShortPrimitive, _parseString, findConvertingContentDeserializer, findDeserializer, getValueClass, getValueType, handledType, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDoublegetDelegatee, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullValue, getNullValue, getObjectIdReader, replaceDelegatee, unwrappingDeserializerprotected final JavaType _collectionType
protected final JsonDeserializer<String> _valueDeserializer
protected final ValueInstantiator _valueInstantiator
protected final JsonDeserializer<Object> _delegateDeserializer
public StringCollectionDeserializer(JavaType collectionType, JsonDeserializer<?> valueDeser, ValueInstantiator valueInstantiator)
protected StringCollectionDeserializer(JavaType collectionType, ValueInstantiator valueInstantiator, JsonDeserializer<?> delegateDeser, JsonDeserializer<?> valueDeser)
protected StringCollectionDeserializer withResolved(JsonDeserializer<?> delegateDeser, JsonDeserializer<?> valueDeser)
public boolean isCachable()
JsonDeserializer
Note that cached instances are still resolved on per-property basis,
if instance implements ResolvableDeserializer:
cached instance is just as the base. This means that in most cases it is safe to
cache instances; however, it only makes sense to cache instances
if instantiation is expensive, or if instances are heavy-weight.
Default implementation returns false, to indicate that no caching is done.
isCachable in class JsonDeserializer<Collection<String>>public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property) throws JsonMappingException
ContextualDeserializercreateContextual in interface ContextualDeserializerctxt - Deserialization context to access configuration, additional
deserializers that may be needed by this deserializerproperty - Method, field or constructor parameter that represents the property
(and is used to assign deserialized value).
Should be available; but there may be cases where caller can not provide it and
null is passed instead (in which case impls usually pass 'this' deserializer as is)JsonMappingExceptionpublic JavaType getContentType()
ContainerDeserializerBasegetContentType in class ContainerDeserializerBase<Collection<String>>public JsonDeserializer<Object> getContentDeserializer()
ContainerDeserializerBasegetContentDeserializer in class ContainerDeserializerBase<Collection<String>>public Collection<String> deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException
JsonDeserializerPre-condition for this method is that the parser points to the first event that is part of value to deserializer (and which is never JSON 'null' literal, more on this below): for simple types it may be the only value; and for structured types the Object start marker or a FIELD_NAME.
The two possible input conditions for structured types result from polymorphism via fields. In the ordinary case, Jackson calls this method when it has encountered an OBJECT_START, and the method implementation must advance to the next token to see the first field name. If the application configures polymorphism via a field, then the object looks like the following.
{
"@class": "class name",
...
}
Jackson consumes the two tokens (the @class field name
and its value) in order to learn the class and select the deserializer.
Thus, the stream is pointing to the FIELD_NAME for the first field
after the @class. Thus, if you want your method to work correctly
both with and without polymorphism, you must begin your method with:
if (jp.getCurrentToken() == JsonToken.START_OBJECT) {
jp.nextToken();
}
This results in the stream pointing to the field name, so that
the two conditions align.
Post-condition is that the parser will point to the last event that is part of deserialized value (or in case deserialization fails, event that was not recognized or usable, which may be the same event as the one it pointed to upon call).
Note that this method is never called for JSON null literal, and thus deserializers need (and should) not check for it.
deserialize in class JsonDeserializer<Collection<String>>jp - Parsed used for reading JSON contentctxt - Context that can be used to access information about
this deserialization activity.IOExceptionpublic Collection<String> deserialize(JsonParser jp, DeserializationContext ctxt, Collection<String> result) throws IOException
JsonDeserializerJsonDeserializer.deserialize(JsonParser, DeserializationContext)),
which takes in initialized value instance, to be
configured and/or populated by deserializer.
Method is not necessarily used (or supported) by all types
(it will not work for immutable types, for obvious reasons):
most commonly it is used for Collections and Maps.
It may be used both with "updating readers" (for POJOs) and
when Collections and Maps use "getter as setter".
Default implementation just throws
UnsupportedOperationException, to indicate that types
that do not explicitly add support do not necessarily support
update-existing-value operation (esp. immutable types)
deserialize in class JsonDeserializer<Collection<String>>IOExceptionpublic Object deserializeWithType(JsonParser jp, DeserializationContext ctxt, TypeDeserializer typeDeserializer) throws IOException
StdDeserializerdeserializeWithType in class StdDeserializer<Collection<String>>typeDeserializer - Deserializer to use for handling type informationIOExceptionCopyright © 2008–2016 FasterXML. All rights reserved.