Class FromStringDeserializer<T>
- All Implemented Interfaces:
NullValueProvider
,ValueInstantiator.Gettable
,Serializable
- Direct Known Subclasses:
CoreXMLDeserializers.Std
,DOMDeserializer
,FromStringDeserializer.Std
,UUIDDeserializer
String.trim()
.
Partial deserializer implementation will try to first access current token as
a String, calls _deserialize(String,DeserializationContext)
and
returns return value.
If this does not work (current token not a simple scalar type), attempts
are made so that:
- Embedded values (
JsonToken.VALUE_EMBEDDED_OBJECT
) are returned as-is if they are of compatible type - Arrays may be "unwrapped" if (and only if)
DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS
is enabled, and array contains just a single scalar value that can be deserialized (for example, JSON Array with single JSON String element).
Special handling includes:
- Null values (
JsonToken.VALUE_NULL
) are handled by returning value returned byJsonDeserializer.getNullValue(DeserializationContext)
: default implementation simply returns Java `null` but this may be overridden. - Empty String (after trimming) will result in
_deserializeFromEmptyString()
getting called, and return value being returned as deserialization: default implementation simply returns `null`.
- See Also:
-
Nested Class Summary
Modifier and TypeClassDescriptionstatic class
"Chameleon" deserializer that works on simple types that are deserialized from a simple String.Nested classes/interfaces inherited from class edu.internet2.middleware.grouperClientExt.com.fasterxml.jackson.databind.JsonDeserializer
JsonDeserializer.None
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Field Summary
Fields inherited from class edu.internet2.middleware.grouperClientExt.com.fasterxml.jackson.databind.deser.std.StdDeserializer
_valueClass, _valueType, F_MASK_ACCEPT_ARRAYS, F_MASK_INT_COERCIONS
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionprotected abstract T
_deserialize
(String value, DeserializationContext ctxt) Main method from trying to deserialize actual value from non-empty String.protected T
_deserializeEmbedded
(Object ob, DeserializationContext ctxt) Overridable method to allow coercion from embedded value that is neithernull
nor directly assignable to target type.protected final T
Deprecated.protected Object
protected Object
protected Object
protected boolean
deserialize
(JsonParser p, DeserializationContext ctxt) Method that can be called to ask implementation to deserialize JSON content into the value type this serializer handles.static FromStringDeserializer<?>
findDeserializer
(Class<?> rawType) Factory method for trying to find a deserializer for one of supported types that have simple from-String serialization.Method for accessing logical type of values this deserializer produces.static Class<?>[]
types()
Methods inherited from class edu.internet2.middleware.grouperClientExt.com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer
deserialize, deserializeWithType, getEmptyAccessPattern, getNullAccessPattern, supportsUpdate
Methods inherited from class edu.internet2.middleware.grouperClientExt.com.fasterxml.jackson.databind.deser.std.StdDeserializer
_byteOverflow, _checkBooleanToStringCoercion, _checkCoercionFail, _checkDoubleSpecialValue, _checkFloatSpecialValue, _checkFloatToIntCoercion, _checkFloatToStringCoercion, _checkFromStringCoercion, _checkFromStringCoercion, _checkIntToFloatCoercion, _checkIntToStringCoercion, _checkTextualNull, _checkToStringCoercion, _coerceBooleanFromInt, _coercedTypeDesc, _coerceEmptyString, _coerceIntegral, _coerceNullToken, _coerceTextualNull, _deserializeFromArray, _deserializeFromEmpty, _deserializeFromEmptyString, _deserializeFromString, _deserializeWrappedValue, _failDoubleToIntCoercion, _findCoercionFromBlankString, _findCoercionFromEmptyArray, _findCoercionFromEmptyString, _findNullProvider, _hasTextualNull, _intOverflow, _isBlank, _isEmptyOrTextualNull, _isFalse, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _isTrue, _neitherNull, _nonNullNumber, _parseBoolean, _parseBooleanFromInt, _parseBooleanPrimitive, _parseBooleanPrimitive, _parseBytePrimitive, _parseDate, _parseDate, _parseDateFromArray, _parseDouble, _parseDouble, _parseDoublePrimitive, _parseDoublePrimitive, _parseDoublePrimitive, _parseFloatPrimitive, _parseFloatPrimitive, _parseFloatPrimitive, _parseInteger, _parseInteger, _parseIntPrimitive, _parseIntPrimitive, _parseLong, _parseLong, _parseLongPrimitive, _parseLongPrimitive, _parseShortPrimitive, _parseString, _parseString, _reportFailedNullCoerce, _shortOverflow, _verifyEndArrayForSingle, _verifyNullForPrimitive, _verifyNullForPrimitiveCoercion, _verifyNullForScalarCoercion, _verifyNumberForScalarCoercion, _verifyStringForScalarCoercion, findContentNullProvider, findContentNullStyle, findConvertingContentDeserializer, findDeserializer, findFormatFeature, findFormatOverrides, findValueNullProvider, getValueClass, getValueInstantiator, getValueType, getValueType, handledType, handleMissingEndArrayForSingle, handleNestedArrayForSingle, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer
Methods inherited from class edu.internet2.middleware.grouperClientExt.com.fasterxml.jackson.databind.JsonDeserializer
deserializeWithType, findBackReference, getAbsentValue, getDelegatee, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullValue, getNullValue, getObjectIdReader, isCachable, replaceDelegatee, unwrappingDeserializer
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Constructor Details
-
FromStringDeserializer
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Method Details
-
types
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findDeserializer
Factory method for trying to find a deserializer for one of supported types that have simple from-String serialization. -
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 classStdScalarDeserializer<T>
- Returns:
- Logical type of values this deserializer produces, if known;
null
if not
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deserialize
Description copied from class:JsonDeserializer
Method that can be called to ask implementation to deserialize JSON content into the value type this serializer handles. Returned instance is to be constructed by method itself.Pre-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 (p.currentToken() == JsonToken.START_OBJECT) { p.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.
- Specified by:
deserialize
in classJsonDeserializer<T>
- Parameters:
p
- Parsed used for reading JSON contentctxt
- Context that can be used to access information about this deserialization activity.- Returns:
- Deserialized value
- Throws:
IOException
-
_deserialize
Main method from trying to deserialize actual value from non-empty String.- Throws:
IOException
-
_shouldTrim
protected boolean _shouldTrim() -
_deserializeFromOther
protected Object _deserializeFromOther(JsonParser p, DeserializationContext ctxt, JsonToken t) throws IOException - Throws:
IOException
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_deserializeEmbedded
Overridable method to allow coercion from embedded value that is neithernull
nor directly assignable to target type. Used, for example, byUUIDDeserializer
to coerce frombyte[]
.- Throws:
IOException
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_deserializeFromEmptyString
Deprecated.- Throws:
IOException
-
_deserializeFromEmptyString
- Throws:
IOException
- Since:
- 2.12
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_deserializeFromEmptyStringDefault
- Throws:
IOException
- Since:
- 2.12
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