Module tools.jackson.databind

Package tools.jackson.databind.deser.jdk

Class JDKFromStringDeserializer

java.lang.Object

tools.jackson.databind.ValueDeserializer<T>

tools.jackson.databind.deser.std.StdDeserializer<T>

tools.jackson.databind.deser.std.StdScalarDeserializer<T>

tools.jackson.databind.deser.std.FromStringDeserializer<Object>

tools.jackson.databind.deser.jdk.JDKFromStringDeserializer

All Implemented Interfaces:

NullValueProvider, ValueInstantiator.Gettable

public class JDKFromStringDeserializer
extends FromStringDeserializer<Object>

Base class for simple deserializers that serialize values from String representation: this includes JSON Strings and other Scalar values that can be coerced into text, like Numbers and Booleans). Simple JSON String values are trimmed using 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 by ValueDeserializer.getNullValue(DeserializationContext): default implementation simply returns Java `null` but this may be overridden.
• Empty String (after trimming) will result in FromStringDeserializer._deserializeFromEmptyString(tools.jackson.databind.DeserializationContext) getting called, and return value being returned as deserialization: default implementation simply returns `null`.

Nested Class Summary

Nested classes/interfaces inherited from class tools.jackson.databind.ValueDeserializer

ValueDeserializer.None

Field Summary

Fields

Modifier and Type	Field	Description
protected final int	_kind
static final int	STD_CHARSET
static final int	STD_CLASS
static final int	STD_CURRENCY
static final int	STD_FILE
static final int	STD_INET_ADDRESS
static final int	STD_INET_SOCKET_ADDRESS
static final int	STD_JAVA_TYPE
static final int	STD_LOCALE
static final int	STD_PATH
static final int	STD_PATTERN
static final int	STD_TIME_ZONE
static final int	STD_URI
static final int	STD_URL

Fields inherited from class tools.jackson.databind.deser.std.StdDeserializer

_valueClass, _valueType, F_MASK_INT_COERCIONS

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	JDKFromStringDeserializer(Class<?> valueType, int kind)

Method Summary

Modifier and Type	Method	Description
Object	_deserialize(String value, DeserializationContext ctxt)	Main method from trying to deserialize actual value from non-empty String.
protected Object	_deserializeFromEmptyStringDefault(DeserializationContext ctxt)
protected int	_firstHyphenOrUnderscore(String str)
protected boolean	_shouldTrim()
static JDKFromStringDeserializer	findDeserializer(Class<?> rawType)	Factory method for trying to find a deserializer for one of supported types that have simple from-String serialization.
Object	getEmptyValue(DeserializationContext ctxt)	Method called to determine value to be used for "empty" values (most commonly when deserializing from empty JSON Strings).
static Class<?>[]	types()

Methods inherited from class tools.jackson.databind.deser.std.FromStringDeserializer

_deserializeEmbedded, _deserializeFromEmptyString, _deserializeFromOther, deserialize, logicalType

Methods inherited from class tools.jackson.databind.deser.std.StdScalarDeserializer

deserialize, deserializeWithType, getEmptyAccessPattern, getNullAccessPattern, supportsUpdate

Methods inherited from class tools.jackson.databind.deser.std.StdDeserializer

_byteOverflow, _checkBooleanToStringCoercion, _checkCoercionFail, _checkDoubleSpecialValue, _checkFloatSpecialValue, _checkFloatToIntCoercion, _checkFloatToStringCoercion, _checkFromStringCoercion, _checkFromStringCoercion, _checkIntToFloatCoercion, _checkIntToStringCoercion, _checkTextualNull, _checkToStringCoercion, _coerceBooleanFromInt, _coercedTypeDesc, _coercedTypeDesc, _coerceIntegral, _deserializeFromArray, _deserializeFromEmptyString, _deserializeFromString, _deserializeWrappedValue, _findCoercionFromBlankString, _findCoercionFromEmptyArray, _findCoercionFromEmptyString, _findNullProvider, _hasTextualNull, _intOverflow, _isBlank, _isFalse, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _isTrue, _neitherNull, _nonNullNumber, _parseBoolean, _parseBooleanPrimitive, _parseBytePrimitive, _parseDate, _parseDate, _parseDateFromArray, _parseDouble, _parseDoublePrimitive, _parseDoublePrimitive, _parseFloatPrimitive, _parseFloatPrimitive, _parseInteger, _parseInteger, _parseIntPrimitive, _parseIntPrimitive, _parseLong, _parseLong, _parseLongPrimitive, _parseLongPrimitive, _parseShortPrimitive, _parseString, _reportFailedNullCoerce, _shortOverflow, _verifyEndArrayForSingle, _verifyNullForPrimitive, _verifyNullForPrimitiveCoercion, _wrapIOFailure, findContentNullProvider, findContentNullStyle, findConvertingContentDeserializer, findDeserializer, findFormatFeature, findFormatOverrides, findValueNullProvider, getValueInstantiator, getValueType, getValueType, handledType, handleMissingEndArrayForSingle, handleNestedArrayForSingle, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer

Methods inherited from class tools.jackson.databind.ValueDeserializer

createContextual, deserializeWithType, findBackReference, getAbsentValue, getDelegatee, getKnownPropertyNames, getNullValue, getObjectIdReader, isCachable, replaceDelegatee, resolve, unwrappingDeserializer

Methods inherited from class java.lang.Object

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

Field Details

STD_FILE

public static final int STD_FILE

See Also:

• Constant Field Values

STD_URL

public static final int STD_URL

See Also:

• Constant Field Values

STD_URI

public static final int STD_URI

See Also:

• Constant Field Values

STD_PATH

public static final int STD_PATH

See Also:

• Constant Field Values

STD_CLASS

public static final int STD_CLASS

See Also:

• Constant Field Values

STD_JAVA_TYPE

public static final int STD_JAVA_TYPE

See Also:

• Constant Field Values

STD_CURRENCY

public static final int STD_CURRENCY

See Also:

• Constant Field Values

STD_PATTERN

public static final int STD_PATTERN

See Also:

• Constant Field Values

STD_LOCALE

public static final int STD_LOCALE

See Also:

• Constant Field Values

STD_CHARSET

public static final int STD_CHARSET

See Also:

• Constant Field Values

STD_TIME_ZONE

public static final int STD_TIME_ZONE

See Also:

• Constant Field Values

STD_INET_ADDRESS

public static final int STD_INET_ADDRESS

See Also:

• Constant Field Values

STD_INET_SOCKET_ADDRESS

public static final int STD_INET_SOCKET_ADDRESS

See Also:

• Constant Field Values

_kind

protected final int _kind

Constructor Details

JDKFromStringDeserializer

protected JDKFromStringDeserializer(Class<?> valueType,
 int kind)

Method Details

types

public static Class<?>[] types()

findDeserializer

public static JDKFromStringDeserializer findDeserializer(Class<?> rawType)

Factory method for trying to find a deserializer for one of supported types that have simple from-String serialization.

_deserialize

public Object _deserialize(String value,
 DeserializationContext ctxt)
                    throws JacksonException,
MalformedURLException,
UnknownHostException

Description copied from class: FromStringDeserializer

Main method from trying to deserialize actual value from non-empty String.

Specified by:

_deserialize in class FromStringDeserializer<Object>

Throws:

JacksonException

MalformedURLException

UnknownHostException

_shouldTrim

protected boolean _shouldTrim()

Overrides:

_shouldTrim in class FromStringDeserializer<Object>

getEmptyValue

public Object getEmptyValue(DeserializationContext ctxt)

Description copied from class: ValueDeserializer

Method called to determine value to be used for "empty" values (most commonly when deserializing from empty JSON Strings). Usually this is same as ValueDeserializer.getNullValue(tools.jackson.databind.DeserializationContext) (which in turn is usually simply Java null), but it can be overridden for specific types. Or, if type should never be converted from empty String, method can also throw an exception.

This method may be called once, or multiple times, depending on what ValueDeserializer.getEmptyAccessPattern() returns.

Default implementation simply calls ValueDeserializer.getNullValue(tools.jackson.databind.DeserializationContext) and returns value.

Overrides:

getEmptyValue in class ValueDeserializer<Object>

_deserializeFromEmptyStringDefault

protected Object _deserializeFromEmptyStringDefault(DeserializationContext ctxt)
                                             throws JacksonException

Overrides:

_deserializeFromEmptyStringDefault in class FromStringDeserializer<Object>

Throws:

JacksonException

_firstHyphenOrUnderscore

protected int _firstHyphenOrUnderscore(String str)