Class Jdk8Module
java.lang.Object
com.fasterxml.jackson.databind.Module
com.fasterxml.jackson.datatype.jdk8.Jdk8Module
- All Implemented Interfaces:
com.fasterxml.jackson.core.Versioned
public class Jdk8Module
extends com.fasterxml.jackson.databind.Module
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Nested Class Summary
Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.Module
com.fasterxml.jackson.databind.Module.SetupContext
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected boolean
SeeconfigureReadAbsentAsNull(boolean)
for details of this configuration setting.protected boolean
Configuration setting that determines whether `Optional.empty()` is considered "same as null" for serialization purposes; that is, to be filtered same as nulls are.static final boolean
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionconfigureAbsentsAsNulls
(boolean state) Deprecated.Since 2.13, no replacement, will be removed from Jackson 3.0 (when optional types will be part of core databind)configureReadAbsentAsNull
(boolean state) Method for configuring handling of "absent"Optional
values; absent meaning case where no value is found to pass via Creator method (constructor, factory method).boolean
int
hashCode()
void
setupModule
(com.fasterxml.jackson.databind.Module.SetupContext context) com.fasterxml.jackson.core.Version
version()
Methods inherited from class com.fasterxml.jackson.databind.Module
getDependencies, getTypeId
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Field Details
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DEFAULT_READ_ABSENT_AS_NULL
public static final boolean DEFAULT_READ_ABSENT_AS_NULL- See Also:
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_cfgWriteAbsentAsNull
protected boolean _cfgWriteAbsentAsNullConfiguration setting that determines whether `Optional.empty()` is considered "same as null" for serialization purposes; that is, to be filtered same as nulls are. If enabled, absent values are treated like nulls; if disabled, they are not. In either case, absent values are always considered "empty".Default value is `false` for backwards compatibility (2.5 and prior only had this behavior).
Note that this setting MUST be changed BEFORE registering the module: changes after registration will have no effect.
Note that in most cases it makes more sense to just use `NON_ABSENT` inclusion criteria for filtering out absent optionals; this setting is mostly useful for legacy use cases that predate version 2.6.
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_cfgReadAbsentAsNull
protected boolean _cfgReadAbsentAsNullSeeconfigureReadAbsentAsNull(boolean)
for details of this configuration setting.- Since:
- 2.14
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Constructor Details
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Jdk8Module
public Jdk8Module()
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Method Details
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setupModule
public void setupModule(com.fasterxml.jackson.databind.Module.SetupContext context) - Specified by:
setupModule
in classcom.fasterxml.jackson.databind.Module
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version
public com.fasterxml.jackson.core.Version version()- Specified by:
version
in interfacecom.fasterxml.jackson.core.Versioned
- Specified by:
version
in classcom.fasterxml.jackson.databind.Module
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configureAbsentsAsNulls
Deprecated.Since 2.13, no replacement, will be removed from Jackson 3.0 (when optional types will be part of core databind)Configuration method that may be used to change configuration setting_cfgHandleAbsentAsNull
: enabling means that `Optional.empty()` values are handled like Java nulls (wrt filtering on serialization); disabling that they are only treated as "empty" values, but not like native Java nulls. Recommended setting for this value is `false`. For compatibility with older versions of other "optional" values (like Guava optionals), it can be set to 'true'. The default is `false` for backwards compatibility.Note that in most cases it makes more sense to just use `NON_ABSENT` inclusion criteria for filtering out absent optionals; this setting is mostly useful for legacy use cases that predate version 2.6.
- Returns:
- This module instance, useful for chaining calls
- Since:
- 2.6
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configureReadAbsentAsNull
Method for configuring handling of "absent"Optional
values; absent meaning case where no value is found to pass via Creator method (constructor, factory method). If enabled (set totrue
) it will be deserialized asnull
; if disabled it will be read as "empty"Optional
(same as if encountering actual JSONnull
value).Default is
false
for backwards compatibility (retains behavior pre-2.14); for Jackson 3.0 default will likely be changed.- Since:
- 2.14
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hashCode
public int hashCode() -
equals
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getModuleName
- Specified by:
getModuleName
in classcom.fasterxml.jackson.databind.Module
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