com.fasterxml.jackson.databind

Class PropertyNamingStrategy

java.lang.Object

com.fasterxml.jackson.databind.PropertyNamingStrategy

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

PropertyNamingStrategy.PropertyNamingStrategyBase

public abstract class PropertyNamingStrategy
extends Object
implements Serializable

Class that defines how names of JSON properties ("external names") are derived from names of POJO methods and fields ("internal names"), in cases where they are not auto-detected and no explicit annotations exist for naming. Methods are passed information about POJO member for which name is needed, as well as default name that would be used if no custom strategy was used.

Default implementation returns suggested ("default") name unmodified.

Note that the strategy is guaranteed to be called once per logical property (which may be represented by multiple members; such as pair of a getter and a setter), but may be called for each: implementations should not count on exact number of times, and should work for any member that represent a property.

In absence of a registered custom strategy, default Java property naming strategy is used, which leaves field names as is, and removes set/get/is prefix from methods (as well as lower-cases initial sequence of capitalized characters).

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PropertyNamingStrategy.LowerCaseStrategy Simple strategy where external name simply only uses lower-case characters, and no separators.
static class	PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy A PropertyNamingStrategy that translates typical camel case Java property names to lower case JSON element names, separated by underscores.
static class	PropertyNamingStrategy.PascalCaseStrategy A PropertyNamingStrategy that translates typical camelCase Java property names to PascalCase JSON element names (i.e., with a capital first letter).
static class	PropertyNamingStrategy.PropertyNamingStrategyBase

Field Summary

Fields

Modifier and Type	Field and Description
static PropertyNamingStrategy	CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES See PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy for details.
static PropertyNamingStrategy	LOWER_CASE See PropertyNamingStrategy.LowerCaseStrategy for details.
static PropertyNamingStrategy	PASCAL_CASE_TO_CAMEL_CASE See PropertyNamingStrategy.PascalCaseStrategy for details.

Constructor Summary

Constructors

Constructor and Description
PropertyNamingStrategy()

Method Summary

Modifier and Type	Method and Description
String	nameForConstructorParameter(MapperConfig<?> config, AnnotatedParameter ctorParam, String defaultName) Method called to find external name (name used in JSON) for given logical POJO property, as defined by given constructor parameter; typically called when building a deserializer (but not necessarily only then).
String	nameForField(MapperConfig<?> config, AnnotatedField field, String defaultName) Method called to find external name (name used in JSON) for given logical POJO property, as defined by given field.
String	nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) Method called to find external name (name used in JSON) for given logical POJO property, as defined by given getter method; typically called when building a serializer.
String	nameForSetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) Method called to find external name (name used in JSON) for given logical POJO property, as defined by given setter method; typically called when building a deserializer (but not necessarily only then).

Methods inherited from class java.lang.Object

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

Field Detail

CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES

public static final PropertyNamingStrategy CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES

See PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy for details.

PASCAL_CASE_TO_CAMEL_CASE

public static final PropertyNamingStrategy PASCAL_CASE_TO_CAMEL_CASE

See PropertyNamingStrategy.PascalCaseStrategy for details.

Since:

2.1

LOWER_CASE

public static final PropertyNamingStrategy LOWER_CASE

See PropertyNamingStrategy.LowerCaseStrategy for details.

Since:

2.4

Constructor Detail

PropertyNamingStrategy

public PropertyNamingStrategy()

Method Detail

nameForField

public String nameForField(MapperConfig<?> config,
                           AnnotatedField field,
                           String defaultName)

Method called to find external name (name used in JSON) for given logical POJO property, as defined by given field.

Parameters:

config - Configuration in used: either SerializationConfig or DeserializationConfig, depending on whether method is called during serialization or deserialization

field - Field used to access property

defaultName - Default name that would be used for property in absence of custom strategy

Returns:

Logical name to use for property that the field represents

nameForGetterMethod

public String nameForGetterMethod(MapperConfig<?> config,
                                  AnnotatedMethod method,
                                  String defaultName)

Method called to find external name (name used in JSON) for given logical POJO property, as defined by given getter method; typically called when building a serializer. (but not always -- when using "getter-as-setter", may be called during deserialization)

Parameters:

config - Configuration in used: either SerializationConfig or DeserializationConfig, depending on whether method is called during serialization or deserialization

method - Method used to access property.

defaultName - Default name that would be used for property in absence of custom strategy

Returns:

Logical name to use for property that the method represents

nameForSetterMethod

public String nameForSetterMethod(MapperConfig<?> config,
                                  AnnotatedMethod method,
                                  String defaultName)

Method called to find external name (name used in JSON) for given logical POJO property, as defined by given setter method; typically called when building a deserializer (but not necessarily only then).

Parameters:

config - Configuration in used: either SerializationConfig or DeserializationConfig, depending on whether method is called during serialization or deserialization

method - Method used to access property.

defaultName - Default name that would be used for property in absence of custom strategy

Returns:

Logical name to use for property that the method represents

nameForConstructorParameter

public String nameForConstructorParameter(MapperConfig<?> config,
                                          AnnotatedParameter ctorParam,
                                          String defaultName)

Method called to find external name (name used in JSON) for given logical POJO property, as defined by given constructor parameter; typically called when building a deserializer (but not necessarily only then).

Parameters:

config - Configuration in used: either SerializationConfig or DeserializationConfig, depending on whether method is called during serialization or deserialization

ctorParam - Constructor parameter used to pass property.

defaultName - Default name that would be used for property in absence of custom strategy