Package com.fasterxml.jackson.databind

Class PropertyNamingStrategy

java.lang.Object
com.fasterxml.jackson.databind.PropertyNamingStrategy
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
PropertyNamingStrategies.NamingBase, PropertyNamingStrategy.PropertyNamingStrategyBase
public 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 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 (empty) implementation returns suggested ("implicit" or "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. Also note that calls are made during construction of serializers and deserializers which are typically cached, and not for every time serializer or deserializer is called.

In absence of a registered custom strategy, the 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).

NOTE! Since 2.12 sub-classes defined here (as well as static singleton instances thereof) are deprecated due to databind#2715. Please use constants and classes in PropertyNamingStrategies instead.

See Also:

  • Field Details

  • Constructor Details

    • PropertyNamingStrategy

      public PropertyNamingStrategy()

  • Method Details

    • 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