public Class EnumMapDeserializer

Since

2.9

Annotations

@Deprecated

Implements com.fasterxml.jackson.databind.deser.ContextualDeserializer.createContextual.

Method called to finalize setup of this deserializer, when it is known for which property deserializer is needed for.

Parameters

ctxt:DeserializationContext

Doc from com.fasterxml.jackson.databind.deser.ContextualDeserializer.createContextual.

Deserialization context to access configuration, additional deserializers that may be needed by this deserializer

property:BeanProperty

Doc from com.fasterxml.jackson.databind.deser.ContextualDeserializer.createContextual.

Method, field or constructor parameter that represents the property (and is used to assign deserialized value). Should be available; but there may be cases where caller cannot provide it and null is passed instead (in which case impls usually pass 'this' deserializer as is)

Returns:JsonDeserializer<?>

Doc from com.fasterxml.jackson.databind.deser.ContextualDeserializer.createContextual.

Deserializer to use for deserializing values of specified property; may be this instance or a new instance.

Annotations

@Override

Implements abstract com.fasterxml.jackson.databind.JsonDeserializer.deserialize.

Doc from com.fasterxml.jackson.databind.JsonDeserializer.deserialize.

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",
          ...
      }
  

       if (p.currentToken() == JsonToken.START_OBJECT) {
         p.nextToken();
       }
  

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).

Handling null values (JsonToken.VALUE_NULL)
: Note that this method is never called for the JSON null literal to avoid every deserializer from having to handle null values. Instead, the JsonDeserializer#getNullValue(DeserializationContext) method is called to produce a null value. To influence null handling, custom deserializers should override JsonDeserializer#getNullValue(DeserializationContext) and usually also JsonDeserializer#getNullAccessPattern().

Parameters

p:JsonParser

Parser used for reading JSON content

ctxt:DeserializationContext

Context that can be used to access information about this deserialization activity.

Returns:EnumMap<?, ?>

Deserialized value

Annotations

@Override

Overrides com.fasterxml.jackson.databind.JsonDeserializer.deserialize.

Doc from com.fasterxml.jackson.databind.JsonDeserializer.deserialize.

Alternate deserialization method (compared to the most commonly used, deserialize(JsonParser, DeserializationContext)), which takes in initialized value instance, to be configured and/or populated by deserializer. Method is not necessarily used (or supported) by all types (it will not work for immutable types, for obvious reasons): most commonly it is used for Collections and Maps. It may be used both with "updating readers" (for POJOs) and when Collections and Maps use "getter as setter".

Default implementation just throws UnsupportedOperationException, to indicate that types that do not explicitly add support do not necessarily support update-existing-value operation (esp. immutable types)

Annotations

@Override

Overrides com.fasterxml.jackson.databind.deser.std.StdDeserializer.deserializeWithType.

Doc from com.fasterxml.jackson.databind.deser.std.StdDeserializer.deserializeWithType.

Base implementation that does not assume specific type inclusion mechanism. Sub-classes are expected to override this method if they are to handle type information.

Parameters

typeDeserializer:TypeDeserializer

Doc from com.fasterxml.jackson.databind.JsonDeserializer.deserializeWithType.

Deserializer to use for handling type information

Annotations

@Override

Implements abstract com.fasterxml.jackson.databind.deser.std.ContainerDeserializerBase.getContentDeserializer.

Doc from com.fasterxml.jackson.databind.deser.std.ContainerDeserializerBase.getContentDeserializer.

Accesor for deserializer use for deserializing content values.

Annotations

@Override

Overrides com.fasterxml.jackson.databind.deser.std.ContainerDeserializerBase.getEmptyValue.

Doc from com.fasterxml.jackson.databind.JsonDeserializer.getEmptyValue.

Method called to determine value to be used for "empty" values (most commonly when deserializing from empty JSON Strings). Usually this is same as getNullValue (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 getEmptyAccessPattern() returns.

Default implementation simply calls getNullValue and returns value.

Annotations

@Override

Overrides com.fasterxml.jackson.databind.deser.std.StdDeserializer.getValueInstantiator.

Implements com.fasterxml.jackson.databind.deser.ValueInstantiator.Gettable.getValueInstantiator.

Annotations

@Override

Overrides com.fasterxml.jackson.databind.JsonDeserializer.isCachable.

Because of costs associated with constructing Enum resolvers, let's cache instances by default.

Annotations

@Override

Overrides com.fasterxml.jackson.databind.JsonDeserializer.logicalType.

Doc from com.fasterxml.jackson.databind.JsonDeserializer.logicalType.

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.

Returns:LogicalType

Logical type of values this deserializer produces, if known; null if not

Annotations

@Override

Implements com.fasterxml.jackson.databind.deser.ResolvableDeserializer.resolve.

Doc from com.fasterxml.jackson.databind.deser.ResolvableDeserializer.resolve.

Method called after deserializer instance has been constructed (and registered as necessary by provider objects), but before it has returned it to the caller. Called object can then resolve its dependencies to other types, including self-references (direct or indirect).

Parameters

ctxt:DeserializationContext

Context to use for accessing configuration, resolving secondary deserializers

Annotations

@Override