org.codehaus.jackson.map.deser.std
Class StdDeserializer.NumberDeserializer

java.lang.Object
  extended by org.codehaus.jackson.map.JsonDeserializer<T>
      extended by org.codehaus.jackson.map.deser.std.StdDeserializer<T>
          extended by org.codehaus.jackson.map.deser.std.StdScalarDeserializer<Number>
              extended by org.codehaus.jackson.map.deser.std.StdDeserializer.NumberDeserializer
Enclosing class:
StdDeserializer<T>

public static final class StdDeserializer.NumberDeserializer
extends StdScalarDeserializer<Number>

For type Number.class, we can just rely on type mappings that plain JsonParser.getNumberValue() returns.

Since 1.5, there is one additional complication: some numeric types (specifically, int/Integer and double/Double) are "non-typed"; meaning that they will NEVER be output with type information. But other numeric types may need such type information. This is why deserializeWithType(org.codehaus.jackson.JsonParser, org.codehaus.jackson.map.DeserializationContext, org.codehaus.jackson.map.TypeDeserializer) must be overridden.


Nested Class Summary
 
Nested classes/interfaces inherited from class org.codehaus.jackson.map.deser.std.StdDeserializer
StdDeserializer.BigDecimalDeserializer, StdDeserializer.BigIntegerDeserializer, StdDeserializer.BooleanDeserializer, StdDeserializer.ByteDeserializer, StdDeserializer.CharacterDeserializer, StdDeserializer.DoubleDeserializer, StdDeserializer.FloatDeserializer, StdDeserializer.IntegerDeserializer, StdDeserializer.LongDeserializer, StdDeserializer.NumberDeserializer, StdDeserializer.PrimitiveOrWrapperDeserializer<T>, StdDeserializer.ShortDeserializer, StdDeserializer.SqlDateDeserializer, StdDeserializer.StackTraceElementDeserializer
 
Nested classes/interfaces inherited from class org.codehaus.jackson.map.JsonDeserializer
JsonDeserializer.None
 
Field Summary
 
Fields inherited from class org.codehaus.jackson.map.deser.std.StdDeserializer
_valueClass
 
Constructor Summary
StdDeserializer.NumberDeserializer()
           
 
Method Summary
 Number deserialize(JsonParser jp, DeserializationContext ctxt)
          Method that can be called to ask implementation to deserialize JSON content into the value type this serializer handles.
 Object deserializeWithType(JsonParser jp, DeserializationContext ctxt, TypeDeserializer typeDeserializer)
          As mentioned in class Javadoc, there is additional complexity in handling potentially mixed type information here.
 
Methods inherited from class org.codehaus.jackson.map.deser.std.StdDeserializer
_parseBoolean, _parseBooleanPrimitive, _parseByte, _parseDate, _parseDouble, _parseDoublePrimitive, _parseFloat, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseShort, _parseShortPrimitive, findDeserializer, getValueClass, getValueType, handleUnknownProperty, isDefaultSerializer, parseDouble, reportUnknownProperty
 
Methods inherited from class org.codehaus.jackson.map.JsonDeserializer
deserialize, getEmptyValue, getNullValue, unwrappingDeserializer
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

StdDeserializer.NumberDeserializer

public StdDeserializer.NumberDeserializer()
Method Detail

deserialize

public Number deserialize(JsonParser jp,
                          DeserializationContext ctxt)
                   throws IOException,
                          JsonProcessingException
Description copied from class: JsonDeserializer
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. 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).

Note that this method is never called for JSON null literal, and thus deserializers need (and should) not check for it.

Specified by:
deserialize in class JsonDeserializer<Number>
Parameters:
jp - Parsed used for reading JSON content
ctxt - Context that can be used to access information about this deserialization activity.
Returns:
Deserializer value
Throws:
IOException
JsonProcessingException

deserializeWithType

public Object deserializeWithType(JsonParser jp,
                                  DeserializationContext ctxt,
                                  TypeDeserializer typeDeserializer)
                           throws IOException,
                                  JsonProcessingException
As mentioned in class Javadoc, there is additional complexity in handling potentially mixed type information here. Because of this, we must actually check for "raw" integers and doubles first, before calling type deserializer.

Overrides:
deserializeWithType in class StdScalarDeserializer<Number>
typeDeserializer - Deserializer to use for handling type information
Throws:
IOException
JsonProcessingException