org.codehaus.jackson.map.deser.std

Class StdDeserializer.NumberDeserializer

java.lang.Object

org.codehaus.jackson.map.JsonDeserializer<T>

org.codehaus.jackson.map.deser.std.StdDeserializer<T>

org.codehaus.jackson.map.deser.std.StdScalarDeserializer<Number>

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

Constructors

Constructor and Description
StdDeserializer.NumberDeserializer()

Method Summary

Methods

Modifier and Type	Method and Description
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, _parseBooleanFromNumber, _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