Jackson 2.18.2 · com.fasterxml.jackson.datatype.jodamoney.CurrencyUnitDeserializer

Modifier and Type	Field and Description
private static final long	serialVersionUID Hides com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer.serialVersionUID.

Access	Constructor and Description
public	CurrencyUnitDeserializer()

Method Summary

Modifier and Type	Method and Description
public CurrencyUnit	deserialize(final JsonParser Parser used for reading JSON content p, final DeserializationContext Context that can be used to access information about this deserialization activity. ctxt) Implements abstract 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.

Inherited from com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer:: deserialize deserializeWithType getEmptyAccessPattern getNullAccessPattern logicalType supportsUpdate

serialVersionUID	back to summary
private static final long serialVersionUID Hides com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer.serialVersionUID.

CurrencyUnitDeserializer	back to summary
public CurrencyUnitDeserializer()

Method Detail

deserialize back to summary

deserialize	back to summary
public CurrencyUnit deserialize(final JsonParser p, final DeserializationContext ctxt) throws IOException 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", ... } Jackson consumes the two tokens (the `@class` field name and its value) in order to learn the class and select the deserializer. Thus, the stream is pointing to the FIELD_NAME for the first field after the @class. Thus, if you want your method to work correctly both with and without polymorphism, you must begin your method with: if (p.currentToken() == JsonToken.START_OBJECT) { p.nextToken(); } This results in the stream pointing to the field name, so that the two conditions align. 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:CurrencyUnit Deserialized value Annotations @Override

public CurrencyUnit deserialize(final JsonParser p, final DeserializationContext ctxt) throws IOException

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",
          ...
      }

Jackson consumes the two tokens (the @class field name and its value) in order to learn the class and select the deserializer. Thus, the stream is pointing to the FIELD_NAME for the first field after the @class. Thus, if you want your method to work correctly both with and without polymorphism, you must begin your method with:

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

This results in the stream pointing to the field name, so that the two conditions align.

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:CurrencyUnit

Deserialized value

Annotations

@Override

public Class CurrencyUnitDeserializer

Field Summary

Constructor Summary

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Field Detail

Constructor Detail

Method Detail