Examples of com.fasterxml.jackson.databind.jsontype.TypeDeserializer

Package com.fasterxml.jackson.databind.jsontype

Examples of com.fasterxml.jackson.databind.jsontype.TypeDeserializer

com.fasterxml.jackson.databind.jsontype.TypeDeserializer
Interface for deserializing type information from JSON content, to type-safely deserialize data into correct polymorphic instance (when type inclusion has been enabled for type handled).
Separate deserialization methods are needed because serialized form for inclusion mechanism {@link As#PROPERTY}is slighty different if value is not expressed as JSON Object: and as such both type deserializer and serializer need to JSON Object form (array, object or other (== scalar)) being used.

        // [JACKSON-526]: implicit arrays from single values?
        if (!ctxt.isEnabled(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY)) {
            throw ctxt.mappingException(_collectionType.getRawClass());
        }
        JsonDeserializer<Object> valueDes = _valueDeserializer;
        final TypeDeserializer typeDeser = _valueTypeDeserializer;
        JsonToken t = jp.getCurrentToken();


        Object value;
        
        if (t == JsonToken.VALUE_NULL) {

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        if (vd == null) {
            vd = ctxt.findContextualValueDeserializer(_mapType.getContentType(), property);
        } else { // if directly assigned, probably not yet contextual, so:
            vd = ctxt.handleSecondaryContextualization(vd, property);
        }
        TypeDeserializer vtd = _valueTypeDeserializer;
        if (vtd != null) {
            vtd = vtd.forProperty(property);
        }
        HashSet<String> ignored = _ignorableProperties;
        AnnotationIntrospector intr = ctxt.getAnnotationIntrospector();
        if (intr != null && property != null) {
            String[] moreToIgnore = intr.findPropertiesToIgnore(property.getMember());

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        if (t == JsonToken.START_OBJECT) {
            t = jp.nextToken();
        }
        final KeyDeserializer keyDes = _keyDeserializer;
        final JsonDeserializer<Object> valueDes = _valueDeserializer;
        final TypeDeserializer typeDeser = _valueTypeDeserializer;


        MapReferringAccumulator referringAccumulator = null;
        boolean useObjectId = valueDes.getObjectIdReader() != null;
        if (useObjectId) {
            referringAccumulator = new MapReferringAccumulator(_mapType.getContentType().getRawClass(), result);

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        JsonToken t = jp.getCurrentToken();
        if (t == JsonToken.START_OBJECT) {
            t = jp.nextToken();
        }
        final JsonDeserializer<Object> valueDes = _valueDeserializer;
        final TypeDeserializer typeDeser = _valueTypeDeserializer;
        MapReferringAccumulator referringAccumulator = null;
        boolean useObjectId = valueDes.getObjectIdReader() != null;
        if (useObjectId) {
            referringAccumulator = new MapReferringAccumulator(_mapType.getContentType().getRawClass(), result);
        }

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        JsonToken t = jp.getCurrentToken();
        if (t == JsonToken.START_OBJECT) {
            t = jp.nextToken();
        }
        final JsonDeserializer<Object> valueDes = _valueDeserializer;
        final TypeDeserializer typeDeser = _valueTypeDeserializer;
        for (; t == JsonToken.FIELD_NAME; t = jp.nextToken()) {
            String propName = jp.getCurrentName();
            t = jp.nextToken(); // to get to value
            if (_ignorableProperties != null && _ignorableProperties.contains(propName)) {
                jp.skipChildren(); // and skip it (in case of array/object)

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    public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
            BeanProperty property) throws JsonMappingException
    {
        KeyDeserializer keyDeser = _keyDeserializer;
        JsonDeserializer<?> deser = _valueDeserializer;
        TypeDeserializer typeDeser = _typeDeserializerForValue;
        // Do we need any contextualization?
        if ((keyDeser != null) && (deser != null) && (typeDeser == null)) { // nope
            return this;
        }
        if (keyDeser == null) {
            keyDeser = ctxt.findKeyDeserializer(_mapType.getKeyType(), property);
        }
        if (deser == null) {
            deser = ctxt.findContextualValueDeserializer(_mapType.getContentType(), property);
        }
        if (typeDeser != null) {
            typeDeser = typeDeser.forProperty(property);
        }
        return withResolved(keyDeser, typeDeser, deser);
    }

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    @Override
    protected T _deserializeContents(JsonParser jp, DeserializationContext ctxt)
            throws IOException, JsonProcessingException {
        JsonDeserializer<?> valueDes = _valueDeserializer;
        JsonToken t;
        final TypeDeserializer typeDeser = _typeDeserializerForValue;
        // No way to pass actual type parameter; but does not matter, just
        // compiler-time fluff:
        ImmutableCollection.Builder<Object> builder = createBuilder();


        while ((t = jp.nextToken()) != JsonToken.END_ARRAY) {

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        JsonDeserializer<?> ed = elementDeserializer;
        if (ed == null) {
            ed = ctxt.findContextualValueDeserializer(type.getContentType(), property);
        }
        // Type deserializer is slightly different; must be passed, but needs to become contextual:
        TypeDeserializer etd = elementTypeDeserializer;
        if (etd != null && property != null) {
            etd = etd.forProperty(property);
        }
        return new MultimapDeserializer(type, kd, etd, ed, this.creatorMethod);
    }

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    @Override
    protected T _deserializeEntries(JsonParser jp, DeserializationContext ctxt) throws IOException,
            JsonProcessingException {
        final KeyDeserializer keyDes = _keyDeserializer;
        final JsonDeserializer<?> valueDes = _valueDeserializer;
        final TypeDeserializer typeDeser = _typeDeserializerForValue;
    
        ImmutableMap.Builder<Object, Object> builder = createBuilder();
        for (; jp.getCurrentToken() == JsonToken.FIELD_NAME; jp.nextToken()) {
            // Must point to field name now
            String fieldName = jp.getCurrentName();

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                _factory, type);
        if (deser == null) { // can this occur?
            return null;
        }
        deser = (JsonDeserializer<Object>) handleSecondaryContextualization(deser, null);
        TypeDeserializer typeDeser = _factory.findTypeDeserializer(_config, type);
        if (typeDeser != null) {
            // important: contextualize to indicate this is for root value
            typeDeser = typeDeser.forProperty(null);
            return new TypeWrappedDeserializer(typeDeser, deser);
        }
        return deser;
    }

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