com.fasterxml.jackson.databind.introspect.BasicBeanDescription Java Examples

@Override
public HiveProxyingSubScan deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
  final JsonNode node = jsonParser.getCodec().readTree(jsonParser);

  final String pluginName = node.get("pluginName").asText();
  final CatalogService catalogService = (CatalogService) deserializationContext
    .findInjectableValue(CatalogService.class.getName(), null, null);

  final StoragePluginCreator.PF4JStoragePlugin plugin = catalogService.getSource(pluginName);
  final Class<? extends HiveProxiedSubScan> scanClazz = plugin.getSubScanClass();

  final JavaType scanType = deserializationContext.getTypeFactory().constructType(scanClazz);
  final BasicBeanDescription description = deserializationContext.getConfig().introspect(scanType);
  final JsonDeserializer<Object> subScanDeserializer = deserializationContext.getFactory().createBeanDeserializer(
    deserializationContext, scanType, description);

  if (subScanDeserializer instanceof ResolvableDeserializer) {
    ((ResolvableDeserializer) subScanDeserializer).resolve(deserializationContext);
  }

  final JsonParser movedParser = jsonParser.getCodec().treeAsTokens(node.get("wrappedHiveScan"));
  deserializationContext.getConfig().initialize(movedParser);

  if (movedParser.getCurrentToken() == null) {
    movedParser.nextToken();
  }

  final HiveProxiedSubScan scan = (HiveProxiedSubScan) subScanDeserializer.deserialize(movedParser, deserializationContext);
  return new HiveProxyingSubScan(pluginName, scan);
}
 

@Override
public HiveProxyingOrcScanFilter deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
  // TODO: Optimize performance as described in https://dremio.atlassian.net/browse/DX-17732
  final JsonNode node = jsonParser.getCodec().readTree(jsonParser);

  final String pluginName = node.get(HiveProxyingOrcScanFilter.JSON_PROP_PLUGINNAME).asText();
  final CatalogService catalogService = (CatalogService) deserializationContext
    .findInjectableValue(CatalogService.class.getName(), null, null);

  final StoragePluginCreator.PF4JStoragePlugin plugin = catalogService.getSource(pluginName);
  final Class<? extends HiveProxiedOrcScanFilter> scanClazz = plugin.getOrcScanFilterClass();

  final JavaType scanType = deserializationContext.getTypeFactory().constructType(scanClazz);
  final BasicBeanDescription description = deserializationContext.getConfig().introspect(scanType);
  final JsonDeserializer<Object> orcScanFilterDeserializer = deserializationContext.getFactory().createBeanDeserializer(
    deserializationContext, scanType, description);

  if (orcScanFilterDeserializer instanceof ResolvableDeserializer) {
    ((ResolvableDeserializer) orcScanFilterDeserializer).resolve(deserializationContext);
  }

  final JsonParser movedParser = jsonParser.getCodec().treeAsTokens(node.get(HiveProxyingOrcScanFilter.JSON_PROP_WRAPPEDHIVEORCSCANFILTER));
  deserializationContext.getConfig().initialize(movedParser);

  if (movedParser.getCurrentToken() == null) {
    movedParser.nextToken();
  }

  final HiveProxiedOrcScanFilter orcScanFilter = (HiveProxiedOrcScanFilter) orcScanFilterDeserializer.deserialize(movedParser, deserializationContext);
  return new HiveProxyingOrcScanFilter(pluginName, orcScanFilter);
}
 

@Override
public void serialize(Entity entity, JsonGenerator gen, SerializerProvider serializers) throws IOException {
    gen.writeStartObject();
    try {
        BasicBeanDescription beanDescription = serializers.getConfig().introspect(serializers.constructType(entity.getClass()));
        List<BeanPropertyDefinition> properties = beanDescription.findProperties();
        for (BeanPropertyDefinition property : properties) {
            serializeProperty(property, entity, properties, gen, serializers, beanDescription);
        }
    } catch (IOException | RuntimeException exc) {
        throw new IOException("could not serialize Entity", exc);
    } finally {
        gen.writeEndObject();
    }
}
 

private void serializeProperty(
        BeanPropertyDefinition property,
        Entity entity,
        List<BeanPropertyDefinition> properties,
        JsonGenerator gen,
        SerializerProvider serializers,
        BasicBeanDescription beanDescription) throws IOException {

    if (property.getAccessor() == null) {
        LOGGER.warn("Null Accessor found for {}.{}. Missing @JsonIgnore?", entity.getEntityType(), property.getName());
        return;
    }
    // 0. check if it should be serialized
    // If not, we still have to check if it is expanded, hence no
    // direct continue.
    boolean selected = true;
    Set<String> selectedProperties = entity.getSelectedPropertyNames();
    if (selectedProperties != null && !selectedProperties.contains(property.getName())) {
        selected = false;
    }
    // 1. is it a NavigableElement?
    if (NavigableElement.class.isAssignableFrom(property.getAccessor().getRawType())) {
        selected = serialiseNavigationElement(property, entity, selected, gen);
    }
    if (!selected) {
        return;
    }
    // 2. check if property has CustomSerialization annotation -> use custom serializer
    Annotation annotation = property.getAccessor().getAnnotation(CustomSerialization.class);
    if (annotation != null) {
        serializeFieldCustomized(
                entity,
                gen,
                property,
                properties,
                (CustomSerialization) annotation);
    } else {
        serializeField(entity, gen, serializers, beanDescription, property);
    }
    // 3. check if property is EntitySet than write count if needed.
    if (EntitySet.class.isAssignableFrom(property.getAccessor().getRawType())) {
        writeCountNextlinkForSet(property, entity, gen);
    }
}
 

/**
 * Use jackson serialization api to extract all configuration values with paths from configuration object.
 * Always analyze types, even if actual branch is not present at all (null value) in order to always bind
 * nulls and avoid "Schrodinger's binding" case. In short, bindings should not depend on configuration values
 * (presence).
 * <p>
 * Still, bindings may vary: for example, bound implementations may differ (best example is dropwizard server type),
 * as a consequences, parsed type may be different and so different properties paths could be recognized.
 *
 * @param config  jackson serialization config
 * @param content currently parsed paths
 * @param type    analyzed part type
 * @param object  analyzed part instance (may be null)
 * @return all configuration paths values
 */
@SuppressWarnings("checkstyle:CyclomaticComplexity")
private static List<ConfigPath> resolvePaths(final SerializationConfig config,
                                             final ConfigPath root,
                                             final List<ConfigPath> content,
                                             final Class type,
                                             final Object object,
                                             final GenericsContext genericsContext) {
    final BasicBeanDescription description = config.introspect(
            config.constructType(type)
    );

    for (BeanPropertyDefinition prop : description.findProperties()) {
        // ignore write-only or groovy special property
        if (!prop.couldSerialize() || prop.getName().equals("metaClass")) {
            continue;
        }
        final Object value;
        // if configuration doesn't expect serialization and throws error on access
        // (like netflix dynamic properties) it should not break app startup
        try {
            value = readValue(prop.getAccessor(), object);
        } catch (Exception ex) {
            LOGGER.warn("Can't bind configuration path '{}' due to {}: {}. Enable debug logs to see "
                            + "complete stack trace or use @JsonIgnore on property getter.",
                    fullPath(root, prop), ex.getClass().getSimpleName(), ex.getMessage());
            LOGGER.debug("Complete error: ", ex);
            continue;
        }

        final ConfigPath item = createItem(root, prop, value, genericsContext);
        content.add(item);
        if (root != null) {
            root.getChildren().add(item);
        }

        if (item.isCustomType() && !detectRecursion(item)) {
            // build generics context for actual value type (if not null)
            final GenericsContext subContext = prop.getGetter() != null
                    ? genericsContext.method(prop.getGetter().getAnnotated()).returnTypeAs(item.getValueType())
                    : genericsContext.fieldTypeAs(prop.getField().getAnnotated(), item.getValueType());

            resolvePaths(config, item, content, item.getValueType(),
                    item.getValue(), subContext);
        }
    }
    if (root != null) {
        // simple properties goes up and composite objects go lower (both groups sorted alphabetically)
        root.getChildren().sort(Comparator.comparing(o -> (o.isCustomType() ? 'b' : 'a') + o.getPath()));
    }
    return content;
}