Java Code Examples for com.fasterxml.jackson.core.JsonParser#isExpectedStartObjectToken()

private Map<String, Object> readMap(SdkField<?> field, JsonParser p, DeserializationContext ctxt) throws IOException {
    if (!p.isExpectedStartObjectToken()) {
        throw new JsonMappingException(p, "Expected start of object token for Map got " + p.currentToken());
    }

    Map<String, Object> value = new LinkedHashMap<>();
    MapTrait trait = field.getTrait(MapTrait.class);
    SdkField<?> valueType = trait.valueFieldInfo();
    while (p.nextToken() != JsonToken.END_OBJECT) {
        if (p.currentToken() != JsonToken.FIELD_NAME) {
            throw new JsonMappingException(p, "Expecting String key for map got " + p.currentToken());
        }
        String fieldName = p.getCurrentName();
        // progress to next token
        p.nextToken();
        value.put(fieldName, readObject(valueType, p, ctxt));
    }
    return value;
}
 

@SuppressWarnings("unchecked")
private Map<String, Object> readMap(Class<?> type, JsonParser p, DeserializationContext ctxt) throws IOException {
    if (!p.isExpectedStartObjectToken()) {
        throw new JsonParseException(p, "Expected start of object for Map got " + p.currentToken());
    }
    try {
        Map<String, Object> value = (Map<String, Object>) type.getDeclaredConstructor().newInstance();
        JsonToken next = p.nextToken();
        while (next != JsonToken.END_OBJECT) {
            if (next != JsonToken.FIELD_NAME) {
                throw new JsonParseException(p, "Key was not present " + next);
            }
            String key = p.currentName();
            p.nextToken(); // position to next
            Object val = readObject(p, ctxt);
            value.put(key, val);
            next = p.nextToken();
        }
        return value;
    } catch (InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
        throw new JsonMappingException(p, "Can not create empty map for class " + type + " @ " + p.getCurrentLocation(),
                                       e);
    }
}
 

private SdkPojo readPojo(final SdkPojo pojo, JsonParser p, DeserializationContext ctxt) throws IOException {
    if (!p.isExpectedStartObjectToken()) {
        throw new JsonMappingException(p, "Expected to be in START_OBJECT got " + p.currentToken());
    }

    Map<String, SdkField<?>> fieldMap = getFields(pojo);
    JsonToken next = p.nextToken();
    ObjectMapper codec = (ObjectMapper) p.getCodec();
    while (next != JsonToken.END_OBJECT) {
        /*
         * if (next != JsonToken.FIELD_NAME) { throw new JsonMappingException(p,
         * "Expecting to get FIELD_NAME token, got " + next); }
         */
        String fieldName = p.getCurrentName();
        SdkField<?> sdkField = fieldMap.get(fieldName);
        if (sdkField == null) {
            if (codec.isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)) {
                throw new JsonMappingException(p, "Unknown property encountered " + fieldName);
            }
            // we need to skip this
            next = p.nextToken();
            if (next == JsonToken.START_ARRAY || next == JsonToken.START_OBJECT) {
                p.skipChildren();
            }
            // all others, just proceed to next token
            next = p.nextToken();
            continue;
        }
        // progress to next thing to read
        p.nextToken();
        // Okay we need to parse the field and set it
        Object value = readObject(sdkField, p, ctxt);
        sdkField.set(pojo, value);
        next = p.nextToken();
    }
    return pojo instanceof SdkBuilder ? (SdkPojo) ((SdkBuilder) pojo).build() : pojo;
}
 

@Override
public JSONSchemaPropsOrStringArray deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
  JSONSchemaPropsOrStringArrayBuilder builder = new JSONSchemaPropsOrStringArrayBuilder();
  if (jsonParser.isExpectedStartObjectToken()) {
    builder.withSchema(
      jsonParser.readValueAs(JSONSchemaProps.class));
  } else if (jsonParser.isExpectedStartArrayToken()) {
    builder.withProperty(jsonParser.<List<String>>readValueAs(new TypeReference<List<String>>() {}));
  }
  return builder.build();
}
 

@Override
public JSONSchemaPropsOrBool deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
  JSONSchemaPropsOrBoolBuilder builder = new JSONSchemaPropsOrBoolBuilder();
  if (jsonParser.isExpectedStartObjectToken()) {
    builder.withSchema(
      jsonParser.readValueAs(JSONSchemaProps.class));
    builder.withAllows(true);
  } else {
    builder.withAllows(jsonParser.getBooleanValue());
  }
  return builder.build();
}
 

@Override
public JSONSchemaPropsOrArray deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
  JSONSchemaPropsOrArrayBuilder builder = new JSONSchemaPropsOrArrayBuilder();
  if (jsonParser.isExpectedStartObjectToken()) {
    builder.withSchema(
      jsonParser.readValueAs(JSONSchemaProps.class));
  } else if (jsonParser.isExpectedStartArrayToken()) {
    builder.withJSONSchemas(jsonParser.<List<JSONSchemaProps>>readValueAs(new TypeReference<List<JSONSchemaProps>>() {}));
  }
  return builder.build();
}