Examples with Encoding io.swagger.v3.oas.models.media.Encoding used on opensource projects

Example 11 with Encoding

use of io.swagger.v3.oas.models.media.Encoding in project swagger-core by swagger-api.

the class SwaggerMojo method readStructuredDataFromFile.

/**
 * Read the content of given file as either json or yaml and maps it to given class
 *
 * @param filePath    to read content from
 * @param outputClass to map to
 * @param configName  for logging, what user config will be read
 * @param <T>         mapped type
 * @return empty optional if not path was given or the file was empty, read instance otherwis
 * @throws MojoFailureException if given path is not file, could not be read or is not proper json or yaml
 */
private <T> Optional<T> readStructuredDataFromFile(String filePath, Class<T> outputClass, String configName) throws MojoFailureException {
    try {
        // ignore if config is not provided
        if (StringUtils.isBlank(filePath)) {
            return Optional.empty();
        }
        Path pathObj = Paths.get(filePath);
        // if file does not exist or is not an actual file, finish with error
        if (!pathObj.toFile().exists() || !pathObj.toFile().isFile()) {
            throw new IllegalArgumentException(format("passed path does not exist or is not a file: '%s'", filePath));
        }
        String fileContent = new String(Files.readAllBytes(pathObj), encoding);
        // if provided file is empty, log warning and finish
        if (StringUtils.isBlank(fileContent)) {
            getLog().warn(format("It seems that file '%s' defined in config %s is empty", pathObj.toString(), configName));
            return Optional.empty();
        }
        // get mappers in the order based on file extension
        List<BiFunction<String, Class<T>, T>> mappers = getSortedMappers(pathObj);
        T instance = null;
        Throwable caughtEx = null;
        // iterate through mappers and see if one is able to parse
        for (BiFunction<String, Class<T>, T> mapper : mappers) {
            try {
                instance = mapper.apply(fileContent, outputClass);
                break;
            } catch (Exception e) {
                caughtEx = e;
            }
        }
        // if no mapper could read the content correctly, finish with error
        if (instance == null) {
            if (caughtEx == null) {
                caughtEx = new IllegalStateException("undefined state");
            }
            getLog().error(format("Could not read file '%s' for config %s", pathObj.toString(), configName), caughtEx);
            throw new IllegalStateException(caughtEx.getMessage(), caughtEx);
        }
        return Optional.of(instance);
    } catch (Exception e) {
        getLog().error(format("Error reading/deserializing config %s file", configName), e);
        throw new MojoFailureException(e.getMessage(), e);
    }
}