Examples with ConfigSources io.helidon.config.ConfigSources used on opensource projects

Example 1 with ConfigSources

use of io.helidon.config.ConfigSources in project helidon by oracle.

the class MpConfig method toHelidonConfig.

/**
 * This method allows use to use Helidon Config on top of an MP config.
 * There is a limitation - the converters configured with MP config will not be available, unless
 * the implementation is coming from Helidon.
 * <p>
 * If you want to use the Helidon {@link io.helidon.config.Config} API instead of the MicroProfile
 * {@link org.eclipse.microprofile.config.Config} one, this method will create a Helidon config
 * instance that is based on the provided configuration instance.
 *
 * @param mpConfig MP Config instance
 * @return a new Helidon config using only the mpConfig as its config source
 */
public static io.helidon.config.Config toHelidonConfig(Config mpConfig) {
    if (mpConfig instanceof io.helidon.config.Config) {
        return (io.helidon.config.Config) mpConfig;
    }
    // If the mpConfig is based on an SE config (such as when we use meta configuration)pom.xml
    // we must reuse that se config instance
    Iterator<ConfigSource> configSources = mpConfig.getConfigSources().iterator();
    ConfigSource first = configSources.hasNext() ? configSources.next() : null;
    if (!configSources.hasNext() && first instanceof MpHelidonConfigSource) {
        // we only have Helidon SE config as a source - let's just use it
        return ((MpHelidonConfigSource) first).unwrap();
    }
    // we use Helidon SE config to handle object mapping (and possible other mappers on classpath)
    io.helidon.config.Config mapper = io.helidon.config.Config.builder().sources(ConfigSources.empty()).overrides(OverrideSources.empty()).disableEnvironmentVariablesSource().disableSystemPropertiesSource().disableParserServices().disableFilterServices().disableCaching().disableValueResolving().changesExecutor(command -> {
    }).build();
    return new SeConfig(mapper, mpConfig);
}