MetadataConfiguration.java 文件源码

/**
 * Read any metadata stored in the {@link Configuration}.
 *
 * @param conf
 *            the configuration
 * @return the metadata map
 */
public static Metadata getMetadata(Configuration conf) {
    final Metadata metadata = new Metadata();

    final String[] keys = conf.getStrings(META_KEYS);

    if (keys != null) {
        for (final String key : keys) {
            final String value = conf.get(META_PREFIX + key);

            if (value != null)
                metadata.set(new Text(key), new Text(value));
        }
    }

    return metadata;
}