SequenceFileUtility.java 文件源码

/**
 * Return the metadata map. Read mode only.
 *
 * @return metadata
 */
public Map<Text, Text> getMetadata() {
    if (!isReader) {
        throw new UnsupportedOperationException("Cannot read metadata in write mode");
    }

    Reader reader = null;
    try {
        reader = createReader();
        final Map<Text, Text> metadata = reader.getMetadata().getMetadata();
        return metadata;
    } catch (final Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (reader != null)
            try {
                reader.close();
            } catch (final IOException e1) {
            }
    }
}