RDFInputFormat.java 文件源码

protected LinkedMapWritable getRoleMap(TaskAttemptContext context) throws IOException{
    //Restores the object from the configuration.
    Configuration conf = context.getConfiguration();
    LinkedMapWritable fhmap = null;
    if(conf.get(ConfigConstants.CONF_ROLE_MAP)!=null) {
        fhmap = DefaultStringifier.load(conf, ConfigConstants.CONF_ROLE_MAP, 
            LinkedMapWritable.class);
    }
    return fhmap;
}