return -1;
}
RetrievalEnvironment env = new RetrievalEnvironment(indexRootPath, fs);
Path mappingFile = env.getDocnoMappingData();
new TrecWebDocnoMappingBuilder().build(new Path(collection), mappingFile, conf);
conf.set(Constants.CollectionName, "Wt10g");
conf.set(Constants.CollectionPath, collection);
conf.set(Constants.IndexPath, indexRootPath);
conf.set(Constants.InputFormat, SequenceFileInputFormat.class.getCanonicalName());