Source:
private static void makeIndexBinary( final FileSmoosher v9Smoosher, final List<IndexableAdapter> adapters, final File outDir, final List<String> mergedDimensions, final List<String> mergedMetrics, final Set<String> skippedDimensions, final ProgressIndicator progress ) throws IOException { final String section = "building index.drd"; progress.startSection(section); final Set<String> finalColumns = Sets.newTreeSet(); finalColumns.addAll(mergedDimensions); finalColumns.addAll(mergedMetrics); finalColumns.removeAll(skippedDimensions); final Iterable<String> finalDimensions = Iterables.filter( mergedDimensions, new Predicate<String>() { @Override public boolean apply(String input) { return !skippedDimensions.contains(input); } } ); GenericIndexed<String> cols = GenericIndexed.fromIterable(finalColumns, GenericIndexed.stringStrategy); GenericIndexed<String> dims = GenericIndexed.fromIterable(finalDimensions, GenericIndexed.stringStrategy); final String bitmapSerdeFactoryType = mapper.writeValueAsString(bitmapSerdeFactory); final long numBytes = cols.getSerializedSize() + dims.getSerializedSize() + 16 + 4 + bitmapSerdeFactoryType.getBytes().length; final SmooshedWriter writer = v9Smoosher.addWithSmooshedWriter("index.drd", numBytes); cols.writeToChannel(writer); dims.writeToChannel(writer); DateTime minTime = new DateTime(Long.MAX_VALUE); DateTime maxTime = new DateTime(0l); for (IndexableAdapter index : adapters) { minTime = JodaUtils.minDateTime(minTime, index.getDataInterval().getStart()); maxTime = JodaUtils.maxDateTime(maxTime, index.getDataInterval().getEnd()); } final Interval dataInterval = new Interval(minTime, maxTime); serializerUtils.writeLong(writer, dataInterval.getStartMillis()); serializerUtils.writeLong(writer, dataInterval.getEndMillis()); serializerUtils.writeString( writer, bitmapSerdeFactoryType ); writer.close(); IndexIO.checkFileSize(new File(outDir, "index.drd")); progress.stopSection(section); }

Target:
private static void makeIndexBinary( final FileSmoosher v9Smoosher, final List<IndexableAdapter> adapters, final File outDir, final List<String> mergedDimensions, final List<String> mergedMetrics, final Set<String> skippedDimensions, final ProgressIndicator progress ) throws IOException { final String section = "building index.drd"; progress.startSection(section); final Set<String> finalColumns = Sets.newTreeSet(); finalColumns.addAll(mergedDimensions); finalColumns.addAll(mergedMetrics); finalColumns.removeAll(skippedDimensions); final Iterable<String> finalDimensions = Iterables.filter( mergedDimensions, new Predicate<String>() { @Override public boolean apply(String input) { return !skippedDimensions.contains(input); } } ); GenericIndexed<String> cols = GenericIndexed.fromIterable(finalColumns, GenericIndexed.stringStrategy); GenericIndexed<String> dims = GenericIndexed.fromIterable(finalDimensions, GenericIndexed.stringStrategy); final String bitmapSerdeFactoryType = mapper.writeValueAsString(bitmapSerdeFactory); final long numBytes = cols.getSerializedSize() + dims.getSerializedSize() + 16 + serializerUtils.getSerializedStringByteSize(bitmapSerdeFactoryType); final SmooshedWriter writer = v9Smoosher.addWithSmooshedWriter("index.drd", numBytes); cols.writeToChannel(writer); dims.writeToChannel(writer); DateTime minTime = new DateTime(Long.MAX_VALUE); DateTime maxTime = new DateTime(0l); for (IndexableAdapter index : adapters) { minTime = JodaUtils.minDateTime(minTime, index.getDataInterval().getStart()); maxTime = JodaUtils.maxDateTime(maxTime, index.getDataInterval().getEnd()); } final Interval dataInterval = new Interval(minTime, maxTime); serializerUtils.writeLong(writer, dataInterval.getStartMillis()); serializerUtils.writeLong(writer, dataInterval.getEndMillis()); serializerUtils.writeString( writer, bitmapSerdeFactoryType ); writer.close(); IndexIO.checkFileSize(new File(outDir, "index.drd")); progress.stopSection(section); }