Add option to output raw bitstream from CommandLineRunner. (#1442)

* Add option to output raw bitstream from CommandLineRunner.
Useful for debugging barcodes. Same as the web decoder.

* Use StringBuilder. Fix indentation.

javase/src/main/java/com/google/zxing/client/j2se/DecodeWorker.java

@@ -165,6 +165,19 @@ final class DecodeWorker implements Callable<Integer> {
             result.getText() + "\n" +
             "Parsed result:\n" +
             parsedResult.getDisplayResult() + "\n");
+
+        if (config.outputRaw) {
+          StringBuilder rawData = new StringBuilder();
+
+          for (byte b : result.getRawBytes()) {
+            rawData.append(String.format("%02X", b & 0xff));
+            rawData.append(" ");
+          }
+          rawData.setLength(rawData.length() - 1);  // chop off final space
+
+          output.write("Raw bits:\n" + rawData.toString() + "\n");
+        }
+
         ResultPoint[] resultPoints = result.getResultPoints();
         int numResultPoints = resultPoints.length;
         output.write("Found " + numResultPoints + " result points.\n");

javase/src/main/java/com/google/zxing/client/j2se/DecoderConfig.java

@@ -58,6 +58,10 @@ final class DecoderConfig {
       description = "Only output one line per file, omitting the contents")
   boolean brief;
 
+  @Parameter(names = "--raw",
+      description = "Output raw bitstream, before decoding symbols")
+  boolean outputRaw;
+
   @Parameter(names = "--recursive",
       description = "Descend into subdirectories")
   boolean recursive;