From 9a7e9e1b5822351c2c7aec8d6f1fde5b637afaaf Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Thu, 29 Oct 2015 15:20:22 +1300
Subject: Refactor Sanav protocol decoder

---
 src/org/traccar/protocol/SanavProtocolDecoder.java | 92 ++++++++--------------
 1 file changed, 32 insertions(+), 60 deletions(-)

(limited to 'src/org/traccar/protocol/SanavProtocolDecoder.java')

diff --git a/src/org/traccar/protocol/SanavProtocolDecoder.java b/src/org/traccar/protocol/SanavProtocolDecoder.java
index 77af9b214..1411651d5 100644
--- a/src/org/traccar/protocol/SanavProtocolDecoder.java
+++ b/src/org/traccar/protocol/SanavProtocolDecoder.java
@@ -16,12 +16,12 @@
 package org.traccar.protocol;
 
 import java.net.SocketAddress;
-import java.util.Calendar;
-import java.util.TimeZone;
-import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
 import org.traccar.model.Position;
 
 public class SanavProtocolDecoder extends BaseProtocolDecoder {
@@ -30,81 +30,53 @@ public class SanavProtocolDecoder extends BaseProtocolDecoder {
         super(protocol);
     }
 
-    private static final Pattern PATTERN = Pattern.compile(
-            ".*imei[:=]" +
-            "(\\d+)" +                          // IMEI
-            "&?rmc[:=]\\$GPRMC," +
-            "(\\d{2})(\\d{2})(\\d{2}).(\\d+)," + // Time (HHMMSS.SSS)
-            "([AV])," +                         // Validity
-            "(\\d+)(\\d{2}\\.\\d+)," +          // Latitude (DDMM.MMMM)
-            "([NS])," +
-            "(\\d+)(\\d{2}\\.\\d+)," +          // Longitude (DDDMM.MMMM)
-            "([EW])," +
-            "(\\d+\\.\\d+)," +                  // Speed
-            "(\\d+\\.\\d+)?," +                 // Course
-            "(\\d{2})(\\d{2})(\\d{2})," +       // Date (DDMMYY)
-            ".*");
+    private static final Pattern PATTERN = new PatternBuilder()
+            .any()
+            .expression("imei[:=]")
+            .number("(d+)")                      // imei
+            .expression("&?rmc[:=]")
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).(d+),")        // time
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.d+),")                  // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .any()
+            .compile();
 
     @Override
     protected Object decode(
-            Channel channel, SocketAddress remoteAddress, Object msg)
-            throws Exception {
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
 
-        // Parse message
-        String sentence = (String) msg;
-        Matcher parser = PATTERN.matcher(sentence);
+        Parser parser = new Parser(PATTERN, (String) msg);
         if (!parser.matches()) {
             return null;
         }
 
-        // Create new position
         Position position = new Position();
         position.setProtocol(getProtocolName());
-        Integer index = 1;
 
-        // Identification
-        if (!identify(parser.group(index++), channel)) {
+        if (!identify(parser.next(), channel)) {
             return null;
         }
         position.setDeviceId(getDeviceId());
 
-        // Time
-        Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
-        time.clear();
-        time.set(Calendar.HOUR_OF_DAY, Integer.parseInt(parser.group(index++)));
-        time.set(Calendar.MINUTE, Integer.parseInt(parser.group(index++)));
-        time.set(Calendar.SECOND, Integer.parseInt(parser.group(index++)));
-        time.set(Calendar.MILLISECOND, Integer.parseInt(parser.group(index++)));
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt());
 
-        // Validity
-        position.setValid(parser.group(index++).compareTo("A") == 0);
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble());
+        position.setCourse(parser.nextDouble());
 
-        // Latitude
-        Double latitude = Double.parseDouble(parser.group(index++));
-        latitude += Double.parseDouble(parser.group(index++)) / 60;
-        if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
-        position.setLatitude(latitude);
+        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        position.setTime(dateBuilder.getDate());
 
-        // Longitude
-        Double longitude = Double.parseDouble(parser.group(index++));
-        longitude += Double.parseDouble(parser.group(index++)) / 60;
-        if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
-        position.setLongitude(longitude);
-
-        // Speed
-        position.setSpeed(Double.parseDouble(parser.group(index++)));
-
-        // Course
-        String course = parser.group(index++);
-        if (course != null) {
-            position.setCourse(Double.parseDouble(course));
-        }
-
-        // Date
-        time.set(Calendar.DAY_OF_MONTH, Integer.parseInt(parser.group(index++)));
-        time.set(Calendar.MONTH, Integer.parseInt(parser.group(index++)) - 1);
-        time.set(Calendar.YEAR, 2000 + Integer.parseInt(parser.group(index++)));
-        position.setTime(time.getTime());
         return position;
     }
 
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