Refactor TAIP protocol decoder

3 files changed, 67 insertions, 76 deletions

diff --git a/src/org/traccar/helper/DateBuilder.java b/src/org/traccar/helper/DateBuilder.java
index 77c6821aa..0ad7a4d7b 100644
--- a/src/org/traccar/helper/DateBuilder.java
+++ b/src/org/traccar/helper/DateBuilder.java
@@ -25,13 +25,20 @@ public class DateBuilder {
 
     public DateBuilder() {
         this(TimeZone.getTimeZone("UTC"));
+    }
 
+    public DateBuilder(Date time) {
+        this(time, TimeZone.getTimeZone("UTC"));
     }
 
     public DateBuilder(TimeZone timeZone) {
+        this(new Date(0), timeZone);
+    }
+
+    public DateBuilder(Date time, TimeZone timeZone) {
         calendar = Calendar.getInstance(timeZone);
         calendar.clear();
-        calendar.setTimeInMillis(0);
+        calendar.setTimeInMillis(time.getTime());
     }
 
     public DateBuilder setYear(int year) {
@@ -90,6 +97,11 @@ public class DateBuilder {
         return this;
     }
 
+    public DateBuilder addMillis(long millis) {
+        calendar.setTimeInMillis(calendar.getTimeInMillis() + millis);
+        return this;
+    }
+
     public DateBuilder setTime(int hour, int minute, int second) {
         return setHour(hour).setMinute(minute).setSecond(second);
     }
diff --git a/src/org/traccar/helper/Parser.java b/src/org/traccar/helper/Parser.java
index 8d6dd1a64..c5f5d2e37 100644
--- a/src/org/traccar/helper/Parser.java
+++ b/src/org/traccar/helper/Parser.java
@@ -87,6 +87,7 @@ public class Parser {
     }
 
     public enum CoordinateFormat {
+        DEG_DEG,
         DEG_HEM,
         DEG_MIN_HEM,
         DEG_MIN_MIN_HEM,
@@ -98,9 +99,12 @@ public class Parser {
 
     public double nextCoordinate(CoordinateFormat format) {
         double coordinate;
-        String hemisphere;
+        String hemisphere = null;
 
         switch (format) {
+            case DEG_DEG:
+                coordinate = Double.parseDouble(next() + '.' + next());
+                break;
             case DEG_HEM:
                 coordinate = nextDouble();
                 hemisphere = next();
diff --git a/src/org/traccar/protocol/TaipProtocolDecoder.java b/src/org/traccar/protocol/TaipProtocolDecoder.java
index 860dd4602..7f8c1a3c6 100644
--- a/src/org/traccar/protocol/TaipProtocolDecoder.java
+++ b/src/org/traccar/protocol/TaipProtocolDecoder.java
@@ -16,13 +16,13 @@
 package org.traccar.protocol;
 
 import java.net.SocketAddress;
-import java.util.Calendar;
 import java.util.Date;
-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.helper.UnitsConverter;
 import org.traccar.model.Position;
 
@@ -35,44 +35,41 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
         this.sendResponse = sendResponse;
     }
 
-    private static final Pattern PATTERN = Pattern.compile(
-            "(?:R[EP]V" +                  // Type
-            "(?:\\d{2}" +                  // Event index
-            "(\\d{4})" +                   // Week
-            "(\\d))?" +                    // Day
-            "(\\d{5})|" +                  // Seconds
-            "RGP" +                        // Type
-            "(\\d{2})(\\d{2})(\\d{2})" +   // Date
-            "(\\d{2})(\\d{2})(\\d{2}))" +  // Time
-            "([\\+\\-]\\d{2})(\\d{5})" +   // Latitude
-            "([\\+\\-]\\d{3})(\\d{5})" +   // Longitude
-            "(\\d{3})" +                   // Speed
-            "(\\d{3})" +                   // Course
-            "(\\d)" +                      // Fix mode
-            ".*\r?\n?");
+    private static final Pattern PATTERN = new PatternBuilder()
+            .groupBegin()
+            .expression("R[EP]V")                // type
+            .groupBegin()
+            .number("dd")                        // event index
+            .number("(dddd)")                    // week
+            .number("(d)")                       // day
+            .groupEnd("?")
+            .number("(d{5})")                    // seconds
+            .or()
+            .text("RGP")                         // type
+            .number("(dd)(dd)(dd)")              // date
+            .number("(dd)(dd)(dd)")              // time
+            .groupEnd()
+            .number("([-+]dd)(d{5})")            // latitude
+            .number("([-+]ddd)(d{5})")           // longitude
+            .number("(ddd)")                     // speed
+            .number("(ddd)")                     // course
+            .number("(d)")                       // fix mode
+            .any()
+            .compile();
 
     private Date getTime(long week, long day, long seconds) {
-        Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
-        time.clear();
-        time.set(Calendar.YEAR, 1980);
-        time.set(Calendar.MONTH, 0);
-        time.set(Calendar.DAY_OF_MONTH, 6);
-
-        long millis = time.getTimeInMillis();
-        millis += ((week * 7 + day) * 24 * 60 * 60 + seconds) * 1000;
-
-        return new Date(millis);
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(1980, 1, 6)
+                .addMillis(((week * 7 + day) * 24 * 60 * 60 + seconds) * 1000);
+        return dateBuilder.getDate();
     }
 
     private Date getTime(long seconds) {
-        Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
-        time.set(Calendar.HOUR_OF_DAY, 0);
-        time.set(Calendar.MINUTE, 0);
-        time.set(Calendar.SECOND, 0);
-        time.set(Calendar.MILLISECOND, 0);
-
-        long millis = time.getTimeInMillis() + seconds * 1000;
+        DateBuilder dateBuilder = new DateBuilder(new Date())
+                .setTime(0, 0, 0, 0)
+                .addMillis(seconds * 1000);
 
+        long millis = dateBuilder.getDate().getTime();
         long diff = System.currentTimeMillis() - millis;
 
         if (diff > 12 * 60 * 60 * 1000) {
@@ -86,8 +83,7 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
 
     @Override
     protected Object decode(
-            Channel channel, SocketAddress remoteAddress, Object msg)
-            throws Exception {
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
 
         String sentence = (String) msg;
 
@@ -97,7 +93,7 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             sentence = sentence.substring(beginIndex + 1);
         }
 
-        // Find device ID
+        // Find device identifier
         beginIndex = sentence.indexOf(";ID=");
         if (beginIndex != -1) {
             beginIndex += 4;
@@ -106,13 +102,11 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
                 endIndex = sentence.length();
             }
 
-            // Find device in database
             String id = sentence.substring(beginIndex, endIndex);
             if (!identify(id, channel)) {
                 return null;
             }
 
-            // Send response
             if (sendResponse && channel != null) {
                 channel.write(id);
             }
@@ -120,58 +114,39 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        // Parse message
-        Matcher parser = PATTERN.matcher(sentence);
+        Parser parser = new Parser(PATTERN, sentence);
         if (!parser.matches()) {
             return null;
         }
 
-        // Create new position
         Position position = new Position();
         position.setProtocol(getProtocolName());
         position.setDeviceId(getDeviceId());
 
-        Integer index = 1;
-
-        // Time
-        String week = parser.group(index++);
-        String day = parser.group(index++);
-        String seconds = parser.group(index++);
+        String week = parser.next();
+        String day = parser.next();
+        String seconds = parser.next();
         if (seconds != null) {
             if (week != null && day != null) {
                 position.setTime(getTime(Integer.parseInt(week), Integer.parseInt(day), Integer.parseInt(seconds)));
             } else {
                 position.setTime(getTime(Integer.parseInt(seconds)));
             }
-            index += 6;
-        } else {
-            Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
-            time.clear();
-            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++)));
-            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++)));
-            position.setTime(time.getTime());
         }
 
-        // Latitude
-        String latitude = parser.group(index) + '.' + parser.group(index + 1);
-        index += 2;
-        position.setLatitude(Double.parseDouble(latitude));
-
-        // Latitude
-        String longitude = parser.group(index) + '.' + parser.group(index + 1);
-        index += 2;
-        position.setLongitude(Double.parseDouble(longitude));
+        if (parser.hasNext(6)) {
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt())
+                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            position.setTime(dateBuilder.getDate());
+        }
 
-        // Speed and Course
-        position.setSpeed(UnitsConverter.knotsFromMph(Double.parseDouble(parser.group(index++))));
-        position.setCourse(Double.parseDouble(parser.group(index++)));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_DEG));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_DEG));
+        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble()));
+        position.setCourse(parser.nextDouble());
+        position.setValid(parser.nextInt() != 0);
 
-        // Validity
-        position.setValid(Integer.parseInt(parser.group(index++)) != 0);
         return position;
     }