From 4054777eac379ce07560c44901ada659aad062ba Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Tue, 19 Jul 2016 11:36:21 +1200
Subject: Get device id from position

---
 src/org/traccar/BaseProtocolDecoder.java | 38 +++++++++++++++++---------------
 1 file changed, 20 insertions(+), 18 deletions(-)

diff --git a/src/org/traccar/BaseProtocolDecoder.java b/src/org/traccar/BaseProtocolDecoder.java
index 9a253e351..59205bc6f 100644
--- a/src/org/traccar/BaseProtocolDecoder.java
+++ b/src/org/traccar/BaseProtocolDecoder.java
@@ -78,25 +78,27 @@ public abstract class BaseProtocolDecoder extends ExtendedObjectDecoder {
     }
 
     public void getLastLocation(Position position, Date deviceTime) {
-        position.setOutdated(true);
-
-        Position last = Context.getIdentityManager().getLastPosition(getDeviceId());
-        if (last != null) {
-            position.setFixTime(last.getFixTime());
-            position.setValid(last.getValid());
-            position.setLatitude(last.getLatitude());
-            position.setLongitude(last.getLongitude());
-            position.setAltitude(last.getAltitude());
-            position.setSpeed(last.getSpeed());
-            position.setCourse(last.getCourse());
-        } else {
-            position.setFixTime(new Date(0));
-        }
+        if (position.getDeviceId() != 0) {
+            position.setOutdated(true);
+
+            Position last = Context.getIdentityManager().getLastPosition(position.getDeviceId());
+            if (last != null) {
+                position.setFixTime(last.getFixTime());
+                position.setValid(last.getValid());
+                position.setLatitude(last.getLatitude());
+                position.setLongitude(last.getLongitude());
+                position.setAltitude(last.getAltitude());
+                position.setSpeed(last.getSpeed());
+                position.setCourse(last.getCourse());
+            } else {
+                position.setFixTime(new Date(0));
+            }
 
-        if (deviceTime != null) {
-            position.setDeviceTime(deviceTime);
-        } else {
-            position.setDeviceTime(new Date());
+            if (deviceTime != null) {
+                position.setDeviceTime(deviceTime);
+            } else {
+                position.setDeviceTime(new Date());
+            }
         }
     }
 
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