3 files changed, 62 insertions, 64 deletions

diff --git a/src/org/traccar/helper/ChannelBufferTools.java b/src/org/traccar/helper/ChannelBufferTools.java
new file mode 100644
index 000000000..6df1f7ba2
--- /dev/null
+++ b/src/org/traccar/helper/ChannelBufferTools.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2012 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.helper;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+
+/**
+ * ChannelBuffer helper methods
+ */
+public class ChannelBufferTools {
+    
+    /**
+     * Find string in network buffer
+     */
+    public static Integer find(
+            ChannelBuffer buf,
+            Integer start,
+            Integer length,
+            String subString) {
+
+        int index = start;
+        boolean match;
+
+        for (; index < length; index++) {
+            match = true;
+
+            for (int i = 0; i < subString.length(); i++) {
+                char c = (char) buf.getByte(index + i);
+                if (c != subString.charAt(i)) {
+                    match = false;
+                    break;
+                }
+            }
+
+            if (match) {
+                return index;
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/protocol/EnforaProtocolDecoder.java b/src/org/traccar/protocol/EnforaProtocolDecoder.java
index 2910108a5..3b41592ea 100644
--- a/src/org/traccar/protocol/EnforaProtocolDecoder.java
+++ b/src/org/traccar/protocol/EnforaProtocolDecoder.java
@@ -24,6 +24,7 @@ import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.channel.Channel;
 import org.jboss.netty.channel.ChannelHandlerContext;
 import org.traccar.GenericProtocolDecoder;
+import org.traccar.helper.ChannelBufferTools;
 import org.traccar.helper.Log;
 import org.traccar.model.DataManager;
 import org.traccar.model.Position;
@@ -58,35 +59,6 @@ public class EnforaProtocolDecoder extends GenericProtocolDecoder {
 
     public static final int IMEI_LENGTH = 15;
 
-    // TODO: avoid copy-paste (from XexunFrameDecoder)
-    private static Integer find(
-            ChannelBuffer buf,
-            Integer start,
-            Integer length,
-            String subString) {
-
-        int index = start;
-        boolean match;
-
-        for (; index < length; index++) {
-            match = true;
-
-            for (int i = 0; i < subString.length(); i++) {
-                char c = (char) buf.getByte(index + i);
-                if (c != subString.charAt(i)) {
-                    match = false;
-                    break;
-                }
-            }
-
-            if (match) {
-                return index;
-            }
-        }
-
-        return null;
-    }
-
     /**
      * Decode message
      */
@@ -117,7 +89,7 @@ public class EnforaProtocolDecoder extends GenericProtocolDecoder {
         }
 
         // Find GPSMC string
-        Integer start = find(buf, 0, buf.readableBytes(), "GPRMC");
+        Integer start = ChannelBufferTools.find(buf, 0, buf.readableBytes(), "GPRMC");
         if (start == null) {
             // Message does not contain GPS data
             return null;
diff --git a/src/org/traccar/protocol/XexunFrameDecoder.java b/src/org/traccar/protocol/XexunFrameDecoder.java
index 39bbc66dc..726ca5e1f 100644
--- a/src/org/traccar/protocol/XexunFrameDecoder.java
+++ b/src/org/traccar/protocol/XexunFrameDecoder.java
@@ -19,40 +19,10 @@ import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.channel.Channel;
 import org.jboss.netty.channel.ChannelHandlerContext;
 import org.jboss.netty.handler.codec.frame.FrameDecoder;
+import org.traccar.helper.ChannelBufferTools;
 
 public class XexunFrameDecoder extends FrameDecoder {
 
-    /**
-     * Find string in network buffer
-     */
-    private static Integer find(
-            ChannelBuffer buf,
-            Integer start,
-            Integer length,
-            String subString) {
-
-        int index = start;
-        boolean match;
-
-        for (; index < length; index++) {
-            match = true;
-
-            for (int i = 0; i < subString.length(); i++) {
-                char c = (char) buf.getByte(index + i);
-                if (c != subString.charAt(i)) {
-                    match = false;
-                    break;
-                }
-            }
-
-            if (match) {
-                return index;
-            }
-        }
-
-        return null;
-    }
-
     protected Object decode(
             ChannelHandlerContext ctx,
             Channel channel,
@@ -65,19 +35,19 @@ public class XexunFrameDecoder extends FrameDecoder {
         }
 
         // Find start
-        Integer beginIndex = find(buf, 0, length, "GPRMC");
+        Integer beginIndex = ChannelBufferTools.find(buf, 0, length, "GPRMC");
         if (beginIndex == null) {
             return null;
         }
 
         // Find identifier
-        Integer idIndex = find(buf, beginIndex, length, "imei:");
+        Integer idIndex = ChannelBufferTools.find(buf, beginIndex, length, "imei:");
         if (idIndex == null) {
             return null;
         }
 
         // Find end
-        Integer endIndex = find(buf, idIndex, length, ",");
+        Integer endIndex = ChannelBufferTools.find(buf, idIndex, length, ",");
         if (endIndex == null) {
             return null;
         }