1 files changed, 105 insertions, 0 deletions
diff --git a/src/net/sourceforge/opentracking/protocol/xexun/XexunFrameDecoder.java b/src/net/sourceforge/opentracking/protocol/xexun/XexunFrameDecoder.java
new file mode 100644
index 000000000..338c7bec9
--- /dev/null
+++ b/src/net/sourceforge/opentracking/protocol/xexun/XexunFrameDecoder.java
@@ -0,0 +1,105 @@
+/*
+ * Минимум - 100
+ * Начало - (10 цифр) + ','
+ * Длина 16 x ','
+ */
+
+package net.sourceforge.opentracking.protocol.xexun;
+
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.buffer.ChannelBuffer;
+
+/**
+ * 
+ */
+public class XexunFrameDecoder extends FrameDecoder {
+
+    protected Object decode(
+            ChannelHandlerContext ctx,
+            Channel channel,
+            ChannelBuffer buf) throws Exception {
+
+        System.out.println("read: " + buf.readableBytes());
+
+        // Check minimum length
+        int length = buf.readableBytes();
+        if (length < 100) {
+            return null;
+        }
+
+        // Find identifier
+        int index = 0;
+        int countDigit = 0;
+        for (; index < length; index++) {
+
+            // Check byte
+            char c = (char) buf.getByte(index);
+            if (Character.isDigit(c)) {
+                countDigit++;
+            }
+
+            // Check count
+            if (countDigit == 10) {
+                break;
+            }
+        }
+
+        if (countDigit < 10) {
+            return null;
+        }
+
+        // Find begin
+        int beginIndex = 0;
+        for (; index < length; index++) {
+
+            char c = (char) buf.getByte(index);
+            if (c == ',') {
+                beginIndex = index;
+                break;
+            }
+        }
+
+        if (beginIndex == 0) {
+            return null;
+        }
+
+        // Find imei
+        int imeiIndex = 0;
+        for (; index < length; index++) {
+
+            char c = (char) buf.getByte(index);
+            if (c == ':') {
+                imeiIndex = index;
+                break;
+            }
+        }
+
+        if (imeiIndex == 0) {
+            return null;
+        }
+
+        // Find end
+        int endIndex = 0;
+        for (; index < length; index++) {
+
+            char c = (char) buf.getByte(index);
+            if (c == ',') {
+                endIndex = index;
+                break;
+            }
+        }
+
+        if (endIndex == 0) {
+            return null;
+        }
+
+        // Read buffer
+        buf.skipBytes(beginIndex);
+        ChannelBuffer frame = buf.readBytes(endIndex - beginIndex + 1);
+
+        return frame;
+    }
+
+}