1 files changed, 56 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/H02FrameDecoder.java b/src/org/traccar/protocol/H02FrameDecoder.java
new file mode 100644
index 000000000..ef28e9986
--- /dev/null
+++ b/src/org/traccar/protocol/H02FrameDecoder.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2013 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.protocol;
+
+import java.nio.charset.Charset;
+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 H02FrameDecoder extends FrameDecoder {
+    
+    private static final int MESSAGE_LENGTH = 32;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx,
+            Channel channel,
+            ChannelBuffer buf) throws Exception {
+        
+        String marker = buf.toString(buf.readerIndex(), 1, Charset.defaultCharset());
+        if (marker.equals("*")) {
+
+            // Return text message
+            Integer index = ChannelBufferTools.find(buf, buf.readerIndex(), buf.readableBytes(), "#");
+            if (index != null) {
+                return buf.readBytes(index + 1 - buf.readerIndex());
+            }
+            
+        } else if (marker.equals("$")) {
+
+            // Return binary message
+            if (buf.readableBytes() >= MESSAGE_LENGTH) {
+                return buf.readBytes(MESSAGE_LENGTH);
+            }
+            
+        }
+
+        return null;
+    }
+
+}