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-rw-r--r--src/org/traccar/protocol/H02FrameDecoder.java56
1 files changed, 56 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/H02FrameDecoder.java b/src/org/traccar/protocol/H02FrameDecoder.java
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+++ b/src/org/traccar/protocol/H02FrameDecoder.java
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+/*
+ * 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;
+ }
+
+}