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authorValerii Vyshniak <valeravi@vi-soft.com.ua>2017-11-22 02:05:59 +0100
committerValerii Vyshniak <valeravi@vi-soft.com.ua>2017-11-22 02:05:59 +0100
commite5a8be1987aecf3735801165ee19c1bcdd4fcc05 (patch)
tree2704face5d94dd5aab2d4d224578ce33fab05dc9 /src/org/traccar/protocol/Tk103FrameDecoder.java
parent8d8bab8a2df30629fb612b0573b2bd5f46c4b05e (diff)
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T580W: review comments fixes 3, re-implemented tk103 frame decoder
Diffstat (limited to 'src/org/traccar/protocol/Tk103FrameDecoder.java')
-rw-r--r--src/org/traccar/protocol/Tk103FrameDecoder.java66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/Tk103FrameDecoder.java b/src/org/traccar/protocol/Tk103FrameDecoder.java
new file mode 100644
index 000000000..17e791553
--- /dev/null
+++ b/src/org/traccar/protocol/Tk103FrameDecoder.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2017 Valerii Vyshniak (val@val.one)
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * 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 org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+
+import java.nio.ByteOrder;
+
+public class Tk103FrameDecoder extends FrameDecoder {
+
+ @Override
+ protected Object decode(
+ ChannelHandlerContext ctx,
+ Channel channel,
+ ChannelBuffer buf) throws Exception {
+
+ if (buf.readableBytes() < 2) {
+ return null;
+ }
+
+ int index;
+ for (index = buf.readerIndex(); true; index++) {
+ index = buf.indexOf(index, buf.writerIndex(), (byte) ')');
+ if (index == -1) {
+ break;
+ }
+ int cnt = 0;
+ for (int i = buf.readerIndex(); i < index; i++) {
+ if (buf.getByte(i) == (byte) '$') {
+ cnt++;
+ }
+ }
+ if (cnt % 2 == 0) {
+ break;
+ }
+ }
+
+ if (index != -1) {
+ ChannelBuffer result = ChannelBuffers.buffer(ByteOrder.LITTLE_ENDIAN, index + 1 - buf.readerIndex());
+ buf.readBytes(result, index + 1 - buf.readerIndex());
+ result.writerIndex(result.writerIndex() - 1);
+ return result;
+ }
+
+ return null;
+ }
+
+}