Convert project to gradle

1 files changed, 90 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/L100FrameDecoder.java b/src/main/java/org/traccar/protocol/L100FrameDecoder.java
new file mode 100644
index 000000000..158461895
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/L100FrameDecoder.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2016 - 2018 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 io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+import java.nio.charset.StandardCharsets;
+
+public class L100FrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        if (buf.getCharSequence(buf.readerIndex(), 4, StandardCharsets.US_ASCII).toString().equals("ATL,")) {
+            return decodeNew(buf);
+        } else {
+            return decodeOld(buf);
+        }
+    }
+
+    private Object decodeOld(ByteBuf buf) {
+
+        int header = buf.getByte(buf.readerIndex());
+        boolean obd = header == 'L' || header == 'H';
+
+        int index;
+        if (obd) {
+            index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
+        } else {
+            index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x02);
+            if (index < 0) {
+                index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x04);
+                if (index < 0) {
+                    return null;
+                }
+            }
+        }
+
+        index += 2; // checksum
+
+        if (buf.writerIndex() >= index) {
+            if (!obd) {
+                buf.skipBytes(2); // header
+            }
+            ByteBuf frame = buf.readRetainedSlice(index - buf.readerIndex() - 2);
+            buf.skipBytes(2); // footer
+            return frame;
+        }
+
+        return null;
+    }
+
+    private Object decodeNew(ByteBuf buf) {
+
+        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '@');
+        if (index < 0) {
+            return null;
+        }
+
+        if (buf.writerIndex() >= index + 1) {
+            ByteBuf frame = buf.readRetainedSlice(index - buf.readerIndex());
+            buf.skipBytes(1); // delimiter
+            return frame;
+        }
+
+        return null;
+    }
+
+}