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authorAnton Tananaev <anton.tananaev@gmail.com>2018-01-04 07:00:59 +1300
committerAnton Tananaev <anton.tananaev@gmail.com>2018-01-04 07:00:59 +1300
commite00aa4273108c75d4bce19503800ec53cad39af3 (patch)
tree80483b583e1cf915391a21724bc2fd9a6a898ec2 /src/org/traccar/protocol/SpotProtocolDecoder.java
parent01eae916a1b2f39664dbeea2fcf7fb45158f8212 (diff)
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Implement Globalstar SPOT protocol
Diffstat (limited to 'src/org/traccar/protocol/SpotProtocolDecoder.java')
-rw-r--r--src/org/traccar/protocol/SpotProtocolDecoder.java93
1 files changed, 93 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/SpotProtocolDecoder.java b/src/org/traccar/protocol/SpotProtocolDecoder.java
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+/*
+ * 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 com.fasterxml.jackson.databind.util.ByteBufferBackedInputStream;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.handler.codec.http.HttpRequest;
+import org.jboss.netty.handler.codec.http.HttpResponseStatus;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.helper.DateUtil;
+import org.traccar.model.Position;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathConstants;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFactory;
+import java.net.SocketAddress;
+import java.util.LinkedList;
+import java.util.List;
+
+public class SpotProtocolDecoder extends BaseHttpProtocolDecoder {
+
+ private DocumentBuilder documentBuilder;
+ private XPath xPath;
+ private XPathExpression messageExpression;
+
+ public SpotProtocolDecoder(SpotProtocol protocol) {
+ super(protocol);
+ try {
+ documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
+ xPath = XPathFactory.newInstance().newXPath();
+ messageExpression = xPath.compile("//messageList/message");
+ } catch (ParserConfigurationException | XPathExpressionException e) {
+ throw new RuntimeException(e);
+ }
+ }
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ HttpRequest request = (HttpRequest) msg;
+
+ Document document = documentBuilder.parse(new ByteBufferBackedInputStream(request.getContent().toByteBuffer()));
+ NodeList nodes = (NodeList) messageExpression.evaluate(document, XPathConstants.NODESET);
+
+ List<Position> positions = new LinkedList<>();
+
+ for (int i = 0; i < nodes.getLength(); i++) {
+ Node node = nodes.item(i);
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, xPath.evaluate("esnName", node));
+ if (deviceSession != null) {
+
+ Position position = new Position();
+ position.setProtocol(getProtocolName());
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ position.setValid(true);
+ position.setTime(DateUtil.parseDate(xPath.evaluate("timestamp", node)));
+ position.setLatitude(Double.parseDouble(xPath.evaluate("latitude", node)));
+ position.setLongitude(Double.parseDouble(xPath.evaluate("longitude", node)));
+
+ positions.add(position);
+
+ }
+ }
+
+ sendResponse(channel, HttpResponseStatus.OK);
+ return positions;
+ }
+
+}