aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/processing/ComputedAttributesHandler.java
diff options
context:
space:
mode:
authorAbyss777 <abyss@fox5.ru>2017-05-10 13:27:49 +0500
committerAbyss777 <abyss@fox5.ru>2017-05-12 17:55:01 +0500
commit6c17f85d04b224ff2a09265918765c9f4fc8cf94 (patch)
tree5bbebd7f66b5af547267751fdb4de21283489716 /src/org/traccar/processing/ComputedAttributesHandler.java
parent4ce5dd893d3b95fc759fd1d0e0dbf09d0d559936 (diff)
downloadtrackermap-server-6c17f85d04b224ff2a09265918765c9f4fc8cf94.tar.gz
trackermap-server-6c17f85d04b224ff2a09265918765c9f4fc8cf94.tar.bz2
trackermap-server-6c17f85d04b224ff2a09265918765c9f4fc8cf94.zip
Implement computed attributes
Diffstat (limited to 'src/org/traccar/processing/ComputedAttributesHandler.java')
-rw-r--r--src/org/traccar/processing/ComputedAttributesHandler.java78
1 files changed, 78 insertions, 0 deletions
diff --git a/src/org/traccar/processing/ComputedAttributesHandler.java b/src/org/traccar/processing/ComputedAttributesHandler.java
new file mode 100644
index 000000000..ea7c0aa1d
--- /dev/null
+++ b/src/org/traccar/processing/ComputedAttributesHandler.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 Andrey Kunitsyn (andrey@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.processing;
+
+import java.util.Collection;
+
+import org.apache.commons.jexl2.JexlEngine;
+import org.apache.commons.jexl2.JexlException;
+import org.apache.commons.jexl2.MapContext;
+import org.traccar.BaseDataHandler;
+import org.traccar.Context;
+import org.traccar.helper.Log;
+import org.traccar.model.Attribute;
+import org.traccar.model.Position;
+
+public class ComputedAttributesHandler extends BaseDataHandler {
+
+ private JexlEngine engine;
+
+ public ComputedAttributesHandler() {
+ engine = new JexlEngine();
+ engine.setStrict(true);
+ }
+
+ public Object computeAttribute(Attribute attribute, Position position) throws JexlException {
+ MapContext expressionContext = new MapContext();
+ expressionContext.set("position", position);
+ return engine.createExpression(attribute.getExpression()).evaluate(expressionContext);
+ }
+
+ @Override
+ protected Position handlePosition(Position position) {
+ Collection<Attribute> attributes = Context.getAttributesManager().getAttributes(
+ Context.getAttributesManager().getAllDeviceAttributes(position.getDeviceId()));
+ for (Attribute attribute : attributes) {
+ if (attribute.getAttribute() != null) {
+ Object result = null;
+ try {
+ result = computeAttribute(attribute, position);
+ } catch (JexlException error) {
+ Log.warning(error);
+ }
+ if (result != null) {
+ try {
+ switch (attribute.getType()) {
+ case "number":
+ position.getAttributes().put(attribute.getAttribute(), (Number) result);
+ break;
+ case "boolean":
+ position.getAttributes().put(attribute.getAttribute(), (Boolean) result);
+ break;
+ default:
+ position.getAttributes().put(attribute.getAttribute(), result.toString());
+ }
+ } catch (ClassCastException error) {
+ Log.warning(error);
+ }
+ }
+ }
+ }
+ return position;
+ }
+
+}