From 660828e48ac0657e9673c1d7647131ffa9d9c963 Mon Sep 17 00:00:00 2001
From: Abyss777 <abyss@fox5.ru>
Date: Thu, 18 May 2017 13:57:29 +0500
Subject: Unwrap position fields and attributes to computedAttribute context.

---
 .../processing/ComputedAttributesHandler.java      | 31 ++++++++++++++++--
 .../traccar/processing/ComputedAttributesTest.java | 37 +++++++++++++++++++---
 2 files changed, 60 insertions(+), 8 deletions(-)

diff --git a/src/org/traccar/processing/ComputedAttributesHandler.java b/src/org/traccar/processing/ComputedAttributesHandler.java
index ea7c0aa1d..b158431ef 100644
--- a/src/org/traccar/processing/ComputedAttributesHandler.java
+++ b/src/org/traccar/processing/ComputedAttributesHandler.java
@@ -16,7 +16,10 @@
  */
 package org.traccar.processing;
 
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.util.Collection;
+import java.util.Map;
 
 import org.apache.commons.jexl2.JexlEngine;
 import org.apache.commons.jexl2.JexlException;
@@ -36,10 +39,32 @@ public class ComputedAttributesHandler extends BaseDataHandler {
         engine.setStrict(true);
     }
 
+    private MapContext prepareContext(Position position) {
+        MapContext result = new MapContext();
+        Method[] methods = position.getClass().getMethods();
+        for (Method method : methods) {
+            if (method.getName().startsWith("get") && method.getParameterTypes().length == 0
+                    && !method.getName().equals("getClass")) {
+                String name = method.getName().substring(3, 4).toLowerCase() + method.getName().substring(4);
+
+                try {
+                    if (!method.getReturnType().equals(Map.class)) {
+                        result.set(name, method.invoke(position));
+                    } else {
+                        for (Object key : ((Map) method.invoke(position)).keySet()) {
+                            result.set((String) key, ((Map) method.invoke(position)).get(key));
+                        }
+                    }
+                } catch (IllegalAccessException | InvocationTargetException error) {
+                    Log.warning(error);
+                }
+            }
+        }
+        return result;
+    }
+
     public Object computeAttribute(Attribute attribute, Position position) throws JexlException {
-        MapContext expressionContext = new MapContext();
-        expressionContext.set("position", position);
-        return engine.createExpression(attribute.getExpression()).evaluate(expressionContext);
+        return engine.createExpression(attribute.getExpression()).evaluate(prepareContext(position));
     }
 
     @Override
diff --git a/test/org/traccar/processing/ComputedAttributesTest.java b/test/org/traccar/processing/ComputedAttributesTest.java
index 432f1b9ad..ac4331c6d 100644
--- a/test/org/traccar/processing/ComputedAttributesTest.java
+++ b/test/org/traccar/processing/ComputedAttributesTest.java
@@ -1,5 +1,7 @@
 package org.traccar.processing;
 
+import java.util.Date;
+
 import org.junit.Assert;
 import org.junit.Test;
 import org.traccar.model.Attribute;
@@ -11,27 +13,52 @@ public class ComputedAttributesTest {
     public void testComputedAttributes() {
         Position position = new Position();
         ComputedAttributesHandler computedAttributesHandler = new ComputedAttributesHandler();
+        Date date = new Date();
+        position.setTime(date);
+        position.setSpeed(42);
+        position.setValid(false);
         position.set("adc1", 128);
         position.set("booleanFlag", true);
         position.set("adc2", 100);
         position.set("bitFlag", 7);
         position.set("event", 42);
+        position.set("result", "success");
         Attribute attribute = new Attribute();
 
-        attribute.setExpression("position.getInteger(\"adc1\")");
+        attribute.setExpression("adc1");
         Assert.assertEquals(128, computedAttributesHandler.computeAttribute(attribute, position));
 
-        attribute.setExpression("!position.getBoolean(\"booleanFlag\")");
+        attribute.setExpression("!booleanFlag");
         Assert.assertEquals(false, computedAttributesHandler.computeAttribute(attribute, position));
 
-        attribute.setExpression("position.getInteger(\"adc2\") * 2 + 50");
+        attribute.setExpression("adc2 * 2 + 50");
         Assert.assertEquals(250, computedAttributesHandler.computeAttribute(attribute, position));
 
-        attribute.setExpression("(position.getLong(\"bitFlag\") & 4) != 0");
+        attribute.setExpression("(bitFlag & 4) != 0");
         Assert.assertEquals(true, computedAttributesHandler.computeAttribute(attribute, position));
 
-        attribute.setExpression("if (position.getLong(\"event\") == 42) \"lowBattery\"");
+        attribute.setExpression("if (event == 42) \"lowBattery\"");
         Assert.assertEquals("lowBattery", computedAttributesHandler.computeAttribute(attribute, position));
+        
+        attribute.setExpression("speed > 5 && valid");
+        Assert.assertEquals(false, computedAttributesHandler.computeAttribute(attribute, position));
+        
+        attribute.setExpression("fixTime");
+        Assert.assertEquals(date, computedAttributesHandler.computeAttribute(attribute, position));
+        
+        // modification tests
+        attribute.setExpression("adc1 = 256");
+        computedAttributesHandler.computeAttribute(attribute, position);
+        Assert.assertEquals(128, position.getInteger("adc1"));
+        
+        attribute.setExpression("result = \"fail\"");
+        computedAttributesHandler.computeAttribute(attribute, position);
+        Assert.assertEquals("success", position.getString("result"));
+        
+        attribute.setExpression("fixTime = \"2017-10-18 10:00:01\"");
+        computedAttributesHandler.computeAttribute(attribute, position);
+        Assert.assertEquals(date, position.getFixTime());
+        
     }
 
 }
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