1 files changed, 72 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/helper/model/AttributeUtil.java b/src/main/java/org/traccar/helper/model/AttributeUtil.java
new file mode 100644
index 000000000..5b3fc1cbe
--- /dev/null
+++ b/src/main/java/org/traccar/helper/model/AttributeUtil.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2022 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.helper.model;
+
+import org.traccar.config.ConfigKey;
+import org.traccar.config.KeyType;
+import org.traccar.model.Device;
+import org.traccar.model.Group;
+import org.traccar.session.cache.CacheManager;
+
+public final class AttributeUtil {
+
+    private AttributeUtil() {
+    }
+
+    @SuppressWarnings({ "deprecation", "unchecked" })
+    public static <T> T lookup(CacheManager cacheManager, ConfigKey<T> key, long deviceId) {
+        Device device = cacheManager.getObject(Device.class, deviceId);
+        Object result = device.getAttributes().get(key.getKey());
+        long groupId = device.getGroupId();
+        while (result == null && groupId > 0) {
+            Group group = cacheManager.getObject(Group.class, groupId);
+            if (group != null) {
+                result = group.getAttributes().get(key.getKey());
+            }
+        }
+        if (result == null && key.hasType(KeyType.SERVER)) {
+            result = cacheManager.getServer().getAttributes().get(key.getKey());
+        }
+        if (result == null && key.hasType(KeyType.CONFIG)) {
+            result = cacheManager.getConfig().getString(key.getKey());
+        }
+
+        if (result != null) {
+            Class<T> valueClass = key.getValueClass();
+            if (valueClass.equals(Boolean.class)) {
+                return (T) (result instanceof String
+                        ? Boolean.parseBoolean((String) result)
+                        : result);
+            } else if (valueClass.equals(Integer.class)) {
+                return (T) (Object) (result instanceof String
+                        ? Integer.parseInt((String) result)
+                        : ((Number) result).intValue());
+            } else if (valueClass.equals(Long.class)) {
+                return (T) (Object) (result instanceof String
+                        ? Long.parseLong((String) result)
+                        : ((Number) result).longValue());
+            } else if (valueClass.equals(Double.class)) {
+                return (T) (Object) (result instanceof String
+                        ? Double.parseDouble((String) result)
+                        : ((Number) result).doubleValue());
+            } else {
+                return (T) result;
+            }
+        }
+        return key.getDefaultValue();
+    }
+
+}