1 files changed, 119 insertions, 0 deletions
diff --git a/src/org/traccar/database/AliasesManager.java b/src/org/traccar/database/AliasesManager.java
new file mode 100644
index 000000000..0a9854385
--- /dev/null
+++ b/src/org/traccar/database/AliasesManager.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2016 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2016 Andrey Kunitsyn (abyss@fox5.ru)
+ *
+ * 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.database;
+
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.traccar.Context;
+import org.traccar.helper.Log;
+import org.traccar.model.AttributeAlias;
+
+public class AliasesManager {
+
+    private final DataManager dataManager;
+
+    private final Map<Long, Set<AttributeAlias>> deviceAliases = new ConcurrentHashMap<>();
+    private final Map<Long, AttributeAlias> aliasesById = new ConcurrentHashMap<>();
+
+
+    public AliasesManager(DataManager dataManager) {
+        this.dataManager = dataManager;
+        refresh();
+    }
+
+    public Set<AttributeAlias> getDeviceAttributeAliases(long deviceId) {
+        if (!deviceAliases.containsKey(deviceId)) {
+            deviceAliases.put(deviceId, new HashSet<AttributeAlias>());
+        }
+        return deviceAliases.get(deviceId);
+    }
+
+    public final void refresh() {
+        if (dataManager != null) {
+            try {
+                deviceAliases.clear();
+                for (AttributeAlias attributeAlias : dataManager.getAttributeAliases()) {
+                    getDeviceAttributeAliases(attributeAlias.getDeviceId())
+                            .add(attributeAlias);
+                    aliasesById.put(attributeAlias.getId(), attributeAlias);
+                }
+            } catch (SQLException error) {
+                Log.warning(error);
+            }
+        }
+    }
+
+    public void removeDevice(long deviceId) {
+        for (AttributeAlias attributeAlias : getDeviceAttributeAliases(deviceId)) {
+            aliasesById.remove(attributeAlias.getId());
+        }
+        deviceAliases.remove(deviceId);
+    }
+
+    public void addAttributeAlias(AttributeAlias attributeAlias) throws SQLException {
+        dataManager.addAttributeAlias(attributeAlias);
+        aliasesById.put(attributeAlias.getId(), attributeAlias);
+        getDeviceAttributeAliases(attributeAlias.getDeviceId()).add(attributeAlias);
+    }
+
+    public void updateAttributeAlias(AttributeAlias attributeAlias) throws SQLException {
+        dataManager.updateAttributeAlias(attributeAlias);
+        AttributeAlias cachedAlias = aliasesById.get(attributeAlias.getId());
+        if (cachedAlias.getDeviceId() != attributeAlias.getDeviceId()) {
+            getDeviceAttributeAliases(cachedAlias.getDeviceId()).remove(cachedAlias);
+            cachedAlias.setDeviceId(attributeAlias.getDeviceId());
+            getDeviceAttributeAliases(cachedAlias.getDeviceId()).add(cachedAlias);
+        }
+        cachedAlias.setAttribute(attributeAlias.getAttribute());
+        cachedAlias.setAlias(attributeAlias.getAlias());
+    }
+
+    public void removeArrtibuteAlias(long attributeAliasId) throws SQLException {
+        dataManager.removeAttributeAlias(attributeAliasId);
+        AttributeAlias cachedAlias = aliasesById.get(attributeAliasId);
+        getDeviceAttributeAliases(cachedAlias.getDeviceId()).remove(cachedAlias);
+        aliasesById.remove(attributeAliasId);
+    }
+
+    public AttributeAlias getDeviceAliasByAttribute(long deviceId, String attribute) {
+        for (AttributeAlias alias : getDeviceAttributeAliases(deviceId)) {
+            if (alias.getAttribute().equals(attribute)) {
+                return alias;
+            }
+        }
+        return null;
+    }
+
+    public Collection<AttributeAlias> getUserDevicesAttributeAliases(long userId) {
+        Collection<AttributeAlias> userDevicesAliases = new ArrayList<>();
+        for (long deviceId : Context.getPermissionsManager().getDevicePermissions(userId)) {
+            userDevicesAliases.addAll(getDeviceAttributeAliases(deviceId));
+        }
+        return userDevicesAliases;
+    }
+
+    public AttributeAlias getAttributeAliasById(long id) {
+        return aliasesById.get(id);
+    }
+
+}