1 files changed, 38 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/storage/query/Condition.java b/src/main/java/org/traccar/storage/query/Condition.java
index 82c8e8479..304440698 100644
--- a/src/main/java/org/traccar/storage/query/Condition.java
+++ b/src/main/java/org/traccar/storage/query/Condition.java
@@ -1,7 +1,21 @@
 package org.traccar.storage.query;
 
+import java.util.List;
+
 public interface Condition {
 
+    static Condition merge(List<Condition> conditions) {
+        Condition result = null;
+        var iterator = conditions.iterator();
+        if (iterator.hasNext()) {
+            result = iterator.next();
+            while (iterator.hasNext()) {
+                result = new Condition.And(result, iterator.next());
+            }
+        }
+        return result;
+    }
+
     class Equals extends Compare {
         public Equals(String column, String variable) {
             this(column, variable, null);
@@ -114,4 +128,28 @@ public interface Condition {
         }
     }
 
+    class Permission implements Condition {
+        private final Class<?> ownerClass;
+        private final long ownerId;
+        private final Class<?> propertyClass;
+
+        public Permission(Class<?> ownerClass, long ownerId, Class<?> propertyClass) {
+            this.ownerClass = ownerClass;
+            this.ownerId = ownerId;
+            this.propertyClass = propertyClass;
+        }
+
+        public Class<?> getOwnerClass() {
+            return ownerClass;
+        }
+
+        public long getOwnerId() {
+            return ownerId;
+        }
+
+        public Class<?> getPropertyClass() {
+            return propertyClass;
+        }
+    }
+
 }