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-rw-r--r--src/org/traccar/database/DataManager.java20
1 files changed, 20 insertions, 0 deletions
diff --git a/src/org/traccar/database/DataManager.java b/src/org/traccar/database/DataManager.java
index 7baa1df47..eb0be9274 100644
--- a/src/org/traccar/database/DataManager.java
+++ b/src/org/traccar/database/DataManager.java
@@ -25,7 +25,9 @@ import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
+import java.util.HashSet;
import java.util.Map;
+import java.util.Set;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import javax.naming.InitialContext;
@@ -391,7 +393,24 @@ public class DataManager implements IdentityManager {
return groups;
}
+ private void checkGroupCycles(Group group) {
+ groupsLock.readLock().lock();
+ try {
+ Set<Long> groups = new HashSet<>();
+ while (group != null) {
+ if (groups.contains(group.getId())) {
+ throw new IllegalArgumentException("Cycle in group hierarchy");
+ }
+ groups.add(group.getId());
+ group = groupsById.get(group.getGroupId());
+ }
+ } finally {
+ groupsLock.readLock().unlock();
+ }
+ }
+
public void addGroup(Group group) throws SQLException {
+ checkGroupCycles(group);
group.setId(QueryBuilder.create(dataSource, getQuery("database.insertGroup"), true)
.setObject(group)
.executeUpdate());
@@ -399,6 +418,7 @@ public class DataManager implements IdentityManager {
}
public void updateGroup(Group group) throws SQLException {
+ checkGroupCycles(group);
QueryBuilder.create(dataSource, getQuery("database.updateGroup"))
.setObject(group)
.executeUpdate();