Fixed multiple issues causing dangling references to discarded queries

[simantics/platform.git] / bundles / org.simantics.db.impl / src / org / simantics / db / impl / query / CacheEntry.java

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CacheEntry.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CacheEntry.java
index 1cdcbde9dd0b11733b224877c4a5a0c7cf41cbe7..a650f32ce8dc6ee1f70166cbb3e21c31b6604f17 100644 (file)
--- a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CacheEntry.java
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CacheEntry.java
@@ -11,6 +11,8 @@
  *******************************************************************************/
 package org.simantics.db.impl.query;
 
+import java.util.Collection;
+
 import org.simantics.db.exception.DatabaseException;
 import org.simantics.db.impl.graph.ReadGraphImpl;
 
@@ -40,10 +42,11 @@ public abstract class CacheEntry<Procedure> {
     abstract Query getQuery();
 
     abstract CacheEntry pruneFirstParents();
+    abstract void pruneParentSet();
     abstract void removeParent(CacheEntry entry);
     abstract void addParent(CacheEntry entry);
     abstract boolean hasParents();
-    abstract Iterable<CacheEntry<?>> getParents(QueryProcessor processor);
+    abstract Collection<CacheEntry<?>> getParents(QueryProcessor processor);
     abstract CacheEntry getFirstParent(QueryProcessor processor);
     abstract boolean moreThanOneParent(QueryProcessor processor);
     abstract int parentCount(QueryProcessor processor);