DB query swapping to file system

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

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/QueryFactoryBase.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/QueryFactoryBase.java
new file mode 100644 (file)
index 0000000..a193cce
--- /dev/null
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/QueryFactoryBase.java
@@ -0,0 +1,25 @@
+package org.simantics.db.impl.query;
+
+import org.simantics.db.exception.DatabaseException;
+
+abstract public class QueryFactoryBase implements QueryFactory {
+
+    abstract protected CacheEntryBase readKeyAndValue(QueryDeserializer deserializer) throws DatabaseException;
+
+    public void readParents(QueryDeserializer deserializer, CacheEntryBase entry) throws DatabaseException {
+        int ps = deserializer.readLE4();
+        for(int i=0;i<ps;i++) {
+            QueryFactory qf = deserializer.readFactory();
+            CacheEntryBase ceb = qf.reference(deserializer);
+            entry.addParent(ceb);
+        }
+    }
+    
+    @Override
+    final public CacheEntryBase read(QueryDeserializer deserializer) throws DatabaseException {
+        CacheEntryBase entry = readKeyAndValue(deserializer);
+        readParents(deserializer, entry);
+        return entry;
+    }
+
+}