X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.db.impl%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fimpl%2Fquery%2FCacheEntry.java;fp=bundles%2Forg.simantics.db.impl%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fimpl%2Fquery%2FCacheEntry.java;h=cb80a6e641cecd3b5e3e1bc14e8c2fe793c36d12;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

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
new file mode 100644
index 000000000..cb80a6e64
--- /dev/null
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CacheEntry.java
@@ -0,0 +1,66 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.impl.query;
+
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.impl.graph.ReadGraphImpl;
+
+
+
+public abstract class CacheEntry {
+	
+    final public static int HAS_BEEN_BOUND = 1;
+
+    abstract boolean isFresh();
+    abstract boolean isReady();
+    abstract boolean isRefuted();
+    abstract boolean isPending();
+    abstract boolean isDiscarded();
+    abstract boolean isExcepted();
+
+    abstract void setReady();
+    abstract void refute();
+    abstract void setPending();
+    abstract void discard();
+    abstract void except(Throwable t);
+    abstract void setResult(Object result);
+    abstract void clearResult(QuerySupport support);
+
+    abstract void prepareRecompute(QuerySupport querySupport);
+    
+    abstract public Object getOriginalRequest();
+    abstract Query getQuery();
+    abstract <T> T getResult();
+
+    abstract CacheEntry pruneFirstParents();
+    abstract void removeParent(CacheEntry entry);
+    abstract void addParent(CacheEntry entry);
+    abstract boolean hasParents();
+    abstract Iterable<CacheEntry> getParents(QueryProcessor processor);
+    abstract CacheEntry getFirstParent(QueryProcessor processor);
+    abstract boolean moreThanOneParent(QueryProcessor processor);
+    abstract int parentCount(QueryProcessor processor);
+    
+    abstract void performFromCache(ReadGraphImpl graph, Object provider, Object procedure);
+    
+    abstract boolean isImmutable(ReadGraphImpl graph) throws DatabaseException;
+    
+    abstract boolean shouldBeCollected();
+    
+    abstract short getLevel();
+    abstract short setLevel(short level);
+    
+    abstract int getGCStatus();
+    abstract int setGCStatus(int status);
+    abstract void setGCStatusFlag(int flag, boolean value);
+
+}