Fixed multiple issues causing dangling references to discarded queries

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

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CollectionUnaryQuery.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CollectionUnaryQuery.java
index 255054e12a90ec3600db6bf8e5190e13283600ff..2eaeca472c2088d7d10156cc678506004dfdacbc 100644 (file)
--- a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CollectionUnaryQuery.java
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CollectionUnaryQuery.java
@@ -1,37 +1,105 @@
-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- *     VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-package org.simantics.db.impl.query;\r
-\r
-\r
-\r
-\r
-abstract public class CollectionUnaryQuery<T> extends UnaryQuery<T> {\r
-    \r
-    public CollectionUnaryQuery(final int id) {\r
-        super(id);\r
-    }\r
-    \r
-    @Override\r
-    public void clearResult(QuerySupport support) {\r
-       setResult(new IntArray());\r
-    }\r
-    \r
-    @Override\r
-    public void setReady() {\r
-       super.setReady();\r
-       IntArray v = (IntArray)getResult();\r
-       int size = v.size();\r
-        if(size == 0) setResult(IntArray.EMPTY);\r
-        else v.trim();\r
-    }\r
-    \r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2018 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;
+import org.simantics.db.impl.procedure.IntProcedureAdapter;
+
+public abstract class CollectionUnaryQuery extends UnaryQuery<IntProcedure> implements IntProcedure {
+    
+    public CollectionUnaryQuery(final int id) {
+        super(id);
+    }
+    
+    public abstract void compute(ReadGraphImpl graph, IntProcedure procedure) throws DatabaseException;
+
+    @Override
+    public final void clearResult(QuerySupport support) {
+       setResult(new IntArray());
+    }
+    
+    @Override
+    public final void setReady() {
+       super.setReady();
+       IntArray v = (IntArray)getResult();
+       int size = v.size();
+        if(size == 0) setResult(IntArray.EMPTY);
+        else v.trim();
+    }
+    
+    @Override
+    public final Object performFromCache(ReadGraphImpl graph, final IntProcedure procedure) throws DatabaseException {
+
+        assert(isReady());
+
+        if(handleException(graph, procedure)) return EXCEPTED;
+        
+        final IntArray value = (IntArray)getResult();
+        if(value.data == null) {
+            if(value.sizeOrData != IntArray.NO_DATA) procedure.execute(graph, value.sizeOrData);
+        } else {
+            for(int i = 0;i < value.sizeOrData ; i++) procedure.execute(graph, value.data[i]);
+        }
+
+        procedure.finished(graph);
+        
+        return getResult();
+
+    }
+
+    @Override
+    public final void recompute(ReadGraphImpl graph) throws DatabaseException {
+
+        compute(graph, new IntProcedureAdapter() {
+
+            @Override
+            public void finished(ReadGraphImpl graph) {
+            }
+
+            @Override
+            public void exception(ReadGraphImpl graph, Throwable t) {
+                new Error("Error in recompute.", t).printStackTrace();
+            }
+
+        });
+
+    }
+    
+    @Override
+    final boolean isImmutable(ReadGraphImpl graph) {
+        return graph.processor.isImmutable(id);
+    }
+
+    @Override
+    public final void execute(ReadGraphImpl graph, int i) throws DatabaseException {
+        IntArray v = (IntArray)getResult();
+        v.add(i);
+    }
+
+    @Override
+    public final void finished(ReadGraphImpl graph) throws DatabaseException {
+        setReady();
+    }
+
+    @Override
+    public final void exception(ReadGraphImpl graph, Throwable throwable) throws DatabaseException {
+        except(throwable);
+    }
+
+    @Override
+    public void serializeValue(QuerySerializer serializer) {
+        IntArray is = getResult();
+        is.serialize(serializer);
+    }
+    
+}