Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/UnaryQuery.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/UnaryQuery.java
new file mode 100644 (file)
index 0000000..4f95fde
--- /dev/null
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/UnaryQuery.java
@@ -0,0 +1,86 @@
+/*******************************************************************************\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
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.impl.graph.ReadGraphImpl;\r
+import org.simantics.db.request.RequestFlags;\r
+\r
+abstract public class UnaryQuery<Procedure> extends CacheEntryBase implements Query {\r
+       \r
+    final public int id;\r
+\r
+    public UnaryQuery(int r) {\r
+        assert(r != 0);\r
+       this.id = r;\r
+    }\r
+    \r
+    @Override\r
+    int makeHash() {\r
+       return id;\r
+    }\r
+    \r
+    @Override\r
+    public int type() {\r
+        return RequestFlags.INVALIDATE;\r
+    }\r
+    \r
+    @Override\r
+    final public boolean equals(Object object) {\r
+        if (this == object)\r
+            return true;\r
+        else if (object == null)\r
+            return false;\r
+        else if (getClass() != object.getClass())\r
+            return false;\r
+        UnaryQuery<?> other = (UnaryQuery<?>)object;\r
+        return id == other.id;\r
+    }\r
+    \r
+    @Override\r
+    final public Query getQuery() {\r
+        assert(!isDiscarded());\r
+        return this;\r
+    }\r
+    \r
+    @Override\r
+    public void recompute(ReadGraphImpl graph, Object provider, CacheEntry entry) {\r
+        recompute(graph, (QueryProcessor)provider);\r
+    }\r
+    \r
+    @Override\r
+    public void performFromCache(ReadGraphImpl graph, Object provider, Object procedure) {\r
+        performFromCache(graph, (QueryProcessor)provider, (Procedure)procedure);\r
+    }\r
+    \r
+    abstract public void recompute(ReadGraphImpl graph, QueryProcessor provider);\r
+    abstract public Object computeForEach(ReadGraphImpl graph, QueryProcessor provider, Procedure procedure, boolean store);\r
+    abstract public Object performFromCache(ReadGraphImpl graph, QueryProcessor provider, Procedure procedure);\r
+    abstract public void putEntry(QueryProcessor provider);\r
+    abstract public void removeEntry(QueryProcessor provider);\r
+    abstract public UnaryQuery<Procedure> getEntry(QueryProcessor provider);\r
+       \r
+    public Object get(ReadGraphImpl graph, QueryProcessor processor, Object procedure) throws Throwable {\r
+        if(procedure != null) {\r
+            performFromCache(graph, processor, procedure);\r
+        } else {\r
+            checkAndThrow();\r
+        }\r
+        return getResult();\r
+    }\r
+    \r
+    @Override\r
+    boolean isImmutable(ReadGraphImpl graph) throws DatabaseException {\r
+               return graph.processor.isImmutable(id);\r
+    }\r
+    \r
+}\r