--- /dev/null
+/*******************************************************************************\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 gnu.trove.procedure.TIntProcedure;\r
+import gnu.trove.set.hash.TIntHashSet;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.impl.graph.ReadGraphImpl;\r
+import org.simantics.db.procedure.AsyncProcedure;\r
+import org.simantics.db.procedure.ListenerBase;\r
+\r
+final public class PossibleSuperRelation extends UnaryQuery<IntProcedure> {\r
+\r
+ private PossibleSuperRelation(final int resource) {\r
+ super(resource);\r
+ }\r
+\r
+ final public static void queryEach(ReadGraphImpl graph, final int r, final QueryProcessor provider, final CacheEntry parent, final ListenerBase listener, final AsyncProcedure<Resource> procedure) {\r
+\r
+ int result = provider.querySupport.getSingleSuperrelation(r);\r
+ if(result != 0) {\r
+ procedure.execute(graph, provider.querySupport.getResource(result));\r
+ } else {\r
+ procedure.execute(graph, null);\r
+ }\r
+\r
+ }\r
+\r
+ @Override\r
+ public UnaryQuery<IntProcedure> getEntry(QueryProcessor provider) {\r
+ return null;\r
+ }\r
+\r
+ @Override\r
+ public void putEntry(QueryProcessor provider) {\r
+ }\r
+\r
+ @Override\r
+ final public void removeEntry(QueryProcessor provider) {\r
+ }\r
+\r
+ class Koss {\r
+\r
+ private TIntHashSet set = null;\r
+ public int single = 0;\r
+\r
+ public boolean add(int val) {\r
+ if(single == val) return false;\r
+ if(single == 0) {\r
+ single = val;\r
+ return true;\r
+ }\r
+ if(set == null) set = new TIntHashSet(4);\r
+ return set.add(val);\r
+ }\r
+\r
+ public int size() {\r
+\r
+ if(single == 0) return 0;\r
+ if(set == null) return 1;\r
+ return set.size() + 1;\r
+\r
+ }\r
+\r
+ // public int[] toArray() {\r
+ // \r
+ // int[] result = Arrays.copyOf(set.toArray(), set.size() + 1);\r
+ // result[set.size()] = single;\r
+ // return result;\r
+ // \r
+ // }\r
+ // \r
+\r
+ public void forEach(TIntProcedure proc) {\r
+ if(single > 0) proc.execute(single);\r
+ if(set != null) set.forEach(proc);\r
+ }\r
+\r
+ }\r
+\r
+ @Override\r
+ public Object computeForEach(final ReadGraphImpl graph, final QueryProcessor provider, final IntProcedure procedure, final boolean store) {\r
+\r
+ provider.querySupport.ensureLoaded(graph, id);\r
+ int single = provider.querySupport.getSingleSuperrelation(id);\r
+ if(single > 0) {\r
+ procedure.execute(graph, single);\r
+ procedure.finished(graph);\r
+ return single;\r
+ }\r
+\r
+ final int subrelationOf = provider.getSubrelationOf();\r
+\r
+ final IntSet result = new IntSet(provider.querySupport);\r
+\r
+ final class DirectProcedure extends Koss implements IntProcedure, TIntProcedure {\r
+ @Override\r
+ final public boolean execute(int r) {\r
+ result.add(r);\r
+ return true;\r
+ }\r
+ @Override\r
+ final public void execute(ReadGraphImpl graph, int r) {\r
+ if(single == 0) {\r
+ single = r;\r
+ return;\r
+ }\r
+ add(r);\r
+ }\r
+ @Override\r
+ public void finished(ReadGraphImpl graph) {\r
+ }\r
+ @Override\r
+ public void exception(ReadGraphImpl graph, Throwable t) {\r
+ throw new Error("Errors are not supported.", t);\r
+ }\r
+\r
+ }\r
+\r
+ final DirectProcedure directProc = new DirectProcedure();\r
+\r
+ provider.querySupport.getObjects(graph, id, subrelationOf, directProc);\r
+\r
+ int size = directProc.size();\r
+\r
+ if(size == 0) {\r
+\r
+ procedure.finished(graph);\r
+\r
+ } else if (size == 1) {\r
+\r
+ procedure.execute(graph, directProc.single);\r
+ procedure.finished(graph);\r
+\r
+ } else {\r
+\r
+ directProc.forEach(new TIntProcedure() {\r
+\r
+ @Override\r
+ public boolean execute(int arg0) {\r
+\r
+ procedure.execute(graph, arg0);\r
+ return true;\r
+\r
+ }\r
+\r
+ });\r
+\r
+ procedure.finished(graph);\r
+\r
+ }\r
+ \r
+ return result;\r
+\r
+ }\r
+\r
+ @Override\r
+ public String toString() {\r
+ return "SuperRelations2[" + id + "]";\r
+ }\r
+\r
+ @Override\r
+ public Object performFromCache(ReadGraphImpl graph, QueryProcessor provider, IntProcedure procedure) {\r
+ throw new UnsupportedOperationException();\r
+ }\r
+\r
+ @Override\r
+ public void recompute(ReadGraphImpl graph, QueryProcessor provider) {\r
+\r
+ }\r
+\r
+}\r