--- /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 java.util.concurrent.Semaphore;\r
+\r
+import org.simantics.db.common.exception.DebugException;\r
+import org.simantics.db.impl.graph.ReadGraphImpl;\r
+import org.simantics.db.impl.procedure.IntProcedureAdapter;\r
+import org.simantics.db.procedure.ListenerBase;\r
+\r
+final public class DirectPredicates extends CollectionUnaryQuery<IntProcedure> {\r
+\r
+ private DirectPredicates(final int resource) {\r
+ super(resource);\r
+ }\r
+\r
+ final static DirectPredicates entry(final QueryProcessor provider, final int r) {\r
+\r
+ return (DirectPredicates)provider.directPredicatesMap.get(r);\r
+\r
+ }\r
+\r
+ final static void runner(ReadGraphImpl graph, final int r, final QueryProcessor provider, final CacheEntry parent, final ListenerBase listener, final IntProcedure procedure) {\r
+\r
+ DirectPredicates entry = (DirectPredicates)provider.directPredicatesMap.get(r);\r
+ if(entry == null) {\r
+\r
+ entry = new DirectPredicates(r);\r
+ entry.setPending();\r
+ entry.clearResult(provider.querySupport);\r
+ entry.putEntry(provider);\r
+ \r
+ provider.performForEach(graph, entry, parent, listener, procedure);\r
+ \r
+ } else {\r
+ \r
+ if(!entry.isReady()) {\r
+ synchronized(entry) {\r
+ if(!entry.isReady()) {\r
+ provider.registerDependencies(graph, entry, parent, listener, procedure, false);\r
+ entry.computeForEach(graph, provider, procedure, true);\r
+ return;\r
+ }\r
+ }\r
+ }\r
+ \r
+ provider.performForEach(graph, entry, parent, listener, procedure);\r
+ \r
+ }\r
+\r
+ }\r
+\r
+ final public static void queryEach(ReadGraphImpl graph, final int r, final QueryProcessor provider, final CacheEntry parent, final ListenerBase listener, final IntProcedure procedure) {\r
+\r
+ if(parent == null && listener == null) {\r
+ DirectPredicates entry = (DirectPredicates)provider.directPredicatesMap.get(r);\r
+ if(entry != null && entry.isReady()) { \r
+ entry.performFromCache(graph, provider, procedure);\r
+ return;\r
+ } else {\r
+ computeForEach(graph, r, null, procedure, false);\r
+ return;\r
+ }\r
+ }\r
+\r
+ runner(graph, r, provider, parent, listener, procedure);\r
+\r
+ }\r
+\r
+ \r
+ @Override\r
+ public void clearResult(QuerySupport support) {\r
+ // The cached result is never used\r
+ setResult(INVALID_RESULT);\r
+ }\r
+ \r
+ @Override\r
+ public UnaryQuery<IntProcedure> getEntry(QueryProcessor provider) {\r
+ return provider.directPredicatesMap.get(id);\r
+ }\r
+\r
+ @Override\r
+ public void putEntry(QueryProcessor provider) {\r
+ provider.directPredicatesMap.put(id, this);\r
+ }\r
+\r
+ @Override\r
+ final public void removeEntry(QueryProcessor provider) {\r
+ provider.directPredicatesMap.remove(id);\r
+ }\r
+\r
+ @Override\r
+ public Object computeForEach(ReadGraphImpl graph, QueryProcessor provider, IntProcedure procedure, boolean store) {\r
+ return computeForEach(graph, id, this, procedure, store);\r
+ }\r
+ \r
+ public static Object computeForEach(ReadGraphImpl graph, int id, final DirectPredicates entry, final IntProcedure procedure, final boolean store) {\r
+\r
+ graph.processor.querySupport.ensureLoaded(graph, id);\r
+ \r
+ final IntArray list = new IntArray();\r
+\r
+ graph.processor.querySupport.getPredicates(graph, id, new IntProcedure() {\r
+\r
+ @Override\r
+ public void execute(ReadGraphImpl graph, int i) {\r
+ list.add(i);\r
+ }\r
+\r
+ @Override\r
+ public void finished(ReadGraphImpl graph) {\r
+ }\r
+\r
+ @Override\r
+ public void exception(ReadGraphImpl graph, Throwable t) {\r
+ if(DebugException.DEBUG) new DebugException(t).printStackTrace();\r
+ }\r
+\r
+ });\r
+\r
+ if(entry != null)\r
+ entry.finish(graph, graph.processor);\r
+\r
+ if(list.data == null) {\r
+ if(list.sizeOrData != IntArray.NO_DATA) procedure.execute(graph, list.sizeOrData);\r
+ } else {\r
+ for(int i = 0;i < list.sizeOrData ; i++) procedure.execute(graph, list.data[i]);\r
+ }\r
+\r
+ procedure.finished(graph);\r
+ \r
+ return list;\r
+\r
+ }\r
+\r
+ @Override\r
+ public String toString() {\r
+ return "DirectPredicates[" + id + "]";\r
+ }\r
+\r
+ @Override\r
+ public void setReady() {\r
+ statusOrException = READY;\r
+ }\r
+ \r
+ final private void finish(ReadGraphImpl graph, QueryProcessor provider) {\r
+\r
+ setReady();\r
+\r
+ }\r
+\r
+ @Override\r
+ public Object performFromCache(ReadGraphImpl graph, QueryProcessor provider, IntProcedure procedure) {\r
+\r
+ assert(isReady());\r
+\r
+ return computeForEach(graph, provider, procedure, false);\r
+\r
+ }\r
+\r
+ @Override\r
+ public void recompute(ReadGraphImpl graph, QueryProcessor provider) {\r
+\r
+ final Semaphore s = new Semaphore(0);\r
+\r
+ computeForEach(graph, provider, new IntProcedureAdapter() {\r
+\r
+ @Override\r
+ public void finished(ReadGraphImpl graph) {\r
+ s.release();\r
+ }\r
+\r
+ @Override\r
+ public void exception(ReadGraphImpl graph, Throwable t) {\r
+ s.release();\r
+ new Error("Error in recompute.", t).printStackTrace();\r
+ }\r
+\r
+ }, true);\r
+\r
+ while(!s.tryAcquire()) {\r
+ provider.resume(graph);\r
+ }\r
+\r
+ }\r
+\r
+\r
+ @Override\r
+ boolean isImmutable(ReadGraphImpl graph) {\r
+ return graph.processor.isImmutable(id);\r
+ }\r
+\r
+}\r