Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / request / AsyncMappedParts.java

diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/request/AsyncMappedParts.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/AsyncMappedParts.java
new file mode 100644 (file)
index 0000000..3fa5281
--- /dev/null
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/AsyncMappedParts.java
@@ -0,0 +1,73 @@
+/*******************************************************************************\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.common.request;\r
+\r
+import java.util.Map;\r
+import java.util.concurrent.ConcurrentHashMap;\r
+import java.util.concurrent.atomic.AtomicInteger;\r
+\r
+import org.simantics.db.AsyncReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.procedure.adapter.AsyncMultiProcedureAdapter;\r
+import org.simantics.db.common.procedure.adapter.AsyncProcedureAdapter;\r
+import org.simantics.db.procedure.AsyncProcedure;\r
+import org.simantics.layer0.Layer0;\r
+import org.simantics.operation.Layer0X;\r
+\r
+/**\r
+ * Asynchronous version of {@link MappedParts}.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class AsyncMappedParts extends ResourceAsyncRead<Map<Resource, Resource>> {\r
+\r
+    public AsyncMappedParts(Resource flat) {\r
+        super(flat);\r
+    }\r
+\r
+    @Override\r
+    public void perform(AsyncReadGraph graph, final AsyncProcedure<Map<Resource, Resource>> procedure) {\r
+\r
+        final AtomicInteger done = new AtomicInteger(1);\r
+        final Layer0 l0 = graph.getService(Layer0.class);\r
+        final Layer0X L0X = graph.getService(Layer0X.class);\r
+        final Map<Resource, Resource> result = new ConcurrentHashMap<Resource, Resource>();\r
+\r
+        graph.forEachObject(resource, l0.ConsistsOf, new AsyncMultiProcedureAdapter<Resource>() {\r
+            @Override\r
+            public void execute(AsyncReadGraph graph, final Resource part) {\r
+                done.incrementAndGet();\r
+                graph.forPossibleObject(part, L0X.Represents, new AsyncProcedureAdapter<Resource>() {\r
+                    @Override\r
+                    public void execute(AsyncReadGraph graph, Resource represents) {\r
+                        if (represents != null)\r
+                            result.put(represents, part);\r
+                        if(done.decrementAndGet() == 0) {\r
+                            procedure.execute(graph, result);\r
+                        }\r
+                    }\r
+                });\r
+            }\r
+            @Override\r
+            public void exception(AsyncReadGraph graph, Throwable t) {\r
+                procedure.exception(graph, t);\r
+            }\r
+            @Override\r
+            public void finished(AsyncReadGraph graph) {\r
+                if(done.decrementAndGet() == 0) {\r
+                    procedure.execute(graph, result);\r
+                }\r
+            }\r
+        });\r
+    }\r
+\r
+}\r