X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Frequest%2FAsyncMappedParts.java;fp=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Frequest%2FAsyncMappedParts.java;h=3fa52810f1130ac672900d06163e83dc953b0ddc;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

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
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+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/AsyncMappedParts.java
@@ -0,0 +1,73 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 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.common.request;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.procedure.adapter.AsyncMultiProcedureAdapter;
+import org.simantics.db.common.procedure.adapter.AsyncProcedureAdapter;
+import org.simantics.db.procedure.AsyncProcedure;
+import org.simantics.layer0.Layer0;
+import org.simantics.operation.Layer0X;
+
+/**
+ * Asynchronous version of {@link MappedParts}.
+ * 
+ * @author Tuukka Lehtonen
+ */
+public class AsyncMappedParts extends ResourceAsyncRead<Map<Resource, Resource>> {
+
+    public AsyncMappedParts(Resource flat) {
+        super(flat);
+    }
+
+    @Override
+    public void perform(AsyncReadGraph graph, final AsyncProcedure<Map<Resource, Resource>> procedure) {
+
+        final AtomicInteger done = new AtomicInteger(1);
+        final Layer0 l0 = graph.getService(Layer0.class);
+        final Layer0X L0X = graph.getService(Layer0X.class);
+        final Map<Resource, Resource> result = new ConcurrentHashMap<Resource, Resource>();
+
+        graph.forEachObject(resource, l0.ConsistsOf, new AsyncMultiProcedureAdapter<Resource>() {
+            @Override
+            public void execute(AsyncReadGraph graph, final Resource part) {
+                done.incrementAndGet();
+                graph.forPossibleObject(part, L0X.Represents, new AsyncProcedureAdapter<Resource>() {
+                    @Override
+                    public void execute(AsyncReadGraph graph, Resource represents) {
+                        if (represents != null)
+                            result.put(represents, part);
+                        if(done.decrementAndGet() == 0) {
+                            procedure.execute(graph, result);
+                        }
+                    }
+                });
+            }
+            @Override
+            public void exception(AsyncReadGraph graph, Throwable t) {
+                procedure.exception(graph, t);
+            }
+            @Override
+            public void finished(AsyncReadGraph graph) {
+                if(done.decrementAndGet() == 0) {
+                    procedure.execute(graph, result);
+                }
+            }
+        });
+    }
+
+}