Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.graph.impl / src / org / simantics / browsing / ui / graph / impl / contribution / FinalImagerContributionImpl.java

diff --git a/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contribution/FinalImagerContributionImpl.java b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contribution/FinalImagerContributionImpl.java
new file mode 100644 (file)
index 0000000..aa3f203
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contribution/FinalImagerContributionImpl.java
@@ -0,0 +1,133 @@
+/*******************************************************************************\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.browsing.ui.graph.impl.contribution;\r
+\r
+import java.util.Collections;\r
+import java.util.Map;\r
+\r
+import org.eclipse.jface.resource.ImageDescriptor;\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.BuiltinKeys.ImagerKey;\r
+import org.simantics.browsing.ui.DataSource;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
+import org.simantics.browsing.ui.content.Imager;\r
+import org.simantics.browsing.ui.graph.impl.request.ResourceQuery;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.exception.PendingVariableException;\r
+import org.simantics.db.procedure.Listener;\r
+import org.simantics.db.procedure.Procedure;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+\r
+public abstract class FinalImagerContributionImpl implements Imager {\r
+\r
+    private final static Map<String, ImageDescriptor>         PENDING = Collections.emptyMap();\r
+\r
+    protected final PrimitiveQueryUpdater                     updater;\r
+    private final ResourceQuery<Map<String, ImageDescriptor>> imagerQuery;\r
+    \r
+    protected final NodeContext                                 context;\r
+    private final BuiltinKeys.ImagerKey                       key;\r
+\r
+    protected Map<String, ImageDescriptor>                      content = null;\r
+\r
+    public Object getIdentity(ImagerKey key) {\r
+        return key;\r
+    }\r
+\r
+    public FinalImagerContributionImpl(final PrimitiveQueryUpdater updater, final NodeContext context, final ImagerKey key) {\r
+\r
+        this.updater = updater;\r
+        this.context = context;\r
+        this.key = key;\r
+\r
+        imagerQuery = new ResourceQuery<Map<String, ImageDescriptor>>(getIdentity(key), context) {\r
+\r
+            @Override\r
+            public Map<String, ImageDescriptor> perform(ReadGraph graph) throws DatabaseException {\r
+                try {\r
+                    return getDescriptors(graph, context);\r
+                } catch (PendingVariableException e) {\r
+                    return PENDING;\r
+                } catch (DatabaseException e) {\r
+                    throw e;\r
+                } catch (Throwable t) {\r
+                    ErrorLogger.defaultLogError("LazyGraphLabeler.labelQuery produced unexpected exception.", t);\r
+                    return null;\r
+                }\r
+            }\r
+\r
+            @Override\r
+            public String toString() {\r
+                return FinalImagerContributionImpl.this + " with context " + context;\r
+            }\r
+\r
+        };\r
+\r
+    }\r
+\r
+    protected Procedure<Map<String, ImageDescriptor>> createProcedure() {\r
+\r
+        return new Procedure<Map<String, ImageDescriptor>>() {\r
+\r
+            @Override\r
+            public void execute(Map<String, ImageDescriptor> result) {\r
+                replaceResult(result);\r
+            }\r
+\r
+            @Override\r
+            public void exception(Throwable t) {\r
+                ErrorLogger.defaultLogError("FinalImagerContributionImpl.imagerQuery failed, see exception for details.", t);\r
+            }\r
+\r
+        };\r
+\r
+    }\r
+\r
+    protected void replaceResult(Map<String, ImageDescriptor> desc) {\r
+        content = desc;\r
+        updater.scheduleReplace(context, key, this);\r
+    }\r
+\r
+    @SuppressWarnings("unchecked")\r
+    @Override\r
+    public ImageDescriptor getImage(String key) {\r
+       \r
+        if (content == null) {\r
+\r
+            content = PENDING;\r
+\r
+            final DataSource<ReadGraph> source = updater.getDataSource(ReadGraph.class);\r
+            assert(source != null);\r
+\r
+            final Procedure<Map<String, ImageDescriptor>> procedure = createProcedure();\r
+            source.schedule(graph -> {\r
+                if(procedure instanceof Listener<?>)\r
+                    graph.asyncRequest(imagerQuery, (Listener<Map<String, ImageDescriptor>>)procedure);\r
+                else\r
+                    graph.asyncRequest(imagerQuery, procedure);\r
+            });\r
+\r
+            return null;\r
+\r
+        }\r
+\r
+        ImageDescriptor descriptor = content.get(key);\r
+        return descriptor;\r
+    }\r
+\r
+    // OVERRIDE\r
+\r
+    public abstract Map<String, ImageDescriptor> getDescriptors(ReadGraph graph, NodeContext context) throws DatabaseException;\r
+\r
+}\r