git-svn-id: https://www.simantics.org/svn/simantics/3d/trunk@22280 ac1ea38d-2e2b...

[simantics/3d.git] / org.simantics.g3d / src / org / simantics / proconf / g3d / base / GeometryProviderRegistry.java

diff --git a/org.simantics.g3d/src/org/simantics/proconf/g3d/base/GeometryProviderRegistry.java b/org.simantics.g3d/src/org/simantics/proconf/g3d/base/GeometryProviderRegistry.java
new file mode 100644 (file)
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+++ b/org.simantics.g3d/src/org/simantics/proconf/g3d/base/GeometryProviderRegistry.java
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+/*******************************************************************************\r
+ * Copyright (c) 2007- VTT Technical Research Centre of Finland.\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.proconf.g3d.base;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.HashMap;\r
+import java.util.List;\r
+import java.util.Map;\r
+\r
+import org.eclipse.core.runtime.CoreException;\r
+import org.eclipse.core.runtime.IConfigurationElement;\r
+import org.eclipse.core.runtime.IExtension;\r
+import org.eclipse.core.runtime.IExtensionPoint;\r
+import org.eclipse.core.runtime.Platform;\r
+import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;\r
+import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;\r
+import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;\r
+import org.eclipse.core.runtime.dynamichelpers.IFilter;\r
+import org.simantics.db.Resource;\r
+import org.simantics.layer0.utils.IEntity;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+\r
+import com.jme.scene.Geometry;\r
+\r
+public class GeometryProviderRegistry implements IExtensionChangeHandler {\r
+    private static GeometryProviderRegistry instance;\r
+    public final static String ELEMENT_NAME = "Geometry";\r
+    public final static String NAMESPACE = "org.simantics.proconf.g3d";\r
+    public final static String EP_NAME = "geometry";\r
+    \r
+    private ExtensionTracker tracker;\r
+    \r
+    private List<GeometryProviderExtension> extensions = new ArrayList<GeometryProviderExtension>();\r
+    private Map<Resource,GeometryProvider> providers;\r
+    \r
+    private GeometryProviderRegistry() {\r
+        providers = new HashMap<Resource,GeometryProvider>();\r
+        \r
+        tracker = new ExtensionTracker();\r
+               \r
+               IExtensionPoint ep = Platform.getExtensionRegistry().getExtensionPoint(NAMESPACE,EP_NAME);\r
+               loadExtensions(ep.getConfigurationElements());\r
+               \r
+               IFilter filter = ExtensionTracker.createExtensionPointFilter(ep);\r
+               tracker.registerHandler(this, filter);\r
+    }\r
+    \r
+    private void close() {\r
+               tracker.close();\r
+               tracker = null;\r
+               extensions = new ArrayList<GeometryProviderExtension>();\r
+       }\r
+    \r
+    public static synchronized GeometryProviderRegistry getInstance() {\r
+        if (instance==null) instance = new GeometryProviderRegistry();\r
+        return instance;\r
+    }\r
+    \r
+    public static synchronized void dispose() {\r
+               if (instance != null) {\r
+                       instance.close();\r
+                       instance = null;\r
+               }       \r
+       }\r
+    \r
+    public synchronized List<GeometryProviderExtension> getExtensions() {\r
+               return Collections.unmodifiableList(extensions);\r
+       }\r
+    \r
+    private synchronized void loadExtensions(IConfigurationElement[] elements) {\r
+               for (IConfigurationElement el : elements) {\r
+                       String id = el.getAttribute("id");\r
+                       try {\r
+                               Object o = el.createExecutableExtension("class");\r
+                               GeometryProviderExtension ext = new GeometryProviderExtension(id,(GeometryProvider)o);\r
+                               tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);\r
+                               extensions.add(ext);\r
+                       } catch (CoreException e) {\r
+                               ErrorLogger.defaultLogError("Cannot create java interface for GeometryProvider " + id, e);\r
+                       }\r
+               }\r
+       }\r
+    \r
+    private Map<Resource,GeometryProvider> getProviderMap() {\r
+        return providers;\r
+    }\r
+    \r
+    public static Geometry[] getGeometry(IEntity thing, boolean transform) {\r
+        GeometryProvider provider = getGeometryProvider(thing);\r
+        return provider.getGeometryFromResource(thing, transform);\r
+    }\r
+    \r
+    public static GeometryProvider getGeometryProvider(IEntity thing) {\r
+       Collection<IEntity> types = thing.getRelatedObjects(thing.getGraph().getBuiltins().InstanceOf);\r
+        \r
+       //Resource types[] = OntologyUtils.getTypes(resource);\r
+       for (IEntity t : types) {\r
+               GeometryProvider provider = getInstance().getProviderMap().get(t.getResource());\r
+               if (provider == null) {\r
+                //for (Extension<GeometryProvider> e : getInstance().getExtensions()) {\r
+                       for (GeometryProviderExtension e : getInstance().getExtensions()) {\r
+                    if (e.provider.canHandle(thing)) {\r
+                        getInstance().getProviderMap().put(t.getResource(), e.provider);\r
+                        return e.provider;\r
+                    }\r
+                }\r
+                \r
+            } else {\r
+               return provider;\r
+            }\r
+       }\r
+       \r
+       throw new UnsupportedOperationException("Cannot handle resource " + thing);\r
+    }\r
+    \r
+    @Override\r
+    public void addExtension(IExtensionTracker tracker, IExtension extension) {\r
+        loadExtensions(extension.getConfigurationElements());\r
+    }\r
+    \r
+    @Override\r
+       public synchronized void removeExtension(IExtension extension, Object[] objects) {\r
+               for (Object o : objects) {\r
+                       GeometryProviderExtension ext = (GeometryProviderExtension) o;\r
+                       tracker.unregisterObject(extension, ext);\r
+                       extensions.remove(ext);\r
+               }\r
+       }\r
+    \r
+    public class GeometryProviderExtension {\r
+               public String id;\r
+               public GeometryProvider provider;\r
+               \r
+               public GeometryProviderExtension(String id, GeometryProvider provider) {\r
+                       this.id = id;\r
+                       this.provider = provider;\r
+               }\r
+       }\r
+}\r