X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.browsing.ui.common%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fcommon%2Fextension%2FEvaluatorBindingExtensionManager.java;fp=bundles%2Forg.simantics.browsing.ui.common%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fcommon%2Fextension%2FEvaluatorBindingExtensionManager.java;h=93e6d66e9d4b76799fd0fc7b9edaa74f212a79bc;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/extension/EvaluatorBindingExtensionManager.java b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/extension/EvaluatorBindingExtensionManager.java
new file mode 100644
index 000000000..93e6d66e9
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/extension/EvaluatorBindingExtensionManager.java
@@ -0,0 +1,182 @@
+/*******************************************************************************
+ * 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.browsing.ui.common.extension;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IExtension;
+import org.eclipse.core.runtime.IExtensionPoint;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;
+import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;
+import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;
+import org.eclipse.core.runtime.dynamichelpers.IFilter;
+import org.simantics.browsing.ui.common.Activator;
+import org.simantics.browsing.ui.common.extension.internal.EvaluatorBindingExtension;
+import org.simantics.browsing.ui.common.extension.internal.EvaluatorImplementationBinding;
+import org.simantics.browsing.ui.common.extension.internal.EvaluatorReferenceBinding;
+import org.simantics.utils.strings.StringUtils;
+
+/**
+ * @author Tuukka Lehtonen
+ */
+public class EvaluatorBindingExtensionManager implements IExtensionChangeHandler {
+
+    private final static String                NAMESPACE    = Activator.PLUGIN_ID;
+
+    private final static String                EP_NAME      = "evaluatorBinding";
+
+    private ExtensionTracker                   tracker;
+
+    private EvaluatorBindingExtension[]            extensions   = new EvaluatorBindingExtension[0];
+
+    private static EvaluatorBindingExtensionManager INSTANCE;
+
+
+    public static synchronized EvaluatorBindingExtensionManager getInstance() {
+        if (INSTANCE == null)
+            INSTANCE = new EvaluatorBindingExtensionManager();
+        return INSTANCE;
+    }
+
+    public static synchronized void dispose() {
+        if (INSTANCE != null) {
+            INSTANCE.close();
+            INSTANCE = null;
+        }
+    }
+
+
+    private EvaluatorBindingExtensionManager() {
+        tracker = new ExtensionTracker();
+
+        // Cache defined actions
+        IExtensionPoint expt = Platform.getExtensionRegistry().getExtensionPoint(NAMESPACE, EP_NAME);
+        loadExtensions(expt.getConfigurationElements());
+
+        // Start tracking for new and removed extensions
+        IFilter filter = ExtensionTracker.createExtensionPointFilter(expt);
+        tracker.registerHandler(this, filter);
+    }
+
+    private void close() {
+        tracker.close();
+        tracker = null;
+        extensions = new EvaluatorBindingExtension[0];
+    }
+
+    public EvaluatorBindingExtension[] getExtensions() {
+        return extensions;
+    }
+
+    private void loadExtensions(IConfigurationElement[] elements) {
+
+        Set<EvaluatorBindingExtension> newExtensions = new HashSet<EvaluatorBindingExtension>(Arrays.asList(extensions));
+
+        for (IConfigurationElement el : elements) {
+
+            String browseContext = StringUtils.safeString(el.getAttribute("browseContext"));
+
+            for(IConfigurationElement child : el.getChildren("reference")) {
+
+                String factoryId = StringUtils.safeString(child.getAttribute("id"));
+                EvaluatorBindingExtension ext = new EvaluatorReferenceBinding(browseContext, factoryId);
+
+                // Start tracking the new extension object, its removal will be notified of
+                // with removeExtension(extension, Object[]).
+                tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);
+
+                newExtensions.add(ext);
+
+            }
+
+            for(IConfigurationElement child : el.getChildren("implementation")) {
+
+                try {
+
+                    EvaluatorFactory factory = (EvaluatorFactory)child.createExecutableExtension("class");
+                    EvaluatorBindingExtension ext = new EvaluatorImplementationBinding(browseContext, factory);
+
+                    // Start tracking the new extension object, its removal will be notified of
+                    // with removeExtension(extension, Object[]).
+                    tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);
+
+                    newExtensions.add(ext);
+
+                } catch (CoreException e) {
+
+                    System.out.println(" == Could not load ViewpointContributionFactory '" + child.getAttribute("class") + "' due to the following error: " + e.getMessage()  );
+
+                }
+
+            }
+
+        }
+
+        // Atomic assignment
+        this.extensions = newExtensions.toArray(new EvaluatorBindingExtension[newExtensions.size()]);
+    }
+
+    @Override
+    public void addExtension(IExtensionTracker tracker, IExtension extension) {
+        loadExtensions(extension.getConfigurationElements());
+    }
+
+    @Override
+    public void removeExtension(IExtension extension, Object[] objects) {
+        Set<EvaluatorBindingExtension> newExtensions = new HashSet<EvaluatorBindingExtension>(Arrays.asList(extensions));
+
+        for (Object o : objects) {
+            tracker.unregisterObject(extension, o);
+            newExtensions.remove(o);
+        }
+
+        // Atomic assignment
+        this.extensions = newExtensions.toArray(new EvaluatorBindingExtension[newExtensions.size()]);
+    }
+
+    public Collection<EvaluatorFactory> getBoundFactories(Set<String> browseContexts) {
+
+//        ArrayList<EvaluatorFactory> result = new ArrayList<EvaluatorFactory>();
+//        for(EvaluatorBindingExtension binding : getExtensions()) {
+//            if(browseContexts.contains(binding.browserId())) {
+//                EvaluatorFactory factory = EvaluatorFactoryExtensionManager.getFactory(binding.factoryId());
+//                result.add(factory);
+//            }
+//        }
+//        return result;
+
+        HashSet<EvaluatorFactory> result = new HashSet<EvaluatorFactory>();
+
+        for(EvaluatorBindingExtension binding : getExtensions()) {
+            if(browseContexts.contains(binding.getBrowseContext())) {
+                EvaluatorFactory factory = binding.getFactory();
+                if(factory != null) {
+//                    System.out.println("----------- Plugin contribution " + binding.getFactory());
+                    result.add(factory);
+                } else {
+//                    System.out.println("FAILED: ----------- No factory for " + binding);
+                }
+
+            }
+        }
+
+        return result;
+
+    }
+
+}