1 files changed, 140 insertions, 0 deletions
diff --git a/plugins/infra/core/org.eclipse.papyrus.infra.core/src/org/eclipse/papyrus/infra/core/extension/diagrameditor/PluggableEditorFactoryReader.java b/plugins/infra/core/org.eclipse.papyrus.infra.core/src/org/eclipse/papyrus/infra/core/extension/diagrameditor/PluggableEditorFactoryReader.java
new file mode 100644
index 00000000000..f92ac0763e2
--- /dev/null
+++ b/plugins/infra/core/org.eclipse.papyrus.infra.core/src/org/eclipse/papyrus/infra/core/extension/diagrameditor/PluggableEditorFactoryReader.java
@@ -0,0 +1,140 @@
+/*****************************************************************************
+ * Copyright (c) 2008 CEA LIST.
+ *
+ *    
+ * 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:
+ *  Cedric Dumoulin  Cedric.dumoulin@lifl.fr - Initial API and implementation
+ *
+ *****************************************************************************/
+package org.eclipse.papyrus.infra.core.extension.diagrameditor;
+
+import static org.eclipse.papyrus.infra.core.Activator.log;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.papyrus.infra.core.editorsfactory.PageIconsRegistry;
+import org.eclipse.papyrus.infra.core.editorsfactory.PageModelFactoryRegistry;
+import org.eclipse.papyrus.infra.core.extension.ExtensionException;
+import org.eclipse.papyrus.infra.core.services.ServicesRegistry;
+
+/**
+ * This reader is used to read PluggableEditorFactory from the Eclipse extension
+ * declarations. It can be used to populate an {@link PageModelFactoryRegistry}.
+ */
+public class PluggableEditorFactoryReader {
+
+	/** list of editor descriptors */
+	protected List<EditorDescriptor> editorDescriptors;
+
+	/** ID of the editor extension (schema filename) */
+	public static final String EDITOR_EXTENSION_ID = "papyrusDiagram";
+
+	/** Namespace where to look for the extension points. */
+	protected String extensionPointNamespace;
+
+	/** indicates if extension is loaded or not */
+	private boolean isExtensionLoaded = false;
+
+	/**
+	 * Create a new Registry reading extension from the specified namespace. The
+	 * namespace is usually the name of the plugin owning the registry.
+	 * 
+	 * @param extensionPointNamespace
+	 */
+	public PluggableEditorFactoryReader(String extensionPointNamespace) {
+		super();
+		this.extensionPointNamespace = extensionPointNamespace;
+		editorDescriptors = new ArrayList<EditorDescriptor>();
+	}
+
+	/**
+	 * Populate the provided {@link PageModelFactoryRegistry} with {@link IPluggableEditorFactory} read from Eclipse extension declarations.
+	 * For each declared editor, create a proxy encapsulating the real
+	 * EditorFactory. Then the proxy is added to the PageModelFactoryRegistry.
+	 * 
+	 * @param pageModelFactoryRegistry
+	 *        The object to populate
+	 * @param serviceRegistry
+	 *        ServiceRegistry provided to newly instantiated {@link IPluggableEditorFactory}.
+	 */
+	public void populate(PageModelFactoryRegistry pageModelFactoryRegistry, ServicesRegistry serviceRegistry) {
+
+		for(EditorDescriptor desc : getEditorDescriptors()) {
+
+			// Create and add a proxy encapsulating the EditorFactory.
+			pageModelFactoryRegistry.add(new EditorFactoryProxy(serviceRegistry, desc));
+		}
+	}
+
+	/**
+	 * Populate the provided {@link PageIconsRegistry} with icons read from
+	 * Eclipse extension declarations. For each declared editor, create a {@link EditorIconFactory}.
+	 * 
+	 * @param pageModelFactoryRegistry
+	 *        The object to populate
+	 * @param serviceRegistry
+	 *        ServiceRegistry provided to newly instantiated {@link IPluggableEditorFactory}.
+	 */
+	public void populate(PageIconsRegistry registry) {
+
+		for(EditorDescriptor desc : getEditorDescriptors()) {
+
+			// Create and add a proxy encapsulating the EditorFactory.
+			registry.add(new EditorIconFactory(desc));
+		}
+	}
+
+	/**
+	 * Get the list of editor descriptor.
+	 * 
+	 * @return the list of editor descriptor.
+	 */
+	public List<EditorDescriptor> getEditorDescriptors() {
+		if(!isExtensionLoaded) {
+			isExtensionLoaded = true;
+			initializeEditorDescriptors();
+		}
+		return editorDescriptors;
+	}
+
+	/**
+	 * Read editor descriptors from extension points.
+	 */
+	private void initializeEditorDescriptors() {
+		// Reading data from plugins
+		IConfigurationElement[] configElements = Platform.getExtensionRegistry().getConfigurationElementsFor(extensionPointNamespace, EDITOR_EXTENSION_ID);
+
+		for(IConfigurationElement ele : configElements) {
+			EditorDescriptor desc;
+			try {
+				if(EditorDescriptorExtensionFactory.EDITOR_DIAGRAM_EXTENSIONPOINT.equals(ele.getName())) {
+					desc = EditorDescriptorExtensionFactory.eINSTANCE.createNestedEditorDescriptor(ele);
+					editorDescriptors.add(desc);
+				}
+			} catch (ExtensionException e) {
+				log.error("Initialization editor problem ", e);
+			}
+		}
+
+		if(log.isDebugEnabled()) {
+			log.debug("Read " + editorDescriptors.size() + " editor descriptors from Eclipse extensions");
+		}
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public String toString() {
+		return "EditorFactoryRegistry: " + editorDescriptors.toString();
+	}
+
+}