1 files changed, 126 insertions, 0 deletions
diff --git a/core/bundles/org.eclipse.wst.sse.core/src/org/eclipse/wst/sse/core/internal/modelhandler/PluginContributedFactoryReader.java b/core/bundles/org.eclipse.wst.sse.core/src/org/eclipse/wst/sse/core/internal/modelhandler/PluginContributedFactoryReader.java
new file mode 100644
index 0000000000..7d2e2dd23a
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+++ b/core/bundles/org.eclipse.wst.sse.core/src/org/eclipse/wst/sse/core/internal/modelhandler/PluginContributedFactoryReader.java
@@ -0,0 +1,126 @@
+/*******************************************************************************
+ * Copyright (c) 2001, 2005 IBM Corporation and others.
+ * 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:
+ *     IBM Corporation - initial API and implementation
+ *     Jens Lukowski/Innoopract - initial renaming/restructuring
+ *     
+ *******************************************************************************/
+package org.eclipse.wst.sse.core.internal.modelhandler;
+
+import java.util.List;
+import java.util.Vector;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IExtensionPoint;
+import org.eclipse.core.runtime.IExtensionRegistry;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.wst.sse.core.internal.SSECorePlugin;
+import org.eclipse.wst.sse.core.internal.ltk.modelhandler.IDocumentTypeHandler;
+import org.eclipse.wst.sse.core.internal.provisional.INodeAdapterFactory;
+
+
+/**
+ * 
+ * Clients can make use of IExecutableExtension to handle the optional adapter
+ * class and key. Typically, many clients use a typical pattern of providing
+ * an adapter class and key in their null argument constructor anyway, so
+ * they'd only have to use IExecutableExtension if the factory was for more
+ * than one.
+ */
+public class PluginContributedFactoryReader {
+	//	protected final String ATTR_ADAPTERKEY = "adapterKeyClass";
+	// //$NON-NLS-1$
+	//	protected final String ATTR_REGISTERADAPTER = "registerAdapters";
+	// //$NON-NLS-1$
+	private static PluginContributedFactoryReader reader = null;
+
+	public synchronized static PluginContributedFactoryReader getInstance() {
+		if (reader == null) {
+			reader = new PluginContributedFactoryReader();
+		}
+		return reader;
+	}
+
+	protected final String ATTR_CLASS = "class"; //$NON-NLS-1$
+	protected final String ATTR_CONTENTTYPE = "contentTypeIdentiferId"; //$NON-NLS-1$
+
+	protected final String EXTENSION_POINT_ID = "contentTypeFactoryContribution"; //$NON-NLS-1$
+	protected final String TAG_NAME = "factory"; //$NON-NLS-1$
+
+	protected PluginContributedFactoryReader() {
+		super();
+	}
+
+	public List getFactories(IDocumentTypeHandler handler) {
+		return loadRegistry(handler.getId());
+	}
+
+	public List getFactories(String type) {
+		return loadRegistry(type);
+	}
+
+	protected INodeAdapterFactory loadFactoryFromConfigurationElement(IConfigurationElement element, Object requesterType) {
+		INodeAdapterFactory factory = null;
+		if (element.getName().equals(TAG_NAME)) {
+			String contentType = element.getAttribute(ATTR_CONTENTTYPE);
+			if (!requesterType.equals(contentType))
+				return null;
+			String className = element.getAttribute(ATTR_CLASS);
+			//			String adapterKeyClass = element.getAttribute(ATTR_ADAPTERKEY);
+			//			String registerAdapters =
+			// element.getAttribute(ATTR_REGISTERADAPTER);
+
+			// if className is null, then no one defined the extension point
+			// for adapter factories
+			if (className != null) {
+				try {
+					factory = (INodeAdapterFactory) element.createExecutableExtension(ATTR_CLASS);
+				} catch (CoreException e) {
+					// if an error occurs here, its probably that the plugin
+					// could not be found/loaded
+					org.eclipse.wst.sse.core.internal.Logger.logException("Could not find class: " + className, e); //$NON-NLS-1$
+				} catch (Exception e) {
+					// if an error occurs here, its probably that the plugin
+					// could not be found/loaded -- but in any case we just
+					// want
+					// to log the error and continue running and best we can.
+					org.eclipse.wst.sse.core.internal.Logger.logException("Could not find class: " + className, e); //$NON-NLS-1$
+				}
+				//				if (plugin != null) {
+				//					factory = oldAttributesCode(element, factory, className,
+				// plugin);
+				//
+			}
+		}
+
+		return factory;
+	}
+
+	protected List loadRegistry(Object contentType) {
+		List factoryList = null; // new Vector();
+		IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
+		IExtensionPoint point = extensionRegistry.getExtensionPoint(SSECorePlugin.ID, EXTENSION_POINT_ID);
+		if (point != null) {
+			IConfigurationElement[] elements = point.getConfigurationElements();
+			if (elements.length > 0) {
+				// this is called a lot, so don't create vector unless really
+				// needed
+				// TODO: could eventually cache in a hashtable, or something,
+				// to avoid repeat processing
+				factoryList = new Vector();
+				for (int i = 0; i < elements.length; i++) {
+					INodeAdapterFactory factory = loadFactoryFromConfigurationElement(elements[i], contentType);
+					if (factory != null)
+						factoryList.add(factory);
+				}
+			}
+		}
+		return factoryList;
+	}
+}