--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/action/AbstractGroupMarker.d	Tue Apr 01 08:00:31 2008 +0200
@@ -0,0 +1,62 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.action.AbstractGroupMarker;
+
+import dwtx.jface.action.ContributionItem;
+
+import dwtx.core.runtime.Assert;
+
+import dwt.dwthelper.utils;
+
+/**
+ * Abstract superclass for group marker classes.
+ * <p>
+ * This class is not intended to be subclassed outside the framework.
+ * </p>
+ */
+public abstract class AbstractGroupMarker : ContributionItem {
+    /**
+     * Constructor for use by subclasses.
+     */
+    protected this() {
+    }
+
+    /**
+     * Create a new group marker with the given name.
+     * The group name must not be <code>null</code> or the empty string.
+     * The group name is also used as the item id.
+     *
+     * @param groupName the name of the group
+     */
+    protected this(String groupName) {
+        super(groupName);
+        Assert.isTrue(groupName !is null && groupName.length > 0);
+    }
+
+    /**
+     * Returns the group name.
+     *
+     * @return the group name
+     */
+    public String getGroupName() {
+        return getId();
+    }
+
+    /**
+     * The <code>AbstractGroupMarker</code> implementation of this <code>IContributionItem</code>
+     * method returns <code>true</code> iff the id is not <code>null</code>. Subclasses may override.
+     */
+    public bool isGroupMarker() {
+        return getId() !is null;
+    }
+}