--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.commands/src/org/eclipse/core/commands/IParameter.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,63 @@
+/*******************************************************************************
+ * Copyright (c) 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ ******************************************************************************/
+
+module org.eclipse.core.commands.IParameter;
+
+import org.eclipse.core.commands.IParameterValues;
+
+import java.lang.all;
+
+/**
+ * <p>
+ * A parameter for a command. A parameter identifies a type of information that
+ * the command might accept. For example, a "Show View" command might accept the
+ * id of a view for display. This parameter also identifies possible values, for
+ * display in the user interface.
+ * </p>
+ *
+ * @since 3.1
+ */
+public interface IParameter {
+
+    /**
+     * Returns the identifier for this parameter.
+     *
+     * @return The identifier; never <code>null</code>.
+     */
+    public String getId();
+
+    /**
+     * Returns the human-readable name for this parameter.
+     *
+     * @return The parameter name; never <code>null</code>.
+     */
+    public String getName();
+
+    /**
+     * Returns the values associated with this parameter.
+     *
+     * @return The values associated with this parameter. This must not be
+     *         <code>null</code>.
+     * @throws ParameterValuesException
+     *             If the values can't be retrieved for some reason.
+     */
+    public IParameterValues getValues();
+
+    /**
+     * Returns whether parameter is optional. Otherwise, it is required.
+     *
+     * @return <code>true</code> if the parameter is optional;
+     *         <code>false</code> if it is required.
+     */
+    public bool isOptional();
+}