--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/IOperationApprover2.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,80 @@
+/*******************************************************************************
+ * Copyright (c) 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 org.eclipse.core.commands.operations.IOperationApprover2;
+
+import org.eclipse.core.runtime.IAdaptable;
+import org.eclipse.core.runtime.IStatus;
+
+import org.eclipse.core.commands.operations.IOperationApprover;
+import org.eclipse.core.commands.operations.IUndoableOperation;
+import org.eclipse.core.commands.operations.IOperationHistory;
+
+import java.lang.all;
+
+/**
+ * Extends {@link IOperationApprover} to approve the execution of a particular
+ * operation within an operation history. Operations that are candidates for
+ * execution have already been validated against their current state and
+ * according to the rules of the history. Prior to 3.2, an operation approver
+ * was only consulted for undo and redo of an operation, not its initial
+ * execution.
+ * <p>
+ * By the time an IOperationApprover2 is consulted, the execution has already
+ * been requested and it has been determined that the operation is valid.
+ * Approvers should return an <code>IStatus</code> object with severity
+ * <code>OK</code> if the operation should proceed, and any other severity if
+ * it should not. When an operation is not approved, it is expected that the
+ * object not allowing the operation has already consulted the user if necessary
+ * or otherwise provided any necessary information to the user about the fact
+ * that the operation is not approved.
+ * </p>
+ * <p>
+ * Like {@link IOperationApprover}, implementers of this extension must be
+ * prepared to receive the approval messages from a background thread. Any UI
+ * access occurring inside the implementation must be properly synchronized
+ * using the techniques specified by the client's widget library.
+ * </p>
+ *
+ * @since 3.2
+ */
+public interface IOperationApprover2 : IOperationApprover {
+    /**
+     * Return a status indicating whether the specified operation should be
+     * executed. Any status that does not have severity <code>IStatus.OK</code>
+     * will not be approved. Implementers should not assume that the execution
+     * will be performed when the status is <code>OK</code>, since other
+     * operation approvers may veto the execution.
+     *
+     * @param operation
+     *            the operation to be executed
+     * @param history
+     *            the history performing the execution of the operation
+     * @param info
+     *            the IAdaptable (or <code>null</code>) provided by the
+     *            caller in order to supply UI information for prompting the
+     *            user if necessary. When this parameter is not
+     *            <code>null</code>, it should minimally contain an adapter
+     *            for the org.eclipse.swt.widgets.Shell.class. Even if UI
+     *            information is provided, the implementation of this method
+     *            must be prepared for being called from a background thread.
+     *            Any UI access must be properly synchronized using the
+     *            techniques specified by the client's widget library.
+     * @return the IStatus describing whether the operation is approved. The
+     *         execution will not proceed if the status severity is not
+     *         <code>OK</code>, and the caller requesting the execution will
+     *         be returned the status that caused the rejection. Any other
+     *         status severities will not be interpreted by the history.
+     */
+    IStatus proceedExecuting(IUndoableOperation operation,
+            IOperationHistory history, IAdaptable info);
+}