| /******************************************************************************* |
| * Copyright (c) 2000, 2010 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 |
| *******************************************************************************/ |
| package org.eclipse.gef.util; |
| |
| /** |
| * A structure for storing multiple flags compactly using a 32-bit |
| * <code>int</code>. |
| * |
| * @author hudsonr |
| */ |
| public class FlagSupport { |
| |
| private int flags; |
| |
| /** |
| * Returns <code>true</code> the flag (or one of the flags) indicated by the |
| * given bitmask is set to true. |
| * |
| * @param flag |
| * the bitmask of a flag or flags |
| * @return <code>true</code> if one of the flags is true |
| */ |
| protected boolean getFlag(int flag) { |
| return (flags & flag) != 0; |
| } |
| |
| /** |
| * Sets the flag (or all of the flags) indicated by the given bitmask to the |
| * given value. |
| * |
| * @param flag |
| * the bitmask of the flag or flags |
| * @param value |
| * the new value |
| */ |
| protected void setFlag(int flag, boolean value) { |
| if (value) |
| flags |= flag; |
| else |
| flags &= ~flag; |
| } |
| |
| } |
