| /* TransformAttribute.java -- |
| Copyright (C) 2003, 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package java.awt.font; |
| |
| import java.awt.geom.AffineTransform; |
| import java.io.Serializable; |
| |
| /** |
| * This class provides a mechanism for using an {@link AffineTransform} as |
| * an <i>immutable</i> attribute (for example, in the |
| * {@link java.text.AttributedString} class). Any transform passed to |
| * this class is copied before being stored, and any transform handed out |
| * by this class is a copy of the stored transform. In this way, it is |
| * not possible to modify the stored transform. |
| * |
| * @author Michael Koch |
| */ |
| public final class TransformAttribute implements Serializable |
| { |
| private static final long serialVersionUID = 3356247357827709530L; |
| |
| private AffineTransform affineTransform; |
| |
| /** |
| * Creates a new attribute that contains a copy of the given transform. |
| * |
| * @param transform the transform (<code>null</code> not permitted). |
| * |
| * @throws IllegalArgumentException if <code>transform</code> is |
| * <code>null</code>. |
| */ |
| public TransformAttribute (AffineTransform transform) |
| { |
| if (transform == null) |
| { |
| throw new IllegalArgumentException("Null 'transform' not permitted."); |
| } |
| this.affineTransform = new AffineTransform (transform); |
| } |
| |
| /** |
| * Returns a copy of the transform contained by this attribute. |
| * |
| * @return A copy of the transform. |
| */ |
| public AffineTransform getTransform () |
| { |
| return (AffineTransform) affineTransform.clone(); |
| } |
| |
| /** |
| * Returns <code>true</code> if the transform contained by this attribute is |
| * an identity transform, and <code>false</code> otherwise. |
| * |
| * @return <code>true</code> if the transform contained by this attribute is |
| * an identity transform, and <code>false</code> otherwise. |
| * |
| * @since 1.4 |
| */ |
| public boolean isIdentity () |
| { |
| return (affineTransform == null ? false : affineTransform.isIdentity ()); |
| } |
| } |