118ca7d014
* java/awt/font/TransformAttribute.java, (TransformAttribute(AffineTransform)): throw IllegalArgumentException for null transform. (getTransform): return a copy of transform. Added doc comments to all. From-SVN: r95408
101 lines
3.5 KiB
Java
101 lines
3.5 KiB
Java
/* TransformAttribute.java --
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Copyright (C) 2003, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt.font;
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import java.awt.geom.AffineTransform;
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import java.io.Serializable;
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/**
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* This class provides a mechanism for using an {@link AffineTransform} as
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* an <i>immutable</i> attribute (for example, in the
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* {@link java.text.AttributedString} class). Any transform passed to
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* this class is copied before being stored, and any transform handed out
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* by this class is a copy of the stored transform. In this way, it is
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* not possible to modify the stored transform.
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*
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* @author Michael Koch
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*/
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public final class TransformAttribute implements Serializable
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{
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private static final long serialVersionUID = 3356247357827709530L;
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private AffineTransform affineTransform;
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/**
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* Creates a new attribute that contains a copy of the given transform.
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*
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* @param transform the transform (<code>null</code> not permitted).
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*
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* @throws IllegalArgumentException if <code>transform</code> is
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* <code>null</code>.
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*/
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public TransformAttribute (AffineTransform transform)
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{
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if (transform == null)
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{
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throw new IllegalArgumentException("Null 'transform' not permitted.");
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}
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this.affineTransform = new AffineTransform (transform);
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}
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/**
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* Returns a copy of the transform contained by this attribute.
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*
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* @return A copy of the transform.
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*/
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public AffineTransform getTransform ()
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{
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return (AffineTransform) affineTransform.clone();
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}
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/**
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* Returns <code>true</code> if the transform contained by this attribute is
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* an identity transform, and <code>false</code> otherwise.
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*
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* @return <code>true</code> if the transform contained by this attribute is
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* an identity transform, and <code>false</code> otherwise.
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*
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* @since 1.4
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*/
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public boolean isIdentity ()
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{
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return (affineTransform == null ? false : affineTransform.isIdentity ());
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}
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}
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