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jeremybenn |
/* GraphicsConfigTemplate.java -- a template for selecting configurations
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Copyright (C) 2002, 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., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 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;
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import java.io.Serializable;
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/**
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* This allows filtering an array of GraphicsConfigurations for the best
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* one based on various requirements. The resulting configuration has had
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* all non-default attributes set as required to meet or exceed the request.
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*
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* @author Eric Blake (ebb9@email.byu.edu)
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* @see GraphicsConfiguration
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* @see GraphicsDevice
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* @since 1.2
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* @status updated to 1.4
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*/
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public abstract class GraphicsConfigTemplate implements Serializable
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{
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/**
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* Compatible with JDK 1.2+.
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*/
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private static final long serialVersionUID = -8061369279557787079L;
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/** States that a feature is required to select a configuration. */
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public static final int REQUIRED = 1;
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/**
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* States that a feature is preferred, but not required, to select a
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* configuration. In the case of multiple valid configurations, the tie
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* breaks in favor of the one with the feature.
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*/
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public static final int PREFERRED = 2;
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/**
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* States that a feature is not necessary in the configuration. In the case
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* of multiple valid configurations, the tie breaks in favor of the one
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* without the feature, to reduce overhead.
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*/
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public static final int UNNECESSARY = 3;
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/**
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* The default constructor.
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*/
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public GraphicsConfigTemplate()
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{
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}
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/**
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* Returns the "best" match among the array of possible configurations, given
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* the criteria of this template.
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*
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* @param array the array to choose from
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* @return the best match
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* @throws NullPointerException if array is null
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*/
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public abstract GraphicsConfiguration getBestConfiguration
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(GraphicsConfiguration[] array);
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/**
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* Returns true if the given configuration supports all the features required
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* by this template.
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*
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* @param config the configuration to test
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* @return true if it is a match
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* @throws NullPointerException if config is null
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*/
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public abstract boolean isGraphicsConfigSupported
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(GraphicsConfiguration config);
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} // class GraphicsConfigTemplate
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