/*

 * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package javax.print.event;

import javax.print.PrintService;

import javax.print.attribute.AttributeSetUtilities;

import javax.print.attribute.PrintServiceAttributeSet;

/**

 * Class {@code PrintServiceAttributeEvent} encapsulates an event a Print

 * Service instance reports to let the client know of changes in the print

 * service state.

 */

public class PrintServiceAttributeEvent extends PrintEvent {

    /**

     * Use serialVersionUID from JDK 1.4 for interoperability.

     */

    private static final long serialVersionUID = -7565987018140326600L;

    /**

     * The printing service attributes that changed.

     */

    private PrintServiceAttributeSet attributes;

    /**

     * Constructs a {@code PrintServiceAttributeEvent} object.

     *

     * @param  source the print job generating this event

     * @param  attributes the attribute changes being reported

     * @throws IllegalArgumentException if {@code source} is {@code null}

     */

    public PrintServiceAttributeEvent(PrintService source,

                                      PrintServiceAttributeSet attributes) {

        super(source);

        this.attributes = AttributeSetUtilities.unmodifiableView(attributes);

    }

    /**

     * Returns the print service.

     *

     * @return {@code PrintService} object

     */

    public PrintService getPrintService() {

        return (PrintService) getSource();

    }

    /**

     * Determine the printing service attributes that changed and their new

     * values.

     *

     * @return attributes containing the new values for the service attributes

     *         that changed. The returned set may be unmodifiable.

     */

    public PrintServiceAttributeSet getAttributes() {

        return attributes;

    }

}