printermessagefromoperator.java

java1.6众多例子参考

/*
 * @(#)PrinterMessageFromOperator.java	1.10 05/11/17
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package javax.print.attribute.standard;

import java.util.Locale;

import javax.print.attribute.Attribute;
import javax.print.attribute.TextSyntax;
import javax.print.attribute.PrintServiceAttribute;

/**
 * Class PrinterMessageFromOperator is a printing attribute class, a text 
 * attribute, that provides a message from an operator, system administrator,
 * or "intelligent" process to indicate to the end user information about or
 * status of the printer, such as why it is unavailable or when it is
 * expected to be available. 
 * <P>
 * A Print Service's attribute set includes zero instances or one instance of
 * a 
 * PrinterMessageFromOperator attribute, not more than one instance. A new 
 * PrinterMessageFromOperator attribute replaces an existing 
 * PrinterMessageFromOperator attribute, if any. In other words, 
 * PrinterMessageFromOperator is not intended to be a history log.
 * If it wishes, the client can detect changes to a Print Service's
 * PrinterMessageFromOperator 
 * attribute and maintain the client's own history log of the 
 * PrinterMessageFromOperator attribute values. 
 * <P>
 * <B>IPP Compatibility:</B> The string value gives the IPP name value. The 
 * locale gives the IPP natural language. The category name returned by 
 * <CODE>getName()</CODE> gives the IPP attribute name. 
 * <P>
 *
 * @author  Alan Kaminsky
 */
public final class PrinterMessageFromOperator	extends TextSyntax
    implements PrintServiceAttribute {

    static final long serialVersionUID = -4486871203218629318L;

    /**
     * Constructs a new printer message from operator attribute with the
     * given message and locale. 
     *
     * @param  message  Message.
     * @param  locale   Natural language of the text string. null
     * is interpreted to mean the default locale as returned
     * by <code>Locale.getDefault()</code>
     *
     * @exception  NullPointerException
     *     (unchecked exception) Thrown if <CODE>message</CODE> is null. 
     */
    public PrinterMessageFromOperator(String message, Locale locale) {
	super (message, locale);
    }

    /**
     * Returns whether this printer message from operator attribute is 
     * equivalent to the passed in object. To be equivalent, all of the 
     * following conditions must be true: 
     * <OL TYPE=1>
     * <LI>
     * <CODE>object</CODE> is not null.
     * <LI>
     * <CODE>object</CODE> is an instance of class 
     * PrinterMessageFromOperator. 
     * <LI>
     * This printer message from operator attribute's underlying string and 
     * <CODE>object</CODE>'s underlying string are equal. 
     * <LI>
     * This printer message from operator attribute's locale and 
     * <CODE>object</CODE>'s locale are equal. 
     * </OL>
     *
     * @param  object  Object to compare to.
     *
     * @return  True if <CODE>object</CODE> is equivalent to this printer 
     *          message from operator attribute, false otherwise. 
     */
    public boolean equals(Object object) {
	return (super.equals(object) &&
		object instanceof PrinterMessageFromOperator);
    }

    /**
     * Get the printing attribute class which is to be used as the "category" 
     * for this printing attribute value.
     * <P>
     * For class PrinterMessageFromOperator, 
     * the category is class PrinterMessageFromOperator itself. 
     *
     * @return  Printing attribute class (category), an instance of class
     *          {@link java.lang.Class java.lang.Class}.
     */
    public final Class<? extends Attribute> getCategory() {
	return PrinterMessageFromOperator.class;
    }

    /**
     * Get the name of the category of which this attribute value is an 
     * instance. 
     * <P>
     * For class PrinterMessageFromOperator, 
     * the category name is <CODE>"printer-message-from-operator"</CODE>. 
     *
     * @return  Attribute category name.
     */
    public final String getName() {
	return "printer-message-from-operator";
    }

}