jobkoctets.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

/*
 * @(#)JobKOctets.java	1.9 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 javax.print.attribute.Attribute;
import javax.print.attribute.IntegerSyntax;
import javax.print.attribute.PrintRequestAttribute;
import javax.print.attribute.PrintJobAttribute;

/**
 * Class JobKOctets is an integer valued printing attribute class that specifies 
 * the total size of the document(s) in K octets, i.e., in units of 1024 octets 
 * requested to be processed in the job. The value must be rounded up, so that a 
 * job between 1 and 1024 octets must be indicated as being 1K octets, 1025 to 
 * 2048 must be 2K octets, etc. For a multidoc print job (a job with multiple 
 * documents), the JobKOctets value is computed by adding up the individual 
 * documents' sizes in octets, then rounding up to the next K octets value. 
 * <P>
 * The JobKOctets attribute describes the size of the job. This attribute is not 
 * intended to be a counter; it is intended to be useful routing and scheduling 
 * information if known. The printer may try to compute the JobKOctets 
 * attribute's value if it is not supplied in the Print Request. Even if the 
 * client does supply a value for the JobKOctets attribute in the Print Request, 
 * the printer may choose to change the value if the printer is able to compute 
 * a value which is more accurate than the client supplied value. The printer 
 * may be able to determine the correct value for the JobKOctets attribute 
 * either right at job submission time or at any later point in time. 
 * <P>
 * The JobKOctets value must not include the multiplicative factors contributed 
 * by the number of copies specified by the {@link Copies Copies} attribute, 
 * independent of whether the device can process multiple copies without making 
 * multiple passes over the job or document data and independent of whether the 
 * output is collated or not. Thus the value is independent of the 
 * implementation and indicates the size of the document(s) measured in K octets 
 * independent of the number of copies. 
 * <P>
 * The JobKOctets value must also not include the multiplicative factor due to a 
 * copies instruction embedded in the document data. If the document data 
 * actually includes replications of the document data, this value will include 
 * such replication. In other words, this value is always the size of the source 
 * document data, rather than a measure of the hardcopy output to be produced. 
 * <P>
 * The size of a doc is computed based on the print data representation class as 
 * specified by the doc's {@link javax.print.DocFlavor DocFlavor}, as 
 * shown in the table below. 
 * <P>
 * <TABLE BORDER=1 CELLPADDING=2 CELLSPACING=1 SUMMARY="Table showing computation of doc sizes">
 * <TR BGCOLOR="#E5E5E5">
 * <TH>Representation Class</TH>
 * <TH>Document Size</TH>
 * </TR>
 * <TR>
 * <TD>byte[]</TD>
 * <TD>Length of the byte array</TD>
 * </TR>
 * <TR>
 * <TD>java.io.InputStream</TD>
 * <TD>Number of bytes read from the stream</TD>
 * </TR>
 * <TR>
 * <TD>char[]</TD>
 * <TD>Length of the character array x 2</TD>
 * </TR>
 * <TR>
 * <TD>java.lang.String</TD>
 * <TD>Length of the string x 2</TD>
 * </TR>
 * <TR>
 * <TD>java.io.Reader</TD>
 * <TD>Number of characters read from the stream x 2</TD>
 * </TR>
 * <TR>
 * <TD>java.net.URL</TD>
 * <TD>Number of bytes read from the file at the given URL address</TD>
 * </TR>
 * <TR>
 * <TD>java.awt.image.renderable.RenderableImage</TD>
 * <TD>Implementation dependent&#42;</TD>
 * </TR>
 * <TR>
 * <TD>java.awt.print.Printable</TD>
 * <TD>Implementation dependent&#42;</TD>
 * </TR>
 * <TR>
 * <TD>java.awt.print.Pageable</TD>
 * <TD>Implementation dependent&#42;</TD>
 * </TR>
 * </TABLE> 
 * <P>
 * &#42; In these cases the Print Service itself generates the print data sent 
 * to the printer. If the Print Service supports the JobKOctets attribute, for 
 * these cases the Print Service itself must calculate the size of the print 
 * data, replacing any JobKOctets value the client specified. 
 * <P>
 * <B>IPP Compatibility:</B> The integer value gives the IPP integer value. The 
 * category name returned by <CODE>getName()</CODE> gives the IPP attribute 
 * name. 
 * <P>
 *
 * @see JobKOctetsSupported
 * @see JobKOctetsProcessed
 * @see JobImpressions
 * @see JobMediaSheets
 *
 * @author  Alan Kaminsky
 */
public final class JobKOctets	extends IntegerSyntax
	implements PrintRequestAttribute, PrintJobAttribute {

    private static final long serialVersionUID = -8959710146498202869L;

    /**
     * Construct a new job K octets attribute with the given integer value. 
     *
     * @param  value  Integer value.
     *
     * @exception  IllegalArgumentException
     *  (Unchecked exception) Thrown if <CODE>value</CODE> is less than 0.
     */
    public JobKOctets(int value) {
	super (value, 0, Integer.MAX_VALUE);
    }

    /**
     * Returns whether this job K octets 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 JobKOctets.
     * <LI>
     * This job K octets attribute's value and <CODE>object</CODE>'s value 
     * are equal. 
     * </OL>
     *
     * @param  object  Object to compare to.
     *
     * @return  True if <CODE>object</CODE> is equivalent to this job K
     *          octets attribute, false otherwise. 
     */
    public boolean equals(Object object) {
	return super.equals(object) && object instanceof JobKOctets;
    }

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

}