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/* * @(#)JobHoldUntil.java 1.8 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.Date; import javax.print.attribute.Attribute; import javax.print.attribute.DateTimeSyntax; import javax.print.attribute.PrintRequestAttribute; import javax.print.attribute.PrintJobAttribute; /** * Class JobHoldUntil is a printing attribute class, a date-time attribute, that * specifies the exact date and time at which the job must become a candidate * for printing. * <P> * If the value of this attribute specifies a date-time that is in the future, * the printer should add the {@link JobStateReason JobStateReason} value of * JOB_HOLD_UNTIL_SPECIFIED to the job's {@link JobStateReasons JobStateReasons} * attribute, must move the job to the PENDING_HELD state, and must not schedule * the job for printing until the specified date-time arrives. * <P> * When the specified date-time arrives, the printer must remove the {@link * JobStateReason JobStateReason} value of JOB_HOLD_UNTIL_SPECIFIED from the * job's {@link JobStateReasons JobStateReasons} attribute, if present. If there * are no other job state reasons that keep the job in the PENDING_HELD state, * the printer must consider the job as a candidate for processing by moving the * job to the PENDING state. * <P> * If the specified date-time has already passed, the job must be a candidate * for processing immediately. Thus, one way to make the job immediately become * a candidate for processing is to specify a JobHoldUntil attribute constructed * like this (denoting a date-time of January 1, 1970, 00:00:00 GMT): * <PRE> * JobHoldUntil immediately = new JobHoldUntil (new Date (0L)); * </PRE> * <P> * If the client does not supply this attribute in a Print Request and the * printer supports this attribute, the printer must use its * (implementation-dependent) default JobHoldUntil value at job submission time * (unlike most job template attributes that are used if necessary at job * processing time). * <P> * To construct a JobHoldUntil attribute from separate values of the year, * month, day, hour, minute, and so on, use a {@link java.util.Calendar * Calendar} object to construct a {@link java.util.Date Date} object, then use * the {@link java.util.Date Date} object to construct the JobHoldUntil * attribute. To convert a JobHoldUntil attribute to separate values of the * year, month, day, hour, minute, and so on, create a {@link java.util.Calendar * Calendar} object and set it to the {@link java.util.Date Date} from the * JobHoldUntil attribute. * <P> * <B>IPP Compatibility:</B> Although IPP supports a "job-hold-until" attribute * specified as a keyword, IPP does not at this time support a "job-hold-until" * attribute specified as a date and time. However, the date and time can be * converted to one of the standard IPP keywords with some loss of precision; * for example, a JobHoldUntil value with today's date and 9:00pm local time * might be converted to the standard IPP keyword "night". The category name * returned by <CODE>getName()</CODE> gives the IPP attribute name. * <P> * * @author Alan Kaminsky */ public final class JobHoldUntil extends DateTimeSyntax implements PrintRequestAttribute, PrintJobAttribute { private static final long serialVersionUID = -1664471048860415024L; /** * Construct a new job hold until date-time attribute with the given * {@link java.util.Date Date} value. * * @param dateTime {@link java.util.Date Date} value. * * @exception NullPointerException * (unchecked exception) Thrown if <CODE>dateTime</CODE> is null. */ public JobHoldUntil(Date dateTime) { super (dateTime); } /** * Returns whether this job hold until 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 JobHoldUntil. * <LI> * This job hold until attribute's {@link java.util.Date Date} value and * <CODE>object</CODE>'s {@link java.util.Date Date} value are equal. * </OL> * * @param object Object to compare to. * * @return True if <CODE>object</CODE> is equivalent to this job hold * until attribute, false otherwise. */ public boolean equals(Object object) { return (super.equals(object) && object instanceof JobHoldUntil); } /** * Get the printing attribute class which is to be used as the "category" * for this printing attribute value. * <P> * For class JobHoldUntil, the category is class JobHoldUntil itself. * * @return Printing attribute class (category), an instance of class * {@link java.lang.Class java.lang.Class}. */ public final Class<? extends Attribute> getCategory() { return JobHoldUntil.class; } /** * Get the name of the category of which this attribute value is an * instance. * <P> * For class JobHoldUntil, the category name is <CODE>"job-hold-until"</CODE>. * * @return Attribute category name. */ public final String getName() { return "job-hold-until"; } }