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package javax.print.attribute;

import java.io.Serializable;

import java.util.Date;

Class DateTimeSyntax is an abstract base class providing the common implementation of all attributes whose value is a date and time.

Under the hood, a date-time attribute is stored as a value of class java.util.Date. You can get a date-time attribute's Date value by calling getValue(). A date-time attribute's Date value is established when it is constructed (see DateTimeSyntax(Date)). Once constructed, a date-time attribute's value is immutable.

To construct a date-time attribute from separate values of the year, month, day, hour, minute, and so on, use a java.util.Calendar object to construct a java.util.Date object, then use the java.util.Date object to construct the date-time attribute. To convert a date-time attribute to separate values of the year, month, day, hour, minute, and so on, create a java.util.Calendar object and set it to the java.util.Date from the date-time attribute. Class DateTimeSyntax stores its value in the form of a java.util.Date rather than a java.util.Calendar because it typically takes less memory to store and less time to compare a java.util.Date than a java.util.Calendar.

Author: Alan Kaminsky
/** * Class DateTimeSyntax is an abstract base class providing the common * implementation of all attributes whose value is a date and time. * <P> * Under the hood, a date-time attribute is stored as a value of class <code> * java.util.Date</code>. You can get a date-time attribute's Date value by * calling {@link #getValue() getValue()}. A date-time attribute's * Date value is established when it is constructed (see {@link * #DateTimeSyntax(Date) DateTimeSyntax(Date)}). Once * constructed, a date-time attribute's value is immutable. * <P> * To construct a date-time attribute from separate values of the year, month, * day, hour, minute, and so on, use a <code>java.util.Calendar</code> * object to construct a <code>java.util.Date</code> object, then use the * <code>java.util.Date</code> object to construct the date-time attribute. * To convert * a date-time attribute to separate values of the year, month, day, hour, * minute, and so on, create a <code>java.util.Calendar</code> object and * set it to the <code>java.util.Date</code> from the date-time attribute. Class * DateTimeSyntax stores its value in the form of a <code>java.util.Date * </code> * rather than a <code>java.util.Calendar</code> because it typically takes * less memory to store and less time to compare a <code>java.util.Date</code> * than a <code>java.util.Calendar</code>. * <P> * * @author Alan Kaminsky */
public abstract class DateTimeSyntax implements Serializable, Cloneable { private static final long serialVersionUID = -1400819079791208582L; // Hidden data members.
This date-time attribute'sjava.util.Date value.
@serial
/** * This date-time attribute's<code>java.util.Date</code> value. * @serial */
private Date value; // Hidden constructors.
Construct a new date-time attribute with the given java.util.Date value.
Params:
  • value – java.util.Date value.
Throws:
/** * Construct a new date-time attribute with the given * <code>java.util.Date </code> value. * * @param value <code>java.util.Date</code> value. * * @exception NullPointerException * (unchecked exception) Thrown if <CODE>theValue</CODE> is null. */
protected DateTimeSyntax(Date value) { if (value == null) { throw new NullPointerException("value is null"); } this.value = value; } // Exported operations.
Returns this date-time attribute's java.util.Date value.
Returns:the Date.
/** * Returns this date-time attribute's <code>java.util.Date</code> * value. * @return the Date. */
public Date getValue() { return new Date (value.getTime()); } // Exported operations inherited and overridden from class Object.
Returns whether this date-time attribute is equivalent to the passed in object. To be equivalent, all of the following conditions must be true:
  1. object is not null.
  2. object is an instance of class DateTimeSyntax.
  3. This date-time attribute's java.util.Date value and object's java.util.Date value are equal.
Params:
  • object – Object to compare to.
Returns: True if object is equivalent to this date-time attribute, false otherwise.
/** * Returns whether this date-time 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 DateTimeSyntax. * <LI> * This date-time attribute's <code>java.util.Date</code> value and * <CODE>object</CODE>'s <code>java.util.Date</code> value are * equal. </OL> * * @param object Object to compare to. * * @return True if <CODE>object</CODE> is equivalent to this date-time * attribute, false otherwise. */
public boolean equals(Object object) { return (object != null && object instanceof DateTimeSyntax && value.equals(((DateTimeSyntax) object).value)); }
Returns a hash code value for this date-time attribute. The hashcode is that of this attribute's java.util.Date value.
/** * Returns a hash code value for this date-time attribute. The hashcode is * that of this attribute's <code>java.util.Date</code> value. */
public int hashCode() { return value.hashCode(); }
Returns a string value corresponding to this date-time attribute. The string value is just this attribute's java.util.Date value converted to a string.
/** * Returns a string value corresponding to this date-time attribute. * The string value is just this attribute's * <code>java.util.Date</code> value * converted to a string. */
public String toString() { return "" + value; } }