conient/datacomponents/DateDataComponent.java

//---PACKAGE DECLARATION---
uk.ac.ukc.iscream.conient.datacomponents;

//---IMPORTS---
import javax.swing.JLabel;
import java.awt.GridLayout;
import java.util.Date;
import java.text.DateFormat;

/**
 * This is DataComponent specifically for converting
 * time since epoc dates into a nice format.
 *
 * As this is essentially just string data we just
 * extend StringDataComponent, intercepting the value
 * to convert it.
 *
 * It uses the JProgressBar to display the value.
 *
 * @author  $Author: ajm4 $
 * @version $Id: DateDataComponent.java,v 1.2 2001/01/22 12:32:14 ajm4 Exp $
 */
public class DateDataComponent extends StringDataComponent {

//---FINAL ATTRIBUTES---

//---STATIC METHODS---

//---CONSTRUCTORS---

    /**
     * Creates the component with a friendly name to be 
     * used as label, but as we're a very basic
     * extension of StringDataComponent, we just construct
     * that.
     *
     * @param name the friendly name
     * @param attribute the data attribute we look after
     */
    public DateDataComponent(String name, String attribute) {
        super(name, attribute);
    }

//---PUBLIC METHODS---

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---
     
    /**
     * This takes the String value of the parameter that this component
     * is monitoring direct from the packet, it then performs all
     * approriate conversions and displays the data.
     *
     * In this case all we do is change string and pass it to our
     * super class for displaying.
     *
     * @param value the value for this data component
     * @throws DataFormatException if there was a problem converting the data for display
     */
    public void setValue(String value) throws DataFormatException {
        try {
            if(!_cache.equals(value)) {
                _cache = value;
                value = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.MEDIUM).format(new Date(Long.parseLong(value)));
                super.setValue(value);
            }
        } catch (Exception e) {
            throw new DataFormatException(value + " is an invalid data type for " + toString());
        }
    }        

//---ATTRIBUTES---

    /**
     * Remebers what the last value was, so we
     * only update if we have to.
     */    
    String _cache = "";

//---STATIC ATTRIBUTES---

}
Revision:	1.3
Committed:	Wed Jan 24 01:54:43 2001 UTC (23 years, 4 months ago) by ajm
Branch:	MAIN
Changes since 1.2:	+17 -6 lines
Log Message:	moved into the package and restructed to allow non-visible components
#	User	Rev	Content
1	ajm	1.2	//---PACKAGE DECLARATION---
2	ajm	1.3	uk.ac.ukc.iscream.conient.datacomponents;
3	ajm	1.2
4			//---IMPORTS---
5	ajm	1.1	import javax.swing.JLabel;
6			import java.awt.GridLayout;
7			import java.util.Date;
8			import java.text.DateFormat;
9
10	ajm	1.2	/**
11			* This is DataComponent specifically for converting
12			* time since epoc dates into a nice format.
13			*
14			* As this is essentially just string data we just
15			* extend StringDataComponent, intercepting the value
16			* to convert it.
17			*
18			* It uses the JProgressBar to display the value.
19			*
20			* @author $Author: ajm4 $
21	ajm	1.3	* @version $Id: DateDataComponent.java,v 1.2 2001/01/22 12:32:14 ajm4 Exp $
22	ajm	1.2	*/
23	ajm	1.1	public class DateDataComponent extends StringDataComponent {
24	ajm	1.2
25			//---FINAL ATTRIBUTES---
26
27			//---STATIC METHODS---
28
29			//---CONSTRUCTORS---
30
31			/**
32			* Creates the component with a friendly name to be
33			* used as label, but as we're a very basic
34			* extension of StringDataComponent, we just construct
35			* that.
36			*
37			* @param name the friendly name
38	ajm	1.3	* @param attribute the data attribute we look after
39	ajm	1.2	*/
40	ajm	1.3	public DateDataComponent(String name, String attribute) {
41			super(name, attribute);
42	ajm	1.1	}
43	ajm	1.2
44			//---PUBLIC METHODS---
45
46			//---PRIVATE METHODS---
47
48			//---ACCESSOR/MUTATOR METHODS---
49
50			/**
51			* This takes the String value of the parameter that this component
52			* is monitoring direct from the packet, it then performs all
53			* approriate conversions and displays the data.
54			*
55			* In this case all we do is change string and pass it to our
56			* super class for displaying.
57			*
58			* @param value the value for this data component
59			* @throws DataFormatException if there was a problem converting the data for display
60			*/
61	ajm	1.1	public void setValue(String value) throws DataFormatException {
62			try {
63	ajm	1.3	if(!_cache.equals(value)) {
64			_cache = value;
65			value = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.MEDIUM).format(new Date(Long.parseLong(value)));
66			super.setValue(value);
67			}
68	ajm	1.1	} catch (Exception e) {
69	ajm	1.3	throw new DataFormatException(value + " is an invalid data type for " + toString());
70	ajm	1.1	}
71			}
72	ajm	1.2
73			//---ATTRIBUTES---
74	ajm	1.3
75			/**
76			* Remebers what the last value was, so we
77			* only update if we have to.
78			*/
79			String _cache = "";
80	ajm	1.2
81			//---STATIC ATTRIBUTES---
82
83	ajm	1.1	}