conient/datacomponents/DateDataComponent.java

//---PACKAGE DECLARATION---
package uk.org.iscream.conient.datacomponents;

//---IMPORTS---
import javax.swing.JLabel;
import java.awt.GridLayout;
import java.util.Date;
import java.text.DateFormat;
import javax.swing.SwingUtilities;
import uk.org.iscream.util.XMLPacket;

/**
 * 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.
 *
 * @author  $Author: ajm4 $
 * @version $Id: DateDataComponent.java,v 1.8 2001/03/15 01:05:46 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 packet to obtain the value from, it then performs all
     * approriate conversions and adds this class to the Swing Event
     * Dispatching queue.
     *
     * In this case all we do is change string and pass it to our
     * super class for displaying.  Note that we need to *1000
     * as the data standard is for time in seconds, but java likes
     * milliseconds.
     *
     * @param packet the XMLPacket to get the data from
     * @throws DataFormatException if there was a problem converting the data for display
     */
    public void setValue(XMLPacket packet) throws DataFormatException {
        String value = packet.getParam(_attribute);
        try {
            if(!_ourCache.equals(value)) {
                _ourCache = value;
                _cache = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.MEDIUM).format(new Date(Long.parseLong(value) * 1000));
                SwingUtilities.invokeLater(this);
            }
        } catch (Exception e) {
            throw new DataFormatException(value + " is an invalid data type for " + toString());
        }
    }        

//---ATTRIBUTES---

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

//---STATIC ATTRIBUTES---

}
Revision:	1.9
Committed:	Sun Mar 18 14:43:39 2001 UTC (23 years, 2 months ago) by ajm
Branch:	MAIN
CVS Tags:	PROJECT_COMPLETION
Changes since 1.8:	+15 -12 lines
Log Message:	Lots of changes to allow components to have multiple attributes. This now means that data for memory/swap/disks/services are all correctly updated on the display the first time they get data. Rather than before, when they had to have at least two packets to gain all the data and would be slightly wrong. Now it is all fine and dandy...
#	User	Rev	Content
1	ajm	1.2	//---PACKAGE DECLARATION---
2	ajm	1.8	package uk.org.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	ajm	1.9	import javax.swing.SwingUtilities;
10			import uk.org.iscream.util.XMLPacket;
11	ajm	1.1
12	ajm	1.2	/**
13			* This is DataComponent specifically for converting
14			* time since epoc dates into a nice format.
15			*
16			* As this is essentially just string data we just
17			* extend StringDataComponent, intercepting the value
18			* to convert it.
19			*
20	ajm	1.7	* @author $Author: ajm4 $
21	ajm	1.9	* @version $Id: DateDataComponent.java,v 1.8 2001/03/15 01:05:46 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	ajm	1.9	* This takes the packet to obtain the value from, it then performs all
52			* approriate conversions and adds this class to the Swing Event
53			* Dispatching queue.
54	ajm	1.2	*
55			* In this case all we do is change string and pass it to our
56	ajm	1.5	* super class for displaying. Note that we need to *1000
57			* as the data standard is for time in seconds, but java likes
58			* milliseconds.
59	ajm	1.2	*
60	ajm	1.9	* @param packet the XMLPacket to get the data from
61	ajm	1.2	* @throws DataFormatException if there was a problem converting the data for display
62			*/
63	ajm	1.9	public void setValue(XMLPacket packet) throws DataFormatException {
64			String value = packet.getParam(_attribute);
65	ajm	1.1	try {
66	ajm	1.9	if(!_ourCache.equals(value)) {
67			_ourCache = value;
68			_cache = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.MEDIUM).format(new Date(Long.parseLong(value) * 1000));
69			SwingUtilities.invokeLater(this);
70	ajm	1.3	}
71	ajm	1.1	} catch (Exception e) {
72	ajm	1.3	throw new DataFormatException(value + " is an invalid data type for " + toString());
73	ajm	1.1	}
74			}
75	ajm	1.2
76			//---ATTRIBUTES---
77	ajm	1.3
78			/**
79	ajm	1.9	* Remembers what the last value was, so we
80	ajm	1.3	* only update if we have to.
81			*/
82	ajm	1.9	String _ourCache = "";
83	ajm	1.2
84			//---STATIC ATTRIBUTES---
85
86	ajm	1.5	}