tahitiitem.java

aglet的部分源码

package com.ibm.aglets.tahiti;

/*
 * @(#)DigestTable.java
 * 
 * IBM Confidential-Restricted
 * 
 * OCO Source Materials
 * 
 * 03L7246 (c) Copyright IBM Corp. 1996, 1998
 * 
 * The source code for this program is not published or otherwise
 * divested of its trade secrets, irrespective of what has been
 * deposited with the U.S. Copyright Office.
 */

import com.ibm.aglet.AgletProxy;
import com.ibm.aglet.AgletInfo;
import com.ibm.aglet.InvalidAgletException;
import com.ibm.awb.misc.Resource;
import java.util.Date;

/*
 * An object which is associated to a list item in the Tahiti main window.
 * 
 * @author Yoshiaki Mima
 */

final public class TahitiItem {
	final static int KEY_LASTUPDATE = 0;
	final static int KEY_TIMESTAMP = 1;
	final static int KEY_CLASSNAME = 2;

	static int _keyOrder = KEY_LASTUPDATE;
	static boolean _isAscentOrder = true;
	static boolean _isPrecise = true;
	static boolean _needUpdate = false;		// true;
	static boolean _fInit = false;

	AgletProxy _proxy;
	Date _date;
	String _timestamp;
	String _timestampSimple;
	String _classname;
	String _classnameSimple;
	boolean _isValid = false;

	/*
	 * Constractor
	 */
	public TahitiItem() {
		_keyOrder = KEY_LASTUPDATE;
		_needUpdate = true;
	}
	public TahitiItem(AgletProxy proxy) {
		try {
			if (_isValid = proxy.isValid()) {
				_proxy = proxy;
				AgletInfo info = proxy.getAgletInfo();

				_date = new Date(info.getCreationTime());
				_classname = info.getAgletClassName();
			} 
		} catch (InvalidAgletException ex) {}
		catch (RuntimeException ex) {
			ex.printStackTrace();
		} 
		finally {}
	}
	boolean checkProxy(AgletProxy proxy) {
		return (_proxy == proxy);
	}
	int compareTo(TahitiItem tahitiItem) {
		int cmp = 0;

		switch (_keyOrder) {
		case KEY_LASTUPDATE:
			cmp = -1;
			break;
		case KEY_TIMESTAMP:
			if (_date.after(tahitiItem._date)) {
				cmp = 1;
			} else if (_date.before(tahitiItem._date)) {
				cmp = -1;
			} else {
				cmp = _classname.compareTo(tahitiItem._classname);
			} 
			break;
		case KEY_CLASSNAME:
			cmp = _classname.compareTo(tahitiItem._classname);
			if (cmp == 0) {
				if (_date.after(tahitiItem._date)) {
					cmp = 1;
				} else if (_date.before(tahitiItem._date)) {
					cmp = -1;
				} else {
					cmp = 0;
				} 
			} 
			break;
		default:
			break;
		}

		if (_isAscentOrder == false) {
			cmp = -cmp;
		} 

		return cmp;
	}
	AgletProxy getAgletProxy() {
		return _proxy;
	}
	/*
	 * Instance methods
	 */
	String getClassName() {
		if (_isPrecise) {
			return _classname;
		} else {
			int len = 0;

			len = _classname.length();
			if (len > 20) {

				// replace last string "Aglet" with ".."
				if (_classname.endsWith("Aglet")) {
					_classnameSimple = _classname.substring(0, len - 5) 
									   + "..";
				} else {
					_classnameSimple = new String(_classname);
				} 

				// replace left part of classname with ".."
				len = _classnameSimple.length();
				if (len > 20) {
					_classnameSimple = ".." 
									   + _classnameSimple.substring(len - 18, 
									   len);
				} else {
					_classnameSimple = (_classnameSimple + "   ").substring(0, 
							20);
				} 
			} else {
				_classnameSimple = 
					(_classname + "                    ").substring(0, 20);
			} 
			return _classnameSimple;
		} 
	}
	static boolean getPrecision() {
		return _isAscentOrder;
	}
	String getText() {
		String text;

		switch (_keyOrder) {
		case KEY_LASTUPDATE:
			text = getClassName() + " : " + getTimeStamp();
			break;
		case KEY_TIMESTAMP:
			text = getTimeStamp() + " : " + getClassName();
			break;
		case KEY_CLASSNAME:
			text = getClassName() + " : " + getTimeStamp();
			break;
		default:
			text = getTimeStamp() + " : " + getClassName();
			break;
		}

		return text;
	}
	String getTimeStamp() {
		_timestamp = _date.toString();
		if (_isPrecise) {
			return _timestamp;
		} else {
			_timestampSimple = _timestamp.substring(11, 19);

			return _timestampSimple;
		} 
	}
	/*
	 * Class methods
	 */
	static void init() {
		if (_fInit) {
			return;
		} 
		_fInit = true;

		Resource tahiti_res = Resource.getResourceFor("tahiti");
		String key = tahiti_res.getString("tahiti.itemkey", "event order");
		String order = tahiti_res.getString("tahiti.itemorder", "ascent");
		String precision = tahiti_res.getString("tahiti.itemprecision", 
												"complete");

		// tahiti items view control
		if (key.equals("event order")) {
			setKeyItem(TahitiItem.KEY_LASTUPDATE);
		} else if (key.equals("creation time")) {
			setKeyItem(TahitiItem.KEY_TIMESTAMP);
		} else if (key.equals("class name")) {
			setKeyItem(TahitiItem.KEY_CLASSNAME);
		} 
		;

		if (order.equals("ascent")) {
			setAscentOrder();
		} else if (order.equals("descent")) {
			setDescentOrder();
		} 
		;

		if (precision.equals("complete")) {
			setPrecision(true);
		} else if (precision.equals("compact")) {
			setPrecision(false);
		} 
		;

		// System.out.println("TahitiItem: key: " + key + " order: " + order + " precision: " + precision);
	}
	static boolean isAscentOrder() {
		return _isAscentOrder;
	}
	static boolean isNeedUpdate() {
		boolean retval = _needUpdate;

		_needUpdate = false;
		return retval;
	}
	static void setAscentOrder() {
		if (_isAscentOrder) {
			return;
		} 
		_isAscentOrder = true;
		_needUpdate = true;
	}
	static void setDescentOrder() {
		if (!_isAscentOrder) {
			return;
		} 
		_isAscentOrder = false;
		_needUpdate = true;
	}
	static void setKeyItem(int key) {
		if (_keyOrder == key) {
			return;
		} 
		_keyOrder = key;
		_needUpdate = true;
	}
	static void setPrecision(boolean precision) {
		if (_isPrecise == precision) {
			return;
		} 
		_isPrecise = precision;
		_needUpdate = true;
	}
}