|
|
- /*-------------------------------------------------------------------------
- | rxtx is a native interface to serial ports in java.
- | Copyright 1997-2004 by Trent Jarvi taj@www.linux.org.uk
- |
- | This library is free software; you can redistribute it and/or
- | modify it under the terms of the GNU Library General Public
- | License as published by the Free Software Foundation; either
- | version 2 of the License, or (at your option) any later version.
- |
- | This library is distributed in the hope that it will be useful,
- | but WITHOUT ANY WARRANTY; without even the implied warranty of
- | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- | Library General Public License for more details.
- |
- | You should have received a copy of the GNU Library General Public
- | License along with this library; if not, write to the Free
- | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- --------------------------------------------------------------------------*/
- package gnu.io;
-
- import java.util.Enumeration;
-
- /**
- * @author Trent Jarvi
- * @version %I%, %G%
- * @since JDK1.0
- */
-
-
- class CommPortEnumerator implements Enumeration
- {
- private CommPortIdentifier index;
- private final static boolean debug = false;
- static
- {
- if (debug)
- System.out.println("CommPortEnumerator:{}");
- }
-
- CommPortEnumerator()
- {
- }
- /*------------------------------------------------------------------------------
- nextElement()
- accept:
- perform:
- return:
- exceptions:
- comments:
- ------------------------------------------------------------------------------*/
- public Object nextElement()
- {
- if(debug) System.out.println("CommPortEnumerator:nextElement()");
- synchronized (CommPortIdentifier.Sync)
- {
- if(index != null) index = index.next;
- else index=CommPortIdentifier.CommPortIndex;
- return(index);
- }
- }
- /*------------------------------------------------------------------------------
- hasMoreElements()
- accept:
- perform:
- return:
- exceptions:
- comments:
- ------------------------------------------------------------------------------*/
- public boolean hasMoreElements()
- {
- if(debug) System.out.println("CommPortEnumerator:hasMoreElements() " + CommPortIdentifier.CommPortIndex == null ? false : true );
- synchronized (CommPortIdentifier.Sync)
- {
- if(index != null) return index.next == null ? false : true;
- else return CommPortIdentifier.CommPortIndex == null ?
- false : true;
- }
- }
- }
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