/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: ConnectionCache.java
*
* Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
*
* Electric(tm) is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.tool.generator.flag.router;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import com.sun.electric.database.topology.Connection;
import com.sun.electric.database.topology.NodeInst;
import com.sun.electric.database.topology.PortInst;
/** Object to allow efficient queries of the form: "Does PortInst
* have any ArcInst connected?"
*
* Note that this doesn't work right yet because PortInsts can't
* be compared using ==. Maybe PortInst should overload equals()
* and hashcode().
*
* */
public class ConnectionCache {
private Map<PortInst, List<Connection>> portToConns =
new HashMap<PortInst, List<Connection>>();
public ConnectionCache(NodeInst ni) {
for (Iterator<Connection> cIt=ni.getConnections(); cIt.hasNext();) {
Connection c = cIt.next();
PortInst p = c.getPortInst();
List<Connection> conns = portToConns.get(p);
if (conns==null) {
conns = new ArrayList<Connection>();
}
conns.add(c);
}
}
public boolean hasConnections(PortInst pi) {
List<Connection> conns = portToConns.get(pi);
return conns!=null;
}
}