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/* $Id$ */
package org.noreply.fancydress.type3;
import org.noreply.fancydress.crypto.*;
import org.noreply.fancydress.status.*;
import org.noreply.fancydress.directory.*;
import org.noreply.fancydress.misc.Util;
import org.noreply.fancydress.type3.routing.*;
import java.net.InetAddress;
import java.util.*;
public class PathSpec {
String pathSpec;
Path singlePath;
private String[] tokenize(String path) throws Mix3Exception {
ArrayList nicks = new ArrayList();
int indexFrom = 0;
int indexOf;
while ((indexOf = path.indexOf(',', indexFrom)) != -1) {
String v = path.substring(indexFrom, indexOf).trim();
if (v.equals(""))
throw new Mix3Exception("Invalid path.");
nicks.add( v );
indexFrom = indexOf + 1;
}
String v = path.substring(indexFrom).trim();
if (v.equals(""))
throw new Mix3Exception("Invalid path.");
nicks.add( v );
String[] result = new String[nicks.size()];
for (int i=0; i<result.length; i++)
result[i] = (String) nicks.get(i);
return result;
}
private Hop[] parseHalfPath(Directory dir, String path) throws Mix3Exception {
String[] nicks = tokenize(path);
Hop[] hops = new Hop[nicks.length];
for (int i=0; i<hops.length; i++) {
Server server = dir.getServer(nicks[i]);
if (server == null)
throw new Mix3Exception("Invalid path: "+nicks[i]+" not found");
ServerDescriptor desc = server.getDescriptor();
IncomingMMTPSection incoming = desc.getIncomingMMTPSection();
Routing routing;
if (incoming.getHostname() != null) { /* FIXME */
routing = new RoutingHOST(incoming.getHostname(), incoming.getPort(), server.getKeyID());
} else {
routing = new RoutingIP4(incoming.getIP(), incoming.getPort(), server.getKeyID());
}
hops[i] = new Hop(routing, desc.getPacketKey());
}
return hops;
}
/**
* Create a path specification from a string.
*
* A path spec could look like "<code>Foo,Bar,?:Baz,*2,~1</code>".
*
* FIXME: right now we don't do any random foo.
*
* @param path given path
*/
public PathSpec(Directory dir, String pathSpec, boolean singleLeg) throws Mix3Exception {
this.pathSpec = pathSpec;
int crossover = pathSpec.indexOf(':');
if (crossover < 0)
throw new Mix3Exception("Path is not a valid path: no crossover point specified.");
Hop[] leg1 = parseHalfPath(dir, pathSpec.substring(0, crossover));
Hop[] leg2 = parseHalfPath(dir, pathSpec.substring(crossover+1));
singlePath = new Path(leg1, leg2);
}
/**
* Return a path constructed from this PathSpec
*
* @param dir a directory
* @return path
*/
public Path getPath() throws Mix3Exception {
return singlePath;
}
}
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