/*******************************************************************************
* Copyright (c) 2010 Markus Alexander Kuppe.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Markus Alexander Kuppe (ecf-dev_eclipse.org <at> lemmster <dot> de) - initial API and implementation
******************************************************************************/
package org.eclipse.ecf.provider.dnssd;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.eclipse.ecf.discovery.identity.IServiceTypeID;
import org.xbill.DNS.Lookup;
import org.xbill.DNS.TextParseException;
import org.xbill.DNS.Type;
/**
* This ServiceType represents the special RRs defined in
* chapter 12. Discovery of Browsing and Registration Domains
*
* @see http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt
*/
public class BnRDnsSdServiceTypeID extends DnsSdServiceTypeID {
private static final long serialVersionUID = -466458565598238072L;
/**
* A list of domains recommended for browsing
*/
static final String BROWSE_DOMAINS = "b._dns-sd"; //$NON-NLS-1$
/**
* A single recommended default domain for browsing
*/
static final String DEFAULT_BROWSE_DOMAIN = "db._dns-sd"; //$NON-NLS-1$
/**
* A list of domains recommended for registering services using Dynamic Update
*/
static final String REG_DOMAINS = "r._dns-sd"; //$NON-NLS-1$
/**
* A single recommended default domain for registering services.
*/
static final String DEFAULT_REG_DOMAIN = "dr._dns-sd"; //$NON-NLS-1$
BnRDnsSdServiceTypeID(IServiceTypeID aServiceType, String aService) {
super(aServiceType.getNamespace(), aServiceType);
services = new String[] {aService};
}
/* (non-Javadoc)
* @see org.eclipse.ecf.provider.dnssd.DnsSdServiceTypeID#getInternalQueries()
*/
Lookup[] getInternalQueries() {
List result = new ArrayList();
for (int i = 0; i < scopes.length; i++) {
String scope = scopes[i];
// remove dangling "."
if(scope.endsWith(".")) { //$NON-NLS-1$
scope = scope.substring(0, scope.length() - 1);
}
Lookup query;
try {
query = new Lookup(services[0] + "._udp" + "." + scope + ".", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
Type.PTR);
} catch (TextParseException e) {
continue;
}
result.add(query);
}
return (Lookup[]) result.toArray(new Lookup[result.size()]);
}
void setScope(String target) {
if(target.endsWith(".")) { //$NON-NLS-1$
target = target.substring(0, target.length() - 1);
}
scopes = new String[]{target};
createType();
}
Collection getScopesAsZones() {
final List res = new ArrayList(scopes.length);
for (int i = 0; i < scopes.length; i++) {
String scope = scopes[i];
res.add(scope + "."); //$NON-NLS-1$
}
return res;
}
}