/* * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package com.sun.jndi.url.dns;import java.util.Hashtable;import javax.naming.*;import javax.naming.spi.ObjectFactory;/** * A DNS URL context factory creates contexts that can resolve names * that are DNS pseudo-URLs. * In addition, if given a specific DNS URL (or an array of them), the * factory will resolve all the way to the named context. * See com.sun.jndi.dns.DnsUrl for a description of the URL format. * * @author Scott Seligman */public class dnsURLContextFactory implements ObjectFactory { public Object getObjectInstance(Object urlInfo, Name name, Context nameCtx, Hashtable<?,?> env) throws NamingException { if (urlInfo == null) { return (new dnsURLContext(env)); } else if (urlInfo instanceof String) { return getUsingURL((String) urlInfo, env); } else if (urlInfo instanceof String[]) { return getUsingURLs((String[]) urlInfo, env); } else { throw (new ConfigurationException( "dnsURLContextFactory.getObjectInstance: " + "argument must be a DNS URL String or an array of them")); } } private static Object getUsingURL(String url, Hashtable env) throws NamingException { dnsURLContext urlCtx = new dnsURLContext(env); try { return urlCtx.lookup(url); } finally { urlCtx.close(); } } /* * Try each URL until lookup() succeeds for one of them. * If all URLs fail, throw one of the exceptions arbitrarily. * Not pretty, but potentially more informative than returning null. */ private static Object getUsingURLs(String[] urls, Hashtable env) throws NamingException { if (urls.length == 0) { throw (new ConfigurationException( "dnsURLContextFactory: empty URL array")); } dnsURLContext urlCtx = new dnsURLContext(env); try { NamingException ne = null; for (int i = 0; i < urls.length; i++) { try { return urlCtx.lookup(urls[i]); } catch (NamingException e) { ne = e; } } throw ne; // failure: throw one of the exceptions caught } finally { urlCtx.close(); } }}
/*
* Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.jndi.url.dns;
import java.util.Hashtable;
import javax.naming.*;
import javax.naming.spi.ObjectFactory;
/**
* A DNS URL context factory creates contexts that can resolve names
* that are DNS pseudo-URLs.
* In addition, if given a specific DNS URL (or an array of them), the
* factory will resolve all the way to the named context.
* See com.sun.jndi.dns.DnsUrl for a description of the URL format.
*
* @author Scott Seligman
*/
public class dnsURLContextFactory implements ObjectFactory {
public Object getObjectInstance(Object urlInfo, Name name,
Context nameCtx, Hashtable<?,?> env)
throws NamingException {
if (urlInfo == null) {
return (new dnsURLContext(env));
} else if (urlInfo instanceof String) {
return getUsingURL((String) urlInfo, env);
} else if (urlInfo instanceof String[]) {
return getUsingURLs((String[]) urlInfo, env);
} else {
throw (new ConfigurationException(
"dnsURLContextFactory.getObjectInstance: " +
"argument must be a DNS URL String or an array of them"));
}
}
private static Object getUsingURL(String url, Hashtable env)
throws NamingException {
dnsURLContext urlCtx = new dnsURLContext(env);
try {
return urlCtx.lookup(url);
} finally {
urlCtx.close();
}
}
/*
* Try each URL until lookup() succeeds for one of them.
* If all URLs fail, throw one of the exceptions arbitrarily.
* Not pretty, but potentially more informative than returning null.
*/
private static Object getUsingURLs(String[] urls, Hashtable env)
throws NamingException {
if (urls.length == 0) {
throw (new ConfigurationException(
"dnsURLContextFactory: empty URL array"));
}
dnsURLContext urlCtx = new dnsURLContext(env);
try {
NamingException ne = null;
for (int i = 0; i < urls.length; i++) {
try {
return urlCtx.lookup(urls[i]);
} catch (NamingException e) {
ne = e;
}
}
throw ne; // failure: throw one of the exceptions caught
} finally {
urlCtx.close();
}
}
}