/*
* Copyright 1990-2009 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program 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.
*
* This program 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 at /legal/license.txt).
*
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.midp.io.j2me.push;
/**
* Connection string parser.
*/
public final class Connection {
/**
* Protocol name.
*
* <p>
* <strong>Invariant</strong>: never <code>null</code> or empty.
* </p>
*/
private final String protocol;
/**
* Target.
*
* <p>
* <strong>Invariant</strong>: never <code>null</code>.
* </p>
*/
private final String target;
/**
* Params.
*/
private final String params;
/**
* Constructs a connection.
*
* @param protocol protocol
* @param target target
* @param params params
*/
private Connection(
final String protocol,
final String target,
final String params) {
// assert (protocol != null) && (protocol.length() > 0);
this.protocol = protocol;
// assert (target != null);
this.target = target;
this.params = params;
}
/**
* Gets a protocol.
*
* <p>
* <strong>Invariant</strong>: never <code>null</code> or empty.
* </p>
*
* @return protocol
*/
public String getProtocol() {
return protocol;
}
/**
* Gets a target.
*
* <p>
* <strong>Invariant</strong>: never <code>null</code>.
* </p>
*
* @return target
*/
public String getTarget() {
return target;
}
/**
* Gets params.
*
* <p>
* Params (if any) are prefixed with ';'.
* </p>
*
* @return params
*/
public String getParams() {
return params;
}
/**
* Returns original, unmodifed connection string.
*
* @return connection string
*/
public String getConnection() {
final String s = protocol + ":" + target;
return (params != null) ? s + params : s;
}
/**
* Parses a connection string.
*
* @param connection connection string to parse
*
* @return Connection object
*
* @throws IllegalArgumentException if connection is invalid
*/
public static Connection parse(final String connection)
throws IllegalArgumentException {
if (connection == null) {
throw new IllegalArgumentException("connection is null");
}
// Parse a connection string partially (fetching scheme and the rest)
// Actually, I'd rather factor it into a class
final int colonPos = connection.indexOf(':');
if (colonPos == -1) {
throw new IllegalArgumentException("connection is invalid");
}
if (colonPos < 1) {
throw new IllegalArgumentException("invalid protocol");
}
final String protocol = connection.substring(0, colonPos);
final String targetAndParams = connection.substring(colonPos + 1);
final int paramsPos = targetAndParams.indexOf(';');
if (paramsPos == -1) {
return new Connection(protocol, targetAndParams, null);
} else {
final String target = targetAndParams.substring(0, paramsPos);
final String params = targetAndParams.substring(paramsPos);
return new Connection(protocol, target, params);
}
}
}