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// DBAddress.java
/**
* Copyright (C) 2008 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.mongodb;
import java.net.InetAddress;
import java.net.UnknownHostException;
/**
* Represents a database address
*/
public class DBAddress extends ServerAddress {
/** Creates a new address
* Accepts as the parameter format:
* <table border="1">
* <tr>
* <td><i>name</i></td>
* <td>"mydb"</td>
* </tr>
* <tr>
* <td><i><host>/name</i></td>
* <td>"127.0.0.1/mydb"</td>
* </tr>
* <tr>
* <td><i><host>:<port>/name</i></td>
* <td>"127.0.0.1:8080/mydb"</td>
* </tr>
* </table>
* @param urlFormat
* @throws UnknownHostException
*/
public DBAddress( String urlFormat )
throws UnknownHostException {
super( _getHostSection( urlFormat ) );
_check( urlFormat , "urlFormat" );
_db = _fixName( _getDBSection( urlFormat ) );
_check( _host , "host" );
_check( _db , "db" );
}
static String _getHostSection( String urlFormat ){
if ( urlFormat == null )
throw new NullPointerException( "urlFormat can't be null" );
int idx = urlFormat.indexOf( "/" );
if ( idx >= 0 )
return urlFormat.substring( 0 , idx );
return null;
}
static String _getDBSection( String urlFormat ){
if ( urlFormat == null )
throw new NullPointerException( "urlFormat can't be null" );
int idx = urlFormat.indexOf( "/" );
if ( idx >= 0 )
return urlFormat.substring( idx + 1 );
return urlFormat;
}
static String _fixName( String name ){
name = name.replace( '.' , '-' );
return name;
}
/**
* @param other an existing <code>DBAddress</code> that gives the host and port
* @param dbname the database to which to connect
* @throws UnknownHostException
*/
public DBAddress( DBAddress other , String dbname )
throws UnknownHostException {
this( other._host , other._port , dbname );
}
/**
* @param host host name
* @param dbname database name
* @throws UnknownHostException
*/
public DBAddress( String host , String dbname )
throws UnknownHostException {
this( host , DBPort.PORT , dbname );
}
/**
* @param host host name
* @param port database port
* @param dbname database name
* @throws UnknownHostException
*/
public DBAddress( String host , int port , String dbname )
throws UnknownHostException {
super( host , port );
_db = dbname.trim();
}
/**
* @param addr host address
* @param port database port
* @param dbname database name
*/
public DBAddress( InetAddress addr , int port , String dbname ){
super( addr , port );
_check( dbname , "name" );
_db = dbname.trim();
}
static void _check( String thing , String name ){
if ( thing == null )
throw new NullPointerException( name + " can't be null " );
thing = thing.trim();
if ( thing.length() == 0 )
throw new IllegalArgumentException( name + " can't be empty" );
}
@Override
public int hashCode(){
return super.hashCode() + _db.hashCode();
}
@Override
public boolean equals( Object other ){
if ( other instanceof DBAddress ){
DBAddress a = (DBAddress)other;
return
a._port == _port &&
a._db.equals( _db ) &&
a._host.equals( _host );
} else if ( other instanceof ServerAddress ){
return other.equals(this);
}
return false;
}
/**
* creates a DBAddress pointing to a different database on the same server
* @param name database name
* @return
*/
public DBAddress getSister( String name ){
try {
return new DBAddress( _host , _port , name );
}
catch ( UnknownHostException uh ){
throw new MongoInternalException( "shouldn't be possible" , uh );
}
}
/**
* gets the database name
* @return
*/
public String getDBName(){
return _db;
}
/**
* gets a String representation of address as host:port/dbname.
* @return this address
*/
@Override
public String toString(){
return super.toString() + "/" + _db;
}
final String _db;
}