datasources.java

java 数据库 功能强大 效率高 SmallSQL Database is a free DBMS library for the Java(tm) platform. It runs on

/* =============================================================
 * SmallSQL : a free Java DBMS library for the Java(tm) platform
 * =============================================================
 *
 * (C) Copyright 2004-2006, by Volker Berlin.
 *
 * Project Info:  http://www.smallsql.de/
 *
 * This library is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation; either version 2.1 of the License, or 
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ---------------
 * DataSources.java
 * ---------------
 * Author: Volker Berlin
 * 
 */
package smallsql.database;

/**
 * @author Volker Berlin
 *
 */
final class DataSources {
	
	private int size;
	private DataSource[] data = new DataSource[4];
	
	final int size(){
		return size;
	}

	final DataSource get(int idx){
		if (idx >= size)
			throw new IndexOutOfBoundsException("Index: "+idx+", Size: "+size);
		return data[idx];
	}
	
	final void add(DataSource table){
		if(size >= data.length ){
			DataSource[] dataNew = new DataSource[size << 1];
			System.arraycopy(data, 0, dataNew, 0, size);
			data = dataNew;
		}
		data[size++] = table;
	}
}