001/* 002 * HA-JDBC: High-Availability JDBC 003 * Copyright (C) 2012 Paul Ferraro 004 * 005 * This program is free software: you can redistribute it and/or modify 006 * it under the terms of the GNU Lesser General Public License as published by 007 * the Free Software Foundation, either version 3 of the License, or 008 * (at your option) any later version. 009 * 010 * This program is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 013 * GNU Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public License 016 * along with this program. If not, see <http://www.gnu.org/licenses/>. 017 */ 018package net.sf.hajdbc.util; 019 020import java.util.Map; 021 022/** 023 * @author Paul Ferraro 024 */ 025public class SimpleStaticRegistry<K, V> implements StaticRegistry<K, V> 026{ 027 private final ExceptionMessageFactory<K> factory; 028 private final Map<K, V> map; 029 030 public SimpleStaticRegistry(Map<K, V> map) 031 { 032 this(null, map); 033 } 034 035 public SimpleStaticRegistry(ExceptionMessageFactory<K> factory, Map<K, V> map) 036 { 037 this.factory = factory; 038 this.map = map; 039 } 040 041 /** 042 * {@inheritDoc} 043 * @see net.sf.hajdbc.util.StaticRegistry#get(java.lang.Object) 044 */ 045 @Override 046 public V get(K key) 047 { 048 V value = this.map.get(key); 049 if ((value == null) && (this.factory != null)) 050 { 051 throw new IllegalArgumentException(this.factory.createMessage(key)); 052 } 053 return value; 054 } 055 056 public interface ExceptionMessageFactory<K> 057 { 058 String createMessage(K key); 059 } 060}