001/* 002 * BioJava development code 003 * 004 * This code may be freely distributed and modified under the 005 * terms of the GNU Lesser General Public Licence. This should 006 * be distributed with the code. If you do not have a copy, 007 * see: 008 * 009 * http://www.gnu.org/copyleft/lesser.html 010 * 011 * Copyright for this code is held jointly by the individual 012 * authors. These should be listed in @author doc comments. 013 * 014 * For more information on the BioJava project and its aims, 015 * or to join the biojava-l mailing list, visit the home page 016 * at: 017 * 018 * http://www.biojava.org/ 019 * 020 */ 021package org.biojava.nbio.core.alignment.matrices; 022 023/** 024 * Factory class to get Providers for substitution matrices that are provided by 025 * the AAINDEX database. 026 * 027 * @author Andreas Prlic 028 * 029 */ 030public class AAindexFactory { 031 032 private static AAIndexProvider provider = null; 033 034 /** 035 * Gets singleton instance of an {@code AAIndexProvider}, always non-null 036 * 037 * @return 038 */ 039 public static AAIndexProvider getAAIndexProvider() { 040 if (provider == null) 041 provider = new DefaultAAIndexProvider(); 042 return provider; 043 } 044 045 /** 046 * Sets the singleton provider. 047 * @param provider 048 */ 049 public static void setAAIndexProvider(AAIndexProvider provider) { 050 AAindexFactory.provider = provider; 051 } 052 053}