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1: /** 2: * ======================================== 3: * JFreeReport : a free Java report library 4: * ======================================== 5: * 6: * Project Info: http://reporting.pentaho.org/ 7: * 8: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 9: * 10: * This library is free software; you can redistribute it and/or modify it under the terms 11: * of the GNU Lesser General Public License as published by the Free Software Foundation; 12: * either version 2.1 of the License, or (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16: * See the GNU Lesser General Public License for more details. 17: * 18: * You should have received a copy of the GNU Lesser General Public License along with this 19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 20: * Boston, MA 02111-1307, USA. 21: * 22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 23: * in the United States and other countries.] 24: * 25: * ------------ 26: * $Id: NullConfigStorage.java 2725 2007-04-01 18:49:29Z taqua $ 27: * ------------ 28: * (C) Copyright 2000-2005, by Object Refinery Limited. 29: * (C) Copyright 2005-2007, by Pentaho Corporation. 30: */ 31: 32: package org.jfree.report.modules.preferences.base; 33: 34: import org.jfree.util.Configuration; 35: 36: /** 37: * An empty default implementation. This config storare will not store any values and will 38: * provide no read access to stored properties by denying their existence. 39: * 40: * @author Thomas Morgner 41: */ 42: public class NullConfigStorage implements ConfigStorage 43: { 44: /** 45: * DefaultConstructor. 46: */ 47: public NullConfigStorage () 48: { 49: } 50: 51: /** 52: * This method does nothing. 53: * 54: * @param configPath this parameter is not used. 55: * @param properties this parameter is not used. 56: * @see org.jfree.report.modules.misc.configstore.base.ConfigStorage#storeProperties 57: * (java.lang.String, java.util.Properties) 58: */ 59: public void store (final String configPath, final Configuration properties) 60: { 61: } 62: 63: /** 64: * Loads the properties from the given path, specifying the given properties as 65: * default. 66: * <p/> 67: * This implementation will always throw and ConfigStoreException as the specified 68: * resource is not available. 69: * 70: * @param configPath the configuration path from where to read the properties. 71: * @param defaults the property set that acts as fallback to provide default values. 72: * @return the loaded properties 73: * 74: * @throws ConfigStoreException always throws this exception as the specified resource 75: * will be not available. 76: */ 77: public Configuration load (final String configPath, final Configuration defaults) 78: throws ConfigStoreException 79: { 80: throw new ConfigStoreException("This configuration path is not available."); 81: } 82: 83: /** 84: * Tests, whether some configuration data exists for the given configuration. 85: * <p/> 86: * This method returns always false and denies the existence of any resource. 87: * 88: * @param configPath the configuration path to the property storage. 89: * @return always false as this implementation does not store anything. 90: */ 91: public boolean isAvailable (final String configPath) 92: { 93: return false; 94: } 95: }