ConfigStore.java
上传用户:huihesys
上传日期:2007-01-04
资源大小:3877k
文件大小:4k
- /* CVS ID: $Id: ConfigStore.java,v 1.3 2000/04/06 08:02:01 wastl Exp $ */
- package net.wastl.webmail.config;
- import java.util.*;
- /*
- * ConfigStore.java
- *
- * Created: Tue Oct 19 11:54:12 1999
- *
- * Copyright (C) 1999-2000 Sebastian Schaffert
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- /**
- * This class is a generic storage for configuration parameters.
- * Subclasses must implement setConfigRaw and getConfigRaw.
- *
- * @author Sebastian Schaffert
- * @version
- */
- public abstract class ConfigStore {
-
- protected ConfigScheme scheme;
- public ConfigStore(ConfigScheme cs) {
- scheme=cs;
- }
- public ConfigStore() {
- this(new ConfigScheme());
- }
- public ConfigScheme getConfigScheme() {
- return scheme;
- }
- /**
- * Fetch all keys of the current configuration.
- */
- public Enumeration getConfigKeys() {
- return scheme.getPossibleKeys();
- }
- /**
- * Fetch the configuration associated with the specified key.
- * @param key Identifier for the configuration
- */
- public String getConfig(String key) {
- String value=getConfigRaw(key.toUpperCase());
- if(value==null || value.equals("")) {
- value=(String)scheme.getDefaultValue(key.toUpperCase());
- }
- if(value==null) {
- value="";
- }
- return value;
- }
- /**
- * Access a configuration on a low level, e.g. access a file, make a SQL query, ...
- * Will be called by getConfig.
- * return null if undefined
- */
- protected abstract String getConfigRaw(String key);
- public boolean isConfigSet(String key) {
- return getConfigRaw(key) != null;
- }
- public void setConfig(String key, String value) throws IllegalArgumentException {
- setConfig(key,value,true,true);
- }
- /**
- * Set a configuration "key" to the specified value.
- * @param key Identifier for the configuration
- * @paran value value to set
- */
- public void setConfig(String key, String value, boolean filter, boolean notify) throws IllegalArgumentException {
- if(!scheme.isValid(key,value)) throw new IllegalArgumentException();
- if(!(isConfigSet(key) && getConfigRaw(key).equals(value))) {
- // System.err.println("Key: "+key);
- // System.err.println("Value old: |"+getConfigRaw(key)+"|");
- // System.err.println("Value new: |"+value+"|");
- setConfigRaw(scheme.getConfigParameterGroup(key),
- key,
- filter?scheme.filter(key,value):value,
- scheme.getConfigParameterType(key));
- if(notify) scheme.notifyConfigurationChange(key);
- }
- }
-
- /**
- * Access a configuration on a low level, e.g. access a file, make a SQL query, ...
- * Will be called by setConfig.
- * return null if undefined
- */
- public abstract void setConfigRaw(String group,String key, String value, String type);
- public void addConfigurationListener(String key, ConfigurationListener l) {
- scheme.addConfigurationListener(key,l);
- }
- } // ConfigStore