/**
* Copyright (c) 2011-2017, James Zhan 詹波 (jfinal@126.com).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jfinal.kit;
import java.io.File;
import java.util.concurrent.ConcurrentHashMap;
import com.jfinal.core.Const;
/**
* PropKit. PropKit can load properties file from CLASSPATH or File object.
*/
public class PropKit {
private static Prop prop = null;
private static final ConcurrentHashMap<String, Prop> map = new ConcurrentHashMap<String, Prop>();
private PropKit() {}
/**
* Using the properties file. It will loading the properties file if not loading.
* @see #use(String, String)
*/
public static Prop use(String fileName) {
return use(fileName, Const.DEFAULT_ENCODING);
}
/**
* Using the properties file. It will loading the properties file if not loading.
* <p>
* Example:<br>
* PropKit.use("config.txt", "UTF-8");<br>
* PropKit.use("other_config.txt", "UTF-8");<br><br>
* String userName = PropKit.get("userName");<br>
* String password = PropKit.get("password");<br><br>
*
* userName = PropKit.use("other_config.txt").get("userName");<br>
* password = PropKit.use("other_config.txt").get("password");<br><br>
*
* PropKit.use("com/jfinal/config_in_sub_directory_of_classpath.txt");
*
* @param fileName the properties file's name in classpath or the sub directory of classpath
* @param encoding the encoding
*/
public static Prop use(String fileName, String encoding) {
Prop result = map.get(fileName);
if (result == null) {
result = new Prop(fileName, encoding);
map.put(fileName, result);
if (PropKit.prop == null) {
PropKit.prop = result;
}
}
return result;
}
/**
* Using the properties file bye File object. It will loading the properties file if not loading.
* @see #use(File, String)
*/
public static Prop use(File file) {
return use(file, Const.DEFAULT_ENCODING);
}
/**
* Using the properties file bye File object. It will loading the properties file if not loading.
* <p>
* Example:<br>
* PropKit.use(new File("/var/config/my_config.txt"), "UTF-8");<br>
* Strig userName = PropKit.use("my_config.txt").get("userName");
*
* @param file the properties File object
* @param encoding the encoding
*/
public static Prop use(File file, String encoding) {
Prop result = map.get(file.getName());
if (result == null) {
result = new Prop(file, encoding);
map.put(file.getName(), result);
if (PropKit.prop == null) {
PropKit.prop = result;
}
}
return result;
}
public static Prop useless(String fileName) {
Prop previous = map.remove(fileName);
if (PropKit.prop == previous) {
PropKit.prop = null;
}
return previous;
}
public static void clear() {
prop = null;
map.clear();
}
public static Prop getProp() {
if (prop == null) {
throw new IllegalStateException("Load propties file by invoking PropKit.use(String fileName) method first.");
}
return prop;
}
public static Prop getProp(String fileName) {
return map.get(fileName);
}
public static String get(String key) {
return getProp().get(key);
}
public static String get(String key, String defaultValue) {
return getProp().get(key, defaultValue);
}
public static Integer getInt(String key) {
return getProp().getInt(key);
}
public static Integer getInt(String key, Integer defaultValue) {
return getProp().getInt(key, defaultValue);
}
public static Long getLong(String key) {
return getProp().getLong(key);
}
public static Long getLong(String key, Long defaultValue) {
return getProp().getLong(key, defaultValue);
}
public static Boolean getBoolean(String key) {
return getProp().getBoolean(key);
}
public static Boolean getBoolean(String key, Boolean defaultValue) {
return getProp().getBoolean(key, defaultValue);
}
public static boolean containsKey(String key) {
return getProp().containsKey(key);
}
}