Java tutorial
/** * Copyright 2013 Sean Kavanagh - sean.p.kavanagh6@gmail.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.ec2box.common.util; import org.apache.commons.lang3.StringUtils; import java.util.LinkedHashMap; import java.util.Map; import java.util.ResourceBundle; import java.util.Set; /** * Utility to look up configurable commands and resources */ public class AppConfig { private static ResourceBundle prop = ResourceBundle.getBundle("EC2BoxConfig"); private AppConfig() { } /** * gets the property from config * * @param name property name * @return configuration property */ public static String getProperty(String name) { return prop.getString(name); } /** * gets the property from config * * @param name property name * @param defaultValue default value if property is empty * @return configuration property */ public static String getProperty(String name, String defaultValue) { String value = prop.getString(name); if (StringUtils.isEmpty(value)) { value = defaultValue; } return value; } /** * gets the property from config and replaces placeholders * * @param name property name * @param replacementMap name value pairs of place holders to replace * @return configuration property */ public static String getProperty(String name, Map<String, String> replacementMap) { String value = prop.getString(name); //iterate through map to replace text Set<String> keySet = replacementMap.keySet(); for (String key : keySet) { //replace values in string String rVal = replacementMap.get(key); value = value.replace("${" + key + "}", rVal); } return value; } /** * gets the property from config and returns map of name / value pairs * * @param name property name * @return configuration property */ public static Map<String, String> getMapProperties(String name) { String values = prop.getString(name); Map<String, String> map = new LinkedHashMap<>(); for (String set : values.split(";")) { String key = set.split(",")[0]; String val = set.split(",")[1]; map.put(key, val); } return map; } }