Java tutorial
/* * Copyright (c) 2016, The Dattack team (http://www.dattack.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.dattack.jtoolbox.commons.configuration; import org.apache.commons.configuration.AbstractConfiguration; import org.apache.commons.configuration.CompositeConfiguration; import org.apache.commons.configuration.EnvironmentConfiguration; import org.apache.commons.configuration.PropertyConverter; import org.apache.commons.configuration.SystemConfiguration; import org.apache.commons.lang.ObjectUtils; /** * Provides utility methods for manage to <code>Configuration</code> instances. * * @author cvarela * @since 0.1 */ public final class ConfigurationUtil { /** * Create a <code>Configuration</code> based on the environment variables and system properties. * * @return a <code>Configuration</code> based on the environment variables and system properties */ public static CompositeConfiguration createEnvSystemConfiguration() { final CompositeConfiguration configuration = new CompositeConfiguration(); configuration.addConfiguration(new SystemConfiguration()); configuration.addConfiguration(new EnvironmentConfiguration()); return configuration; } /** * Interpolates the specified value. * * @param value * the value to be interpolated * @param configuration * the configuration object to use * @return the interpolated value */ public static String interpolate(final Object value, final AbstractConfiguration configuration) { return interpolate(ObjectUtils.toString(value), configuration); } /** * Interpolates the specified value. * * @param value * the value to be interpolated * @param configuration * the configuration object * @return the interpolated value * @see PropertyConverter#interpolate */ public static String interpolate(final String value, final AbstractConfiguration configuration) { if (value == null || configuration == null) { return value; } return PropertyConverter.interpolate(value, configuration).toString(); } private ConfigurationUtil() { // static class } }