| /** |
| * Copyright (C) 2010 the original author or authors. |
| * See the notice.md file distributed with this work for additional |
| * information regarding copyright ownership. |
| * |
| * 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.beust.jcommander.defaultprovider; |
| |
| import com.beust.jcommander.IDefaultProvider; |
| import com.beust.jcommander.ParameterException; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.Properties; |
| |
| /** |
| * A default provider that reads its default values from a property file. |
| * |
| * @author cbeust |
| */ |
| public class PropertyFileDefaultProvider implements IDefaultProvider { |
| public static final String DEFAULT_FILE_NAME = "jcommander.properties"; |
| private Properties m_properties; |
| |
| public PropertyFileDefaultProvider() { |
| init(DEFAULT_FILE_NAME); |
| } |
| |
| public PropertyFileDefaultProvider(String fileName) { |
| init(fileName); |
| } |
| |
| private void init(String fileName) { |
| try { |
| m_properties = new Properties(); |
| URL url = ClassLoader.getSystemResource(fileName); |
| if (url != null) { |
| m_properties.load(url.openStream()); |
| } else { |
| throw new ParameterException("Could not find property file: " + fileName |
| + " on the class path"); |
| } |
| } |
| catch (IOException e) { |
| throw new ParameterException("Could not open property file: " + fileName); |
| } |
| } |
| |
| public String getDefaultValueFor(String optionName) { |
| int index = 0; |
| while (index < optionName.length() && ! Character.isLetterOrDigit(optionName.charAt(index))) { |
| index++; |
| } |
| String key = optionName.substring(index); |
| return m_properties.getProperty(key); |
| } |
| |
| } |