| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.karaf.shell.ssh; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.apache.commons.io.IOUtils; |
| |
| public class ConfigHelper { |
| |
| public static final String BLUEPRINT_CONFIG = "OSGI-INF/blueprint/shell-ssh.xml"; |
| public static final String BLUEPRINT_VALUE_PATTERN = |
| "^.*<cm:property\\s*name=\"<<KEY>>\"\\s*value=\"([^\"]+)\".*$"; |
| |
| public static final String CONFIG_ALGORITHM = "algorithm"; |
| public static final String CONFIG_CIPHERS = "ciphers"; |
| public static final String CONFIG_KEXALGORITHMS = "kexAlgorithms"; |
| public static final String CONFIG_KEYSIZE = "keySize"; |
| public static final String CONFIG_MACS = "macs"; |
| |
| /** |
| * Retrieves a value from the specified blueprint configuration key. |
| * |
| * @param blueprintConfig the configuration file |
| * @param key the configuration key |
| * |
| * @return the configured value or <code>null</code> |
| * |
| * @throws FileNotFoundException in case the blueprint config can not be found |
| * @throws IOException in case an error occurs at blueprint config file reading |
| */ |
| public static String getValue(String blueprintConfig, String key) |
| throws IOException |
| { |
| ClassLoader cl = Thread.currentThread().getContextClassLoader(); |
| InputStream is = cl.getResourceAsStream(blueprintConfig); |
| if (is == null) { |
| // retry with our class... |
| cl = ConfigHelper.class.getClassLoader(); |
| is = cl.getResourceAsStream(blueprintConfig); |
| } |
| if (is == null) { |
| throw new FileNotFoundException( |
| "Unable to find blueprint configuration file: " |
| + blueprintConfig); |
| } |
| String xml = IOUtils.toString(is, "UTF-8"); |
| String regex = BLUEPRINT_VALUE_PATTERN.replaceFirst("<<KEY>>", key); |
| Pattern p = Pattern.compile(regex, Pattern.MULTILINE | Pattern.DOTALL); |
| Matcher m = p.matcher(xml); |
| if (m.find()) { |
| return m.group(1); |
| } |
| return null; |
| } |
| |
| /** |
| * Retrieves a value from the specified blueprint configuration key. |
| * |
| * @param key the configuration key |
| * |
| * @return the configured value or <code>null</code> |
| * |
| * @throws FileNotFoundException in case the blueprint config can not be found |
| * @throws IOException in case an error occurs at blueprint config file reading |
| */ |
| public static String getValue(String key) throws IOException { |
| return getValue(BLUEPRINT_CONFIG, key); |
| } |
| |
| public static Integer getValueAsInt(String key) throws IOException { |
| String value = getValue(key); |
| if (value != null) { |
| return Integer.valueOf(value); |
| } |
| return null; |
| } |
| } |