| /** |
| * 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.camel.util; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Some helper methods for working with Java packages and versioning. |
| * |
| * @version |
| */ |
| public final class PackageHelper { |
| private static final transient Logger LOG = LoggerFactory.getLogger(PackageHelper.class); |
| |
| private PackageHelper() { |
| // Utility Class |
| } |
| |
| /** |
| * Returns true if the version number of the given package name can be found and is greater than or equal to the minimum version. |
| * |
| * For package names which include multiple dots, dots after the leftmost are removed. So for example a spring version of 2.5.1 |
| * is converted to 2.51 so you can assert that it's >= 2.51 (so above 2.50 and less than 2.52 etc). |
| * |
| * @param packageName the Java package name to compare |
| * @param minimumVersion the minimum version number |
| * @return true if the package name can be determined and if it's greater than or equal to the minimum value |
| */ |
| public static boolean isValidVersion(String packageName, double minimumVersion) { |
| try { |
| Package spring = Package.getPackage(packageName); |
| if (spring != null) { |
| String value = spring.getImplementationVersion(); |
| if (value != null) { |
| // lets remove any extra dots in the string... |
| int idx = value.indexOf('.'); |
| if (idx >= 0) { |
| StringBuilder buffer = new StringBuilder(value.substring(0, ++idx)); |
| int i = idx; |
| for (int size = value.length(); i < size; i++) { |
| char ch = value.charAt(i); |
| if (Character.isDigit(ch)) { |
| buffer.append(ch); |
| } |
| } |
| value = buffer.toString(); |
| } |
| |
| if (ObjectHelper.isNotEmpty(value)) { |
| double number = Double.parseDouble(value); |
| return number >= minimumVersion; |
| } else { |
| LOG.debug("Could not determine version of package: " + packageName); |
| } |
| } |
| } |
| } catch (Exception e) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Could not determine version of package: " + packageName, e); |
| } |
| } |
| |
| return true; |
| } |
| } |