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The Core Camel Java DSL based router
/**
* 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 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;
}
}