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PatternTesting Runtime (patterntesting-rt) is the runtime component for the PatternTesting framework. It provides the annotations and base classes for the PatternTesting testing framework (e.g. patterntesting-check, patterntesting-concurrent or patterntesting-exception) but can be also used standalone for classpath monitoring or profiling. It uses AOP and AspectJ to perform this feat.

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/**
 * $Id: ClasspathHelper.java,v 1.9 2016/12/18 20:19:36 oboehm Exp $
 *
 * Copyright (c) 2009 by Oliver Boehm
 *
 * 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 orimplied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * (c)reated 27.07.2009 by oliver ([email protected])
 */

package patterntesting.runtime.util;

import org.apache.commons.lang3.StringUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.net.URI;

/**
 * This class contains some helper classes which are used inside
 * ClasspathMonitor and ClasspathDigger. Some of the methods were
 * formerly placed in ClasspathMonitor but also needed by ClasspathDigger. To
 * avoid dependencies from ClasspathDigger to ClasspathMonitor the common
 * methods were moved to this class here.
 *
 * @author oliver
 * @version $Revision: 1.9 $
 * @since 27.07.2009
 */
public final class ClasspathHelper {

	private static final Logger LOG = LogManager.getLogger(ClasspathHelper.class);

	/** to avoid instantiation */
	private ClasspathHelper() {
	}

	/**
	 * Don't use @ProfileMe here! This method is also used when ProfileStatistic
	 * is set up!.
	 *
	 * @param path
	 *            e.g. "jar:file:/a/b/c.jar!/d/e.class
	 * @param resource
	 *            e.g. "/d/e.class"
	 * @return e.g. "jar:file:/a/b/c.jar"
	 */
	public static URI getParent(final URI path, final String resource) {
		String p = removeTrailingSlash(path.toString());
		String res = removeTrailingSlash(resource);
		String parent = StringUtils.removeEnd(p, res);
		parent = removeTrailingSlash(parent);
		if (parent.endsWith("!")) {
			parent = parent.substring(0, (parent.length() - 1));
		}
		return Converter.toURI(parent);
	}

	private static String removeTrailingSlash(final String s) {
		if (s.endsWith("/") || s.endsWith("\\")) {
			return s.substring(0, (s.length() - 1));
		}
		return s;
	}

	/**
	 * Gets the parent of the given class.
	 *
	 * @param path
	 *            e.g. "jar:file:/a/b/c.jar!/d/e.class
	 * @param clazz
	 *            e.gl. "d.e.class"
	 * @return e.g. "jar:file:/a/b/c.jar"
	 */
	public static URI getParent(final URI path, final Class clazz) {
		String resource = Converter.toResource(clazz);
		return getParent(path, resource);
	}

}