Java Path File Name nio filterJarContainingClass(Collection jarsPaths, String className)

Description

filter Jar Containing Class

License

Apache License

Declaration

private static Path filterJarContainingClass(Collection<File> jarsPaths, String className)
            throws IOException, ClassNotFoundException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2018 RaspInLoop/*  ww  w.j a  v a  2 s  .c  om*/
 * 
 * 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.
 ******************************************************************************/

import java.io.File;

import java.io.IOException;

import java.nio.file.Path;
import java.util.Collection;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class Main {
    private static Path filterJarContainingClass(Collection<File> jarsPaths, String className)
            throws IOException, ClassNotFoundException {

        for (File file : jarsPaths) {

            JarFile jarFile = new JarFile(file);
            if (containsClass(jarFile, className)) {
                return file.toPath();
            }
        }
        // not found
        return null;
    }

    private static boolean containsClass(JarFile jarFile, String agentRunnerClassName) {

        Enumeration<JarEntry> e = jarFile.entries();
        while (e.hasMoreElements()) {
            JarEntry je = e.nextElement();
            if (je.isDirectory() || !je.getName().endsWith(".class")) {
                continue;
            }
            // -6 because of .class
            String className = je.getName().substring(0, je.getName().length() - 6);
            className = className.replace('/', '.');
            if (className.equals(agentRunnerClassName))
                return true;
        }
        return false;
    }
}

Related

1. convertFilePathToName(Path file)
2. detectFilePath(String propertyName, String confFileName)
3. endsWith(File file, String pathname)
4. fileName(final Path path)
5. fileName(final Path thePath)
6. findExecutablePaths(String executableName)
7. findFile(Path directoryPath, String fileName)
8. findFile(String basePath, final String fileName)
9. findNextFileName(Path folder, String name)