Quelle ClassPathTest.java Sprache: JAVA

/*
* Copyright (c) 1998, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

/* @test
* @bug 4110602
* @author Benjamin Renaud
* @summary check that URLClassLoader correctly interprets Class-Path
*
* This test ensures that a manually constructed URLClassLoader is
* able to:
*
* 1. load a class
* 2. resolve Class-Path dependencies
* 3. have that class use a dependent class in a different JAR file
*/
import java.util.jar.*;
import java.util.*;
import java.io.*;
import java.net.*;

public class ClassPathTest {

    JarFile jarFile;
    Manifest manifest;
    Attributes mainAttributes;
    Map map;
    URLClassLoader ucl;

    static class TestException extends RuntimeException {
        TestException(Throwable t) {
            super("URLClassLoader ClassPathTest failed with: " + t);
        }
    }

    public ClassPathTest() {
        File local = new File(System.getProperty("test.src", "."),
                              "jars/class_path_test.jar");
        String jarFileName = local.getPath();

        try {
            jarFile = new JarFile(jarFileName);
        }
        catch (IOException e) {
            System.err.println("Could not find jar file " + jarFileName);
            throw new TestException(e);
        }
        try {
            URL url = getUrl(new File(jarFileName));
            System.out.println("url: " + url);

            ucl = new URLClassLoader(new URL[] { url });

            // Moved this inside try block, as it may raise IOException.
            // (maddox)
            manifest = jarFile.getManifest();
        }
        catch (Exception e) {
            throw new TestException(e);
        }
        //manifest = jarFile.getManifest();
        mainAttributes = manifest.getMainAttributes();
        map = manifest.getEntries();

        Iterator it = map.entrySet().iterator();
        Class clazz = null;

        while (it.hasNext()) {
            Map.Entry e = (Map.Entry)it.next();
            Attributes a = (Attributes)e.getValue();

            Attributes.Name an = new Attributes.Name("Class-Path");
            if (a.containsKey(an)) {
                String val = a.getValue(an);
                if (val != null)
                    System.out.println("Class-Path: " + val);
            }

            if (a.containsKey(new Attributes.Name("Java-Bean"))) {

                String beanClassName = nameToClassName((String)e.getKey());
                System.out.println("JavaBean Class: " + beanClassName);

                try {
                    clazz = ucl.loadClass(beanClassName);
                }
                catch (Throwable t) {
                    throw new TestException(t);
                } if (clazz != null) {
                    try {
                        System.out.println("instantiating " + beanClassName);
                        clazz.newInstance();
                        System.out.println("done instantiating " +
                                           beanClassName);
                    } catch (Throwable t2) {
                        throw new TestException(t2);
                    }
                }
            }
        }
    }

    String nameToClassName(String key) {
        String key2 = key.replace('/', File.separatorChar);
        int li = key2.lastIndexOf(".class");
        key2 = key2.substring(0, li);
        return key2;
    }

    private static URL getUrl(File file) {
        String name;
        try {
            name = file.getCanonicalPath();
        } catch (IOException e) {
            name = file.getAbsolutePath();
        }
        name = name.replace(File.separatorChar, '/');
        if (!name.startsWith("/")) {
            name = "/" + name;
        }
        try {
            return new URL( "file:" + name);
        } catch (MalformedURLException e) {
            throw new TestException(e);
        }
    }

    public static void main(String args[]) {
        new ClassPathTest();
    }
}

quality87%

¤ Dauer der Verarbeitung: 0.13 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.