Method initClassLoader

java/org/apache/jasper/JspC.java:1802–1874

Initializes the classloader as/if needed for the given compilation context. @return the classloader that will be used @throws IOException If an error occurs

()

     * @throws IOException If an error occurs
     */
    protected ClassLoader initClassLoader() throws IOException {

        classPath = getClassPath();

        ClassLoader jspcLoader = getClass().getClassLoader();
        if (jspcLoader instanceof AntClassLoader) {
            classPath += File.pathSeparator + ((AntClassLoader) jspcLoader).getClasspath();
        }

        // Turn the classPath into URLs
        List<URL> urls = new ArrayList<>();
        StringTokenizer tokenizer = new StringTokenizer(classPath, File.pathSeparator);
        while (tokenizer.hasMoreTokens()) {
            String path = tokenizer.nextToken();
            try {
                File libFile = new File(path);
                urls.add(libFile.toURI().toURL());
            } catch (IOException ioe) {
                // Failing a toCanonicalPath on a file that
                // exists() should be a JVM regression test,
                // therefore we have permission to freak uot
                throw new RuntimeException(ioe.toString());
            }
        }

        File webappBase = new File(uriRoot);
        if (webappBase.exists()) {
            File classes = new File(webappBase, "/WEB-INF/classes");
            try {
                if (classes.exists()) {
                    classPath = classPath + File.pathSeparator + classes.getCanonicalPath();
                    urls.add(classes.getCanonicalFile().toURI().toURL());
                }
            } catch (IOException ioe) {
                // failing a toCanonicalPath on a file that
                // exists() should be a JVM regression test,
                // therefore we have permission to freak out
                throw new RuntimeException(ioe.toString());
            }
            File webinfLib = new File(webappBase, "/WEB-INF/lib");
            if (webinfLib.exists() && webinfLib.isDirectory()) {
                String[] libs = webinfLib.list();
                if (libs != null) {
                    for (String lib : libs) {
                        if (lib.length() < 5) {
                            continue;
                        }
                        String ext = lib.substring(lib.length() - 4);
                        if (!".jar".equalsIgnoreCase(ext)) {
                            if (".tld".equalsIgnoreCase(ext)) {
                                log.warn(Localizer.getMessage("jspc.warning.tldInWebInfLib"));
                            }
                            continue;
                        }
                        try {
                            File libFile = new File(webinfLib, lib);
                            classPath = classPath + File.pathSeparator + libFile.getAbsolutePath();
                            urls.add(libFile.getAbsoluteFile().toURI().toURL());