alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (CallerSensitiveFinder.java)

This example Java source code file (CallerSensitiveFinder.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, basicfileattributes, callersensitivefinder, constantpoolexception, executionexception, futuretask, interruptedexception, ioexception, list, override, path, referencefinder, runtimeexception, string, threading, threads, util

The CallerSensitiveFinder.java Java example source code

/*
 * Copyright (c) 2013, 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.
 */

import com.sun.tools.classfile.*;
import com.sun.tools.jdeps.ClassFileReader;
import static com.sun.tools.classfile.ConstantPool.*;
import java.io.File;
import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.FutureTask;

/*
 * @test
 * @bug 8010117
 * @summary Verify if CallerSensitive methods are annotated with
 *          sun.reflect.CallerSensitive annotation
 * @build CallerSensitiveFinder
 * @run main/othervm/timeout=900 -mx600m CallerSensitiveFinder
 */
public class CallerSensitiveFinder {
    private static int numThreads = 3;
    private static boolean verbose = false;
    public static void main(String[] args) throws Exception {
        List<Path> classes = new ArrayList<>();
        String testclasses = System.getProperty("test.classes", ".");
        int i = 0;
        while (i < args.length) {
            String arg = args[i++];
            if (arg.equals("-v")) {
                verbose = true;
            } else {
                Path p = Paths.get(testclasses, arg);
                if (!p.toFile().exists()) {
                    throw new IllegalArgumentException(arg + " does not exist");
                }
                classes.add(p);
            }
        }
        if (classes.isEmpty()) {
            classes.addAll(PlatformClassPath.getJREClasses());
        }
        CallerSensitiveFinder csfinder = new CallerSensitiveFinder();

        List<String> errors = csfinder.run(classes);
        if (!errors.isEmpty()) {
            throw new RuntimeException(errors.size() +
                    " caller-sensitive methods are missing @CallerSensitive annotation");
        }
    }

    private final List<String> csMethodsMissingAnnotation = new ArrayList<>();
    private final ReferenceFinder finder;
    public CallerSensitiveFinder() {
        this.finder = new ReferenceFinder(getFilter(), getVisitor());
    }

    private ReferenceFinder.Filter getFilter() {
        final String classname = "sun/reflect/Reflection";
        final String method = "getCallerClass";
        return new ReferenceFinder.Filter() {
            public boolean accept(ConstantPool cpool, CPRefInfo cpref) {
                try {
                    CONSTANT_NameAndType_info nat = cpref.getNameAndTypeInfo();
                    return cpref.getClassName().equals(classname) && nat.getName().equals(method);
                } catch (ConstantPoolException ex) {
                    throw new RuntimeException(ex);
                }
            }
        };
    }

    private ReferenceFinder.Visitor getVisitor() {
        return new ReferenceFinder.Visitor() {
            public void visit(ClassFile cf, Method m,  List<CPRefInfo> refs) {
                try {
                    String name = String.format("%s#%s %s", cf.getName(),
                                                m.getName(cf.constant_pool),
                                                m.descriptor.getValue(cf.constant_pool));
                    if (!CallerSensitiveFinder.isCallerSensitive(m, cf.constant_pool)) {
                        csMethodsMissingAnnotation.add(name);
                        System.err.println("Missing @CallerSensitive: " + name);
                    } else {
                        if (verbose) {
                            System.out.format("@CS  %s%n", name);
                        }
                    }
                } catch (ConstantPoolException ex) {
                    throw new RuntimeException(ex);
                }
            }
        };
    }

    public List<String> run(List classes) throws IOException, InterruptedException,
            ExecutionException, ConstantPoolException
    {
        ExecutorService pool = Executors.newFixedThreadPool(numThreads);
        for (Path path : classes) {
            ClassFileReader reader = ClassFileReader.newInstance(path);
            for (ClassFile cf : reader.getClassFiles()) {
                String classFileName = cf.getName();
                // for each ClassFile
                //    parse constant pool to find matching method refs
                //      parse each method (caller)
                //      - visit and find method references matching the given method name
                pool.submit(getTask(cf));
            }
        }
        waitForCompletion();
        pool.shutdown();
        return csMethodsMissingAnnotation;
    }

    private static final String CALLER_SENSITIVE_ANNOTATION = "Lsun/reflect/CallerSensitive;";
    private static boolean isCallerSensitive(Method m, ConstantPool cp)
            throws ConstantPoolException
    {
        RuntimeAnnotations_attribute attr =
            (RuntimeAnnotations_attribute)m.attributes.get(Attribute.RuntimeVisibleAnnotations);
        int index = 0;
        if (attr != null) {
            for (int i = 0; i < attr.annotations.length; i++) {
                Annotation ann = attr.annotations[i];
                String annType = cp.getUTF8Value(ann.type_index);
                if (CALLER_SENSITIVE_ANNOTATION.equals(annType)) {
                    return true;
                }
            }
        }
        return false;
    }

    private final List<FutureTask tasks = new ArrayList>();
    private FutureTask<Void> getTask(final ClassFile cf) {
        FutureTask<Void> task = new FutureTask(new Callable() {
            public Void call() throws Exception {
                finder.parse(cf);
                return null;
            }
        });
        tasks.add(task);
        return task;
    }

    private void waitForCompletion() throws InterruptedException, ExecutionException {
        for (FutureTask<Void> t : tasks) {
            t.get();
        }
        System.out.println("Parsed " + tasks.size() + " classfiles");
    }

    static class PlatformClassPath {
        static List<Path> getJREClasses() throws IOException {
            List<Path> result = new ArrayList();
            Path home = Paths.get(System.getProperty("java.home"));

            if (home.endsWith("jre")) {
                // jar files in <javahome>/jre/lib
                // skip <javahome>/lib
                result.addAll(addJarFiles(home.resolve("lib")));
            } else if (home.resolve("lib").toFile().exists()) {
                // either a JRE or a jdk build image
                File classes = home.resolve("classes").toFile();
                if (classes.exists() && classes.isDirectory()) {
                    // jdk build outputdir
                    result.add(classes.toPath());
                }
                // add other JAR files
                result.addAll(addJarFiles(home.resolve("lib")));
            } else {
                throw new RuntimeException("\"" + home + "\" not a JDK home");
            }
            return result;
        }

        static List<Path> addJarFiles(final Path root) throws IOException {
            final List<Path> result = new ArrayList();
            final Path ext = root.resolve("ext");
            Files.walkFileTree(root, new SimpleFileVisitor<Path>() {
                @Override
                public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs)
                        throws IOException {
                    if (dir.equals(root) || dir.equals(ext)) {
                        return FileVisitResult.CONTINUE;
                    } else {
                        // skip other cobundled JAR files
                        return FileVisitResult.SKIP_SUBTREE;
                    }
                }

                @Override
                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
                        throws IOException {
                    File f = file.toFile();
                    String fn = f.getName();
                    // parse alt-rt.jar as well
                    if (fn.endsWith(".jar") && !fn.equals("jfxrt.jar")) {
                        result.add(file);
                    }
                    return FileVisitResult.CONTINUE;
                }
            });
            return result;
        }
    }
}

Other Java examples (source code examples)

Here is a short list of links related to this Java CallerSensitiveFinder.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2024 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.