JDK 17 jdk.jartool.jmod is the JMOD file for JDK 17 JAR tool, which can be invoked by the "jar" command.

JDK 17 JAR tool compiled class files are stored in \fyicenter\jdk-17.0.5\jmods\jdk.jartool.jmod.

JDK 17 JAR tool compiled class files are also linked and stored in the \fyicenter\jdk-17.0.5\lib\modules JImage file.

JDK 17 JAR tool source code files are stored in \fyicenter\jdk-17.0.5\lib\src.zip\jdk.jartool.

You can click and view the content of each source code file in the list below.

⏎ sun/tools/jar/Validator.java

/*
 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
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 *
 *
 *
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 *
 *
 *
 *
 *
 */

package sun.tools.jar;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.lang.module.ModuleDescriptor;
import java.lang.module.ModuleDescriptor.Exports;
import java.lang.module.ModuleDescriptor.Opens;
import java.lang.module.ModuleDescriptor.Provides;
import java.lang.module.ModuleDescriptor.Requires;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import static java.util.jar.JarFile.MANIFEST_NAME;
import static sun.tools.jar.Main.VERSIONS_DIR;
import static sun.tools.jar.Main.VERSIONS_DIR_LENGTH;
import static sun.tools.jar.Main.MODULE_INFO;
import static sun.tools.jar.Main.getMsg;
import static sun.tools.jar.Main.formatMsg;
import static sun.tools.jar.Main.formatMsg2;
import static sun.tools.jar.Main.toBinaryName;

final class Validator {

    private final Map<String,FingerPrint> classes = new HashMap<>();
    private final Main main;
    private final ZipFile zf;
    private boolean isValid = true;
    private Set<String> concealedPkgs = Collections.emptySet();
    private ModuleDescriptor md;
    private String mdName;

    private Validator(Main main, ZipFile zf) {
        this.main = main;
        this.zf = zf;
        checkModuleDescriptor(MODULE_INFO);
    }

    static boolean validate(Main main, ZipFile zf) throws IOException {
        return new Validator(main, zf).validate();
    }

    private boolean validate() {
        try {
            zf.stream()
              .filter(e -> e.getName().endsWith(".class"))
              .map(this::getFingerPrint)
              .filter(FingerPrint::isClass)    // skip any non-class entry
              .collect(Collectors.groupingBy(
                      FingerPrint::mrversion,
                      TreeMap::new,
                      Collectors.toMap(FingerPrint::className,
                                       Function.identity(),
                                       this::sameNameFingerPrint)))
              .forEach((version, entries) -> {
                      if (version == 0)
                          validateBase(entries);
                      else
                          validateVersioned(entries);
                  });
        } catch (InvalidJarException e) {
            errorAndInvalid(e.getMessage());
        }
        return isValid;
    }

    static class InvalidJarException extends RuntimeException {
        private static final long serialVersionUID = -3642329147299217726L;
        InvalidJarException(String msg) {
            super(msg);
        }
    }

    private FingerPrint sameNameFingerPrint(FingerPrint fp1, FingerPrint fp2) {
        checkClassName(fp1);
        checkClassName(fp2);
        // entries/classes with same name, return fp2 for now ?
        return fp2;
    }

    private FingerPrint getFingerPrint(ZipEntry ze) {
        // figure out the version and basename from the ZipEntry
        String ename = ze.getName();
        String bname = ename;
        int version = 0;

        if (ename.startsWith(VERSIONS_DIR)) {
            int n = ename.indexOf("/", VERSIONS_DIR_LENGTH);
            if (n == -1) {
                throw new InvalidJarException(
                    formatMsg("error.validator.version.notnumber", ename));
            }
            try {
                version = Integer.parseInt(ename, VERSIONS_DIR_LENGTH, n, 10);
            } catch (NumberFormatException x) {
                throw new InvalidJarException(
                    formatMsg("error.validator.version.notnumber", ename));
            }
            if (n == ename.length()) {
                throw new InvalidJarException(
                    formatMsg("error.validator.entryname.tooshort", ename));
            }
            bname = ename.substring(n + 1);
        }

        // return the cooresponding fingerprint entry
        try (InputStream is = zf.getInputStream(ze)) {
            return new FingerPrint(bname, ename, version, is.readAllBytes());
        } catch (IOException x) {
           throw new InvalidJarException(x.getMessage());
        }
    }

    /*
     *  Validates (a) if there is any isolated nested class, and (b) if the
     *  class name in class file (by asm) matches the entry's basename.
     */
    public void validateBase(Map<String, FingerPrint> fps) {
        fps.values().forEach( fp -> {
            if (!checkClassName(fp)) {
                return;
            }
            if (fp.isNestedClass()) {
                checkNestedClass(fp, fps);
            }
            classes.put(fp.className(), fp);
        });
    }

    public void validateVersioned(Map<String, FingerPrint> fps) {

        fps.values().forEach( fp -> {

            // validate the versioned module-info
            if (MODULE_INFO.equals(fp.basename())) {
                checkModuleDescriptor(fp.entryName());
                return;
            }
            // process a versioned entry, look for previous entry with same name
            FingerPrint matchFp = classes.get(fp.className());
            if (matchFp == null) {
                // no match found
                if (fp.isNestedClass()) {
                    checkNestedClass(fp, fps);
                    return;
                }
                if (fp.isPublicClass()) {
                    if (!isConcealed(fp.className())) {
                        errorAndInvalid(formatMsg("error.validator.new.public.class",
                                                  fp.entryName()));
                        return;
                     }
                     // entry is a public class entry in a concealed package
                     warn(formatMsg("warn.validator.concealed.public.class",
                                   fp.entryName()));
                }
                classes.put(fp.className(), fp);
                return;
            }

            // are the two classes/resources identical?
            if (fp.isIdentical(matchFp)) {
                warn(formatMsg("warn.validator.identical.entry", fp.entryName()));
                return;    // it's okay, just takes up room
            }

            // ok, not identical, check for compatible class version and api
            if (fp.isNestedClass()) {
                checkNestedClass(fp, fps);
                return;    // fall through, need check nested public class??
            }
            if (!fp.isCompatibleVersion(matchFp)) {
                errorAndInvalid(formatMsg("error.validator.incompatible.class.version",
                                          fp.entryName()));
                return;
            }
            if (!fp.isSameAPI(matchFp)) {
                errorAndInvalid(formatMsg("error.validator.different.api",
                                          fp.entryName()));
                return;
            }
            if (!checkClassName(fp)) {
                return;
            }
            classes.put(fp.className(), fp);

            return;
        });
    }

    /*
     * Checks whether or not the given versioned module descriptor's attributes
     * are valid when compared against the root/base module descriptor.
     *
     * A versioned module descriptor must be identical to the root/base module
     * descriptor, with two exceptions:
     *  - A versioned descriptor can have different non-public `requires`
     *    clauses of platform ( `java.*` and `jdk.*` ) modules, and
     *  - A versioned descriptor can have different `uses` clauses, even of
    *    service types defined outside of the platform modules.
     */
    private void checkModuleDescriptor(String miName) {
        ZipEntry ze = zf.getEntry(miName);
        if (ze != null) {
            try (InputStream jis = zf.getInputStream(ze)) {
                ModuleDescriptor md = ModuleDescriptor.read(jis);
                // Initialize the base md if it's not yet. A "base" md can be either the
                // root module-info.class or the first versioned module-info.class
                ModuleDescriptor base = this.md;

                if (base == null) {
                    concealedPkgs = new HashSet<>(md.packages());
                    md.exports().stream().map(Exports::source).forEach(concealedPkgs::remove);
                    md.opens().stream().map(Opens::source).forEach(concealedPkgs::remove);
                    // must have the implementation class of the services it 'provides'.
                    if (md.provides().stream().map(Provides::providers)
                          .flatMap(List::stream)
                          .filter(p -> zf.getEntry(toBinaryName(p)) == null)
                          .peek(p -> error(formatMsg("error.missing.provider", p)))
                          .count() != 0) {
                        isValid = false;
                        return;
                    }
                    this.md = md;
                    this.mdName = miName;
                    return;
                }

                if (!base.name().equals(md.name())) {
                    errorAndInvalid(getMsg("error.validator.info.name.notequal"));
                }
                if (!base.requires().equals(md.requires())) {
                    Set<Requires> baseRequires = base.requires();
                    for (Requires r : md.requires()) {
                        if (baseRequires.contains(r))
                            continue;
                        if (r.modifiers().contains(Requires.Modifier.TRANSITIVE)) {
                            errorAndInvalid(getMsg("error.validator.info.requires.transitive"));
                        } else if (!isPlatformModule(r.name())) {
                            errorAndInvalid(getMsg("error.validator.info.requires.added"));
                        }
                    }
                    for (Requires r : baseRequires) {
                        Set<Requires> mdRequires = md.requires();
                        if (mdRequires.contains(r))
                            continue;
                        if (!isPlatformModule(r.name())) {
                            errorAndInvalid(getMsg("error.validator.info.requires.dropped"));
                        }
                    }
                }
                if (!base.exports().equals(md.exports())) {
                    errorAndInvalid(getMsg("error.validator.info.exports.notequal"));
                }
                if (!base.opens().equals(md.opens())) {
                    errorAndInvalid(getMsg("error.validator.info.opens.notequal"));
                }
                if (!base.provides().equals(md.provides())) {
                    errorAndInvalid(getMsg("error.validator.info.provides.notequal"));
                }
                if (!base.mainClass().equals(md.mainClass())) {
                    errorAndInvalid(formatMsg("error.validator.info.manclass.notequal",
                                              ze.getName()));
                }
                if (!base.version().equals(md.version())) {
                    errorAndInvalid(formatMsg("error.validator.info.version.notequal",
                                              ze.getName()));
                }
            } catch (Exception x) {
                errorAndInvalid(x.getMessage() + " : " + miName);
            }
        }
    }

    private boolean checkClassName(FingerPrint fp) {
        if (fp.className().equals(className(fp.basename()))) {
            return true;
        }
        error(formatMsg2("error.validator.names.mismatch",
                         fp.entryName(), fp.className().replace("/", ".")));
        return isValid = false;
    }

    private boolean checkNestedClass(FingerPrint fp, Map<String, FingerPrint> outerClasses) {
        if (outerClasses.containsKey(fp.outerClassName())) {
            return true;
        }
        // outer class was not available

        error(formatMsg("error.validator.isolated.nested.class", fp.entryName()));
        return isValid = false;
    }

    private boolean isConcealed(String className) {
        if (concealedPkgs.isEmpty()) {
            return false;
        }
        int idx = className.lastIndexOf('/');
        String pkgName = idx != -1 ? className.substring(0, idx).replace('/', '.') : "";
        return concealedPkgs.contains(pkgName);
    }

    private static boolean isPlatformModule(String name) {
        return name.startsWith("java.") || name.startsWith("jdk.");
    }

    private static String className(String entryName) {
        return entryName.endsWith(".class") ? entryName.substring(0, entryName.length() - 6) : null;
    }

    private void error(String msg) {
        main.error(msg);
    }

    private void errorAndInvalid(String msg) {
        main.error(msg);
        isValid = false;
    }

    private void warn(String msg) {
        main.warn(msg);
    }
}

⏎ sun/tools/jar/Validator.java

Or download all of them as a single archive file:

File name: jdk.jartool-17.0.5-src.zip
File size: 103933 bytes
Release date: 2022-09-13
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