JDK 11 jdk.javadoc.jmod - Java Document Tool

JDK 11 jdk.javadoc.jmod is the JMOD file for JDK 11 Java Document tool, which can be invoked by the "javadoc" command.

JDK 11 Java Document tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.javadoc.jmod.

JDK 11 Java Document tool compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Java Document tool source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.javadoc.

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

✍: FYIcenter

jdk/javadoc/internal/doclets/formats/html/HtmlConfiguration.java

/*
 * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package jdk.javadoc.internal.doclets.formats.html;

import java.net.*;
import java.util.*;
import java.util.stream.Collectors;

import javax.lang.model.element.Element;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;

import com.sun.source.util.DocTreePath;
import com.sun.tools.doclint.DocLint;

import jdk.javadoc.doclet.Doclet;
import jdk.javadoc.doclet.DocletEnvironment;
import jdk.javadoc.internal.doclets.formats.html.markup.HtmlConstants;
import jdk.javadoc.internal.doclets.formats.html.markup.HtmlTag;
import jdk.javadoc.internal.doclets.formats.html.markup.HtmlVersion;
import jdk.javadoc.internal.doclets.toolkit.BaseConfiguration;
import jdk.javadoc.internal.doclets.toolkit.Content;
import jdk.javadoc.internal.doclets.toolkit.DocletException;
import jdk.javadoc.internal.doclets.toolkit.Messages;
import jdk.javadoc.internal.doclets.toolkit.Resources;
import jdk.javadoc.internal.doclets.toolkit.WriterFactory;
import jdk.javadoc.internal.doclets.toolkit.util.DocFile;
import jdk.javadoc.internal.doclets.toolkit.util.DocPath;
import jdk.javadoc.internal.doclets.toolkit.util.DocPaths;
import jdk.javadoc.internal.doclets.toolkit.util.Utils;

import static javax.tools.Diagnostic.Kind.*;

/**
 * Configure the output based on the command line options.
 * <p>
 * Also determine the length of the command line option. For example,
 * for a option "-header" there will be a string argument associated, then the
 * the length of option "-header" is two. But for option "-nohelp" no argument
 * is needed so it's length is 1.
 * </p>
 * <p>
 * Also do the error checking on the options used. For example it is illegal to
 * use "-helpfile" option when already "-nohelp" option is used.
 * </p>
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 *
 * @author Robert Field.
 * @author Atul Dambalkar.
 * @author Jamie Ho
 * @author Bhavesh Patel (Modified)
 */
public class HtmlConfiguration extends BaseConfiguration {

    /**
     * Argument for command line option "-header".
     */
    public String header = "";

    /**
     * Argument for command line option "-packagesheader".
     */
    public String packagesheader = "";

    /**
     * Argument for command line option "-footer".
     */
    public String footer = "";

    /**
     * Argument for command line option "-doctitle".
     */
    public String doctitle = "";

    /**
     * Argument for command line option "-windowtitle".
     */
    public String windowtitle = "";

    /**
     * Argument for command line option "-top".
     */
    public String top = "";

    /**
     * Argument for command line option "-bottom".
     */
    public String bottom = "";

    /**
     * Argument for command line option "-helpfile".
     */
    public String helpfile = "";

    /**
     * Argument for command line option "-stylesheetfile".
     */
    public String stylesheetfile = "";

    /**
     * Argument for command line option "--add-stylesheet".
     */
    public List<String> additionalStylesheets = new ArrayList<>();

    /**
     * Argument for command line option "-Xdocrootparent".
     */
    public String docrootparent = "";

    /**
     * True if command line option "-nohelp" is used. Default value is false.
     */
    public boolean nohelp = false;

    /**
     * True if command line option "-splitindex" is used. Default value is
     * false.
     */
    public boolean splitindex = false;

    /**
     * False if command line option "-noindex" is used. Default value is true.
     */
    public boolean createindex = true;

    /**
     * True if command line option "-use" is used. Default value is false.
     */
    public boolean classuse = false;

    /**
     * False if command line option "-notree" is used. Default value is true.
     */
    public boolean createtree = true;

    /**
     * The META charset tag used for cross-platform viewing.
     */
    public String charset = null;

    /**
     * True if command line option "-nodeprecated" is used. Default value is
     * false.
     */
    public boolean nodeprecatedlist = false;

    /**
     * True if command line option "-nonavbar" is used. Default value is false.
     */
    public boolean nonavbar = false;

    /**
     * True if command line option "-nooverview" is used. Default value is
     * false
     */
    private boolean nooverview = false;

    /**
     * The overview path specified with "-overview" flag.
     */
    public String overviewpath = null;

    /**
     * This is true if option "-overview" is used or option "-overview" is not
     * used and number of packages is more than one.
     */
    public boolean createoverview = false;

    /**
     * Specifies whether or not frames should be generated.
     * Defaults to false; can be set to true by --frames; can be set to false by --no-frames; last one wins.
     */
    public boolean frames = false;

    /**
     * This is the HTML version of the generated pages.
     * The default value is determined later.
     */
    public HtmlVersion htmlVersion = null;

    /**
     * Flag to enable/disable use of module directories when generating docs for modules
     * Default: on (module directories are enabled).
     */
    public boolean useModuleDirectories = true;

    /**
     * Collected set of doclint options
     */
    public Map<Doclet.Option, String> doclintOpts = new LinkedHashMap<>();

    public final Resources resources;

    /**
     * First file to appear in the right-hand frame in the generated
     * documentation.
     */
    public DocPath topFile = DocPath.empty;

    /**
     * The TypeElement for the class file getting generated.
     */
    public TypeElement currentTypeElement = null;  // Set this TypeElement in the ClassWriter.

    protected SortedSet<SearchIndexItem> memberSearchIndex;

    protected SortedSet<SearchIndexItem> moduleSearchIndex;

    protected SortedSet<SearchIndexItem> packageSearchIndex;

    protected SortedSet<SearchIndexItem> tagSearchIndex;

    protected SortedSet<SearchIndexItem> typeSearchIndex;

    protected Map<Character,List<SearchIndexItem>> tagSearchIndexMap = new HashMap<>();

    protected Set<Character> tagSearchIndexKeys;

    public final Contents contents;

    protected final Messages messages;

    public DocPaths docPaths;

    /**
     * Creates an object to hold the configuration for a doclet.
     *
     * @param doclet the doclet
     */
    public HtmlConfiguration(Doclet doclet) {
        super(doclet);
        resources = new Resources(this,
                BaseConfiguration.sharedResourceBundleName,
                "jdk.javadoc.internal.doclets.formats.html.resources.standard");

        messages = new Messages(this);
        contents = new Contents(this);

        String v;
        try {
            ResourceBundle rb = ResourceBundle.getBundle(versionBundleName, getLocale());
            try {
                v = rb.getString("release");
            } catch (MissingResourceException e) {
                v = defaultDocletVersion;
            }
        } catch (MissingResourceException e) {
            v = defaultDocletVersion;
        }
        docletVersion = v;
    }

    private static final String versionBundleName = "jdk.javadoc.internal.tool.resources.version";
    private static final String defaultDocletVersion = System.getProperty("java.version");
    public final String docletVersion;

    @Override
    public String getDocletVersion() {
        return docletVersion;
    }

    @Override
    public Resources getResources() {
        return resources;
    }

    @Override
    public Messages getMessages() {
        return messages;
    }

    protected boolean validateOptions() {
        // check shared options
        if (!generalValidOptions()) {
            return false;
        }

        if (htmlVersion == null) {
            htmlVersion = HtmlVersion.HTML5;
        }

        // check if helpfile exists
        if (!helpfile.isEmpty()) {
            DocFile help = DocFile.createFileForInput(this, helpfile);
            if (!help.exists()) {
                reporter.print(ERROR, getText("doclet.File_not_found", helpfile));
                return false;
            }
        }
        // check if stylesheetfile exists
        if (!stylesheetfile.isEmpty()) {
            DocFile stylesheet = DocFile.createFileForInput(this, stylesheetfile);
            if (!stylesheet.exists()) {
                reporter.print(ERROR, getText("doclet.File_not_found", stylesheetfile));
                return false;
            }
        }
        // check if additional stylesheets exists
        for (String ssheet : additionalStylesheets) {
            DocFile ssfile = DocFile.createFileForInput(this, ssheet);
            if (!ssfile.exists()) {
                reporter.print(ERROR, getText("doclet.File_not_found", ssheet));
                return false;
            }
        }

        // In a more object-oriented world, this would be done by methods on the Option objects.
        // Note that -windowtitle silently removes any and all HTML elements, and so does not need
        // to be handled here.
        utils.checkJavaScriptInOption("-header", header);
        utils.checkJavaScriptInOption("-footer", footer);
        utils.checkJavaScriptInOption("-top", top);
        utils.checkJavaScriptInOption("-bottom", bottom);
        utils.checkJavaScriptInOption("-doctitle", doctitle);
        utils.checkJavaScriptInOption("-packagesheader", packagesheader);

        return true;
    }


    @Override
    public boolean finishOptionSettings() {
        if (!validateOptions()) {
            return false;
        }
        if (!getSpecifiedTypeElements().isEmpty()) {
            Map<String, PackageElement> map = new HashMap<>();
            PackageElement pkg;
            for (TypeElement aClass : getIncludedTypeElements()) {
                pkg = utils.containingPackage(aClass);
                if (!map.containsKey(utils.getPackageName(pkg))) {
                    map.put(utils.getPackageName(pkg), pkg);
                }
            }
        }
        docPaths = new DocPaths(utils, useModuleDirectories);
        setCreateOverview();
        setTopFile(docEnv);
        workArounds.initDocLint(doclintOpts.values(), tagletManager.getAllTagletNames(),
                Utils.toLowerCase(htmlVersion.name()));
        return true;
    }

    /**
     * Return true if the generated output is HTML5.
     */
    public boolean isOutputHtml5() {
        return htmlVersion == HtmlVersion.HTML5;
    }

    /**
     * Return true if the tag is allowed for this specific version of HTML.
     */
    public boolean allowTag(HtmlTag htmlTag) {
        return htmlTag.allowTag(this.htmlVersion);
    }

    /**
     * Decide the page which will appear first in the right-hand frame. It will
     * be "overview-summary.html" if "-overview" option is used or no
     * "-overview" but the number of packages is more than one. It will be
     * "package-summary.html" of the respective package if there is only one
     * package to document. It will be a class page(first in the sorted order),
     * if only classes are provided on the command line.
     *
     * @param docEnv the doclet environment
     */
    protected void setTopFile(DocletEnvironment docEnv) {
        if (!checkForDeprecation(docEnv)) {
            return;
        }
        if (createoverview) {
            topFile = DocPaths.overviewSummary(frames);
        } else {
            if (showModules) {
                topFile = DocPath.empty.resolve(docPaths.moduleSummary(modules.first()));
            } else if (packages.size() == 1 && packages.first().isUnnamed()) {
                List<TypeElement> classes = new ArrayList<>(getIncludedTypeElements());
                if (!classes.isEmpty()) {
                    TypeElement te = getValidClass(classes);
                    topFile = docPaths.forClass(te);
                }
            } else if (!packages.isEmpty()) {
                topFile = docPaths.forPackage(packages.first()).resolve(DocPaths.PACKAGE_SUMMARY);
            }
        }
    }

    protected TypeElement getValidClass(List<TypeElement> classes) {
        if (!nodeprecated) {
            return classes.get(0);
        }
        for (TypeElement te : classes) {
            if (!utils.isDeprecated(te)) {
                return te;
            }
        }
        return null;
    }

    protected boolean checkForDeprecation(DocletEnvironment docEnv) {
        for (TypeElement te : getIncludedTypeElements()) {
            if (isGeneratedDoc(te)) {
                return true;
            }
        }
        return false;
    }

    /**
     * Generate "overview.html" page if option "-overview" is used or number of
     * packages is more than one. Sets {@link #createoverview} field to true.
     */
    protected void setCreateOverview() {
        if (!nooverview) {
            if (overviewpath != null
                    || modules.size() > 1
                    || (modules.isEmpty() && packages.size() > 1)) {
                createoverview = true;
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public WriterFactory getWriterFactory() {
        return new WriterFactoryImpl(this);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Locale getLocale() {
        if (locale == null)
            return Locale.getDefault();
        return locale;
    }

    /**
     * Return the path of the overview file or null if it does not exist.
     *
     * @return the path of the overview file or null if it does not exist.
     */
    @Override
    public JavaFileObject getOverviewPath() {
        if (overviewpath != null && getFileManager() instanceof StandardJavaFileManager) {
            StandardJavaFileManager fm = (StandardJavaFileManager) getFileManager();
            return fm.getJavaFileObjects(overviewpath).iterator().next();
        }
        return null;
    }

    public DocFile getMainStylesheet() {
        return stylesheetfile.isEmpty() ? null : DocFile.createFileForInput(this, stylesheetfile);
    }

    public List<DocFile> getAdditionalStylesheets() {
        return additionalStylesheets.stream()
                .map(ssf -> DocFile.createFileForInput(this, ssf))
                .collect(Collectors.toList());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public JavaFileManager getFileManager() {
        return docEnv.getJavaFileManager();
    }

    @Override
    public boolean showMessage(DocTreePath path, String key) {
        return (path == null || workArounds.haveDocLint());
    }

    @Override
    public boolean showMessage(Element e, String key) {
        return (e == null || workArounds.haveDocLint());
    }

    @Override
    public String getText(String key) {
        return resources.getText(key);
    }

    @Override
    public String getText(String key, String... args) {
        return resources.getText(key, (Object[]) args);
    }

   /**
     * {@inheritdoc}
     */
    @Override
    public Content getContent(String key) {
        return contents.getContent(key);
    }

    /**
     * Get the configuration string as a content.
     *
     * @param key the key to look for in the configuration file
     * @param o   string or content argument added to configuration text
     * @return a content tree for the text
     */
    @Override
    public Content getContent(String key, Object o) {
        return contents.getContent(key, o);
    }

    /**
     * Get the configuration string as a content.
     *
     * @param key the key to look for in the configuration file
     * @param o1 resource argument
     * @param o2 resource argument
     * @return a content tree for the text
     */
    @Override
    public Content getContent(String key, Object o1, Object o2) {
        return contents.getContent(key, o1, o2);
    }

    /**
     * Get the configuration string as a content.
     *
     * @param key the key to look for in the configuration file
     * @param o0  string or content argument added to configuration text
     * @param o1  string or content argument added to configuration text
     * @param o2  string or content argument added to configuration text
     * @return a content tree for the text
     */
    @Override
    public Content getContent(String key, Object o0, Object o1, Object o2) {
        return contents.getContent(key, o0, o1, o2);
    }

    protected void buildSearchTagIndex() {
        for (SearchIndexItem sii : tagSearchIndex) {
            String tagLabel = sii.getLabel();
            Character unicode = (tagLabel.length() == 0)
                    ? '*'
                    : Character.toUpperCase(tagLabel.charAt(0));
            List<SearchIndexItem> list = tagSearchIndexMap.get(unicode);
            if (list == null) {
                list = new ArrayList<>();
                tagSearchIndexMap.put(unicode, list);
            }
            list.add(sii);
        }
        tagSearchIndexKeys = tagSearchIndexMap.keySet();
    }

    @Override
    public Set<Doclet.Option> getSupportedOptions() {
        Resources resources = getResources();
        Doclet.Option[] options = {
            new Option(resources, "--add-stylesheet", 1) {
                @Override
                public boolean process(String opt, List<String> args) {
                    additionalStylesheets.add(args.get(0));
                    return true;
                }
            },
            new Option(resources, "-bottom", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    bottom = args.get(0);
                    return true;
                }
            },
            new Option(resources, "-charset", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    charset = args.get(0);
                    return true;
                }
            },
            new Option(resources, "-doctitle", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    doctitle = args.get(0);
                    return true;
                }
            },
            new Option(resources, "-footer", 1) {
                @Override
                public boolean process(String opt, List<String> args) {
                    footer = args.get(0);
                    return true;
                }
            },
            new Option(resources, "-header", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    header = args.get(0);
                    return true;
                }
            },
            new Option(resources, "-helpfile", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    if (nohelp == true) {
                        reporter.print(ERROR, getText("doclet.Option_conflict",
                                "-helpfile", "-nohelp"));
                        return false;
                    }
                    if (!helpfile.isEmpty()) {
                        reporter.print(ERROR, getText("doclet.Option_reuse",
                                "-helpfile"));
                        return false;
                    }
                    helpfile = args.get(0);
                    return true;
                }
            },
            new Option(resources, "-html4") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    reporter.print(WARNING, getText("doclet.HTML_4_specified", helpfile));
                    htmlVersion = HtmlVersion.HTML4;
                    return true;
                }
            },
            new Option(resources, "-html5") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    htmlVersion = HtmlVersion.HTML5;
                    return true;
                }
            },
            new Option(resources, "-nohelp") {
                @Override
                public boolean process(String opt, List<String> args) {
                    nohelp = true;
                    if (!helpfile.isEmpty()) {
                        reporter.print(ERROR, getText("doclet.Option_conflict",
                                "-nohelp", "-helpfile"));
                        return false;
                    }
                    return true;
                }
            },
            new Option(resources, "-nodeprecatedlist") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    nodeprecatedlist = true;
                    return true;
                }
            },
            new Option(resources, "-noindex") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    createindex = false;
                    if (splitindex == true) {
                        reporter.print(ERROR, getText("doclet.Option_conflict",
                                "-noindex", "-splitindex"));
                        return false;
                    }
                    return true;
                }
            },
            new Option(resources, "-nonavbar") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    nonavbar = true;
                    return true;
                }
            },
            new Hidden(resources, "-nooverview") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    nooverview = true;
                    if (overviewpath != null) {
                        reporter.print(ERROR, getText("doclet.Option_conflict",
                                "-nooverview", "-overview"));
                        return false;
                    }
                    return true;
                }
            },
            new Option(resources, "-notree") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    createtree = false;
                    return true;
                }
            },
            new Option(resources, "-overview", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    overviewpath = args.get(0);
                    if (nooverview == true) {
                        reporter.print(ERROR, getText("doclet.Option_conflict",
                                "-overview", "-nooverview"));
                        return false;
                    }
                    return true;
                }
            },
            new Option(resources, "--frames") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    reporter.print(WARNING, getText("doclet.Frames_specified", helpfile));
                    frames = true;
                    return true;
                }
            },
            new Option(resources, "--no-frames") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    frames = false;
                    return true;
                }
            },
            new Hidden(resources, "-packagesheader", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    packagesheader = args.get(0);
                    return true;
                }
            },
            new Option(resources, "-splitindex") {
                @Override
                public boolean process(String opt, List<String> args) {
                    splitindex = true;
                    if (createindex == false) {
                        reporter.print(ERROR, getText("doclet.Option_conflict",
                                "-splitindex", "-noindex"));
                        return false;
                    }
                    return true;
                }
            },
            new Option(resources, "--main-stylesheet -stylesheetfile", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    stylesheetfile = args.get(0);
                    return true;
                }
            },
            new Option(resources, "-top", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    top = args.get(0);
                    return true;
                }
            },
            new Option(resources, "-use") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    classuse = true;
                    return true;
                }
            },
            new Option(resources, "-windowtitle", 1) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    windowtitle = args.get(0).replaceAll("\\<.*?>", "");
                    return true;
                }
            },
            new XOption(resources, "-Xdoclint") {
                @Override
                public boolean process(String opt,  List<String> args) {
                    doclintOpts.put(this, DocLint.XMSGS_OPTION);
                    return true;
                }
            },
            new XOption(resources, "-Xdocrootparent", 1) {
                @Override
                public boolean process(String opt, List<String> args) {
                    docrootparent = args.get(0);
                    try {
                        URL ignored = new URL(docrootparent);
                    } catch (MalformedURLException e) {
                        reporter.print(ERROR, getText("doclet.MalformedURL", docrootparent));
                        return false;
                    }
                    return true;
                }
            },
            new XOption(resources, "doclet.usage.xdoclint-extended", "-Xdoclint:", 0) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    String dopt = opt.replace("-Xdoclint:", DocLint.XMSGS_CUSTOM_PREFIX);
                    doclintOpts.put(this, dopt);
                    if (dopt.contains("/")) {
                        reporter.print(ERROR, getText("doclet.Option_doclint_no_qualifiers"));
                        return false;
                    }
                    if (!DocLint.isValidOption(dopt)) {
                        reporter.print(ERROR, getText("doclet.Option_doclint_invalid_arg"));
                        return false;
                    }
                    return true;
                }
            },
            new XOption(resources, "doclet.usage.xdoclint-package", "-Xdoclint/package:", 0) {
                @Override
                public boolean process(String opt,  List<String> args) {
                    String dopt = opt.replace("-Xdoclint/package:", DocLint.XCHECK_PACKAGE);
                    doclintOpts.put(this, dopt);
                    if (!DocLint.isValidOption(dopt)) {
                        reporter.print(ERROR, getText("doclet.Option_doclint_package_invalid_arg"));
                        return false;
                    }
                    return true;
                }
            },
            new XOption(resources, "--no-module-directories") {
                @Override
                public boolean process(String option, List<String> args) {
                    useModuleDirectories = false;
                    return true;
                }
            }
        };
        Set<Doclet.Option> oset = new TreeSet<>();
        oset.addAll(Arrays.asList(options));
        oset.addAll(super.getSupportedOptions());
        return oset;
    }

    @Override
    protected boolean finishOptionSettings0() throws DocletException {
        if (docencoding == null) {
            if (charset == null) {
                docencoding = charset = (encoding == null) ? HtmlConstants.HTML_DEFAULT_CHARSET : encoding;
            } else {
                docencoding = charset;
            }
        } else {
            if (charset == null) {
                charset = docencoding;
            } else if (!charset.equals(docencoding)) {
                reporter.print(ERROR, getText("doclet.Option_conflict", "-charset", "-docencoding"));
                return false;
            }
        }
        return super.finishOptionSettings0();
    }

    @Override
    protected void initConfiguration(DocletEnvironment docEnv) {
        super.initConfiguration(docEnv);
        memberSearchIndex = new TreeSet<>(utils.makeGenericSearchIndexComparator());
        moduleSearchIndex = new TreeSet<>(utils.makeGenericSearchIndexComparator());
        packageSearchIndex = new TreeSet<>(utils.makeGenericSearchIndexComparator());
        tagSearchIndex = new TreeSet<>(utils.makeGenericSearchIndexComparator());
        typeSearchIndex = new TreeSet<>(utils.makeTypeSearchIndexComparator());
    }
}

jdk/javadoc/internal/doclets/formats/html/HtmlConfiguration.java

 

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