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 * Copyright (c) 2003, 2020, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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
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 */

package jdk.javadoc.internal.doclets.toolkit;

import java.util.Map;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.function.Function;

import javax.lang.model.SourceVersion;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;

import jdk.javadoc.doclet.Doclet;
import jdk.javadoc.doclet.DocletEnvironment;
import jdk.javadoc.doclet.StandardDoclet;
import jdk.javadoc.internal.doclets.formats.html.HtmlDoclet;
import jdk.javadoc.internal.doclets.toolkit.builders.AbstractBuilder;
import jdk.javadoc.internal.doclets.toolkit.builders.BuilderFactory;
import jdk.javadoc.internal.doclets.toolkit.util.ClassTree;
import jdk.javadoc.internal.doclets.toolkit.util.DocFileIOException;
import jdk.javadoc.internal.doclets.toolkit.util.UncheckedDocletException;
import jdk.javadoc.internal.doclets.toolkit.util.InternalException;
import jdk.javadoc.internal.doclets.toolkit.util.ElementListWriter;
import jdk.javadoc.internal.doclets.toolkit.util.ResourceIOException;
import jdk.javadoc.internal.doclets.toolkit.util.SimpleDocletException;
import jdk.javadoc.internal.doclets.toolkit.util.Utils;

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


An abstract implementation of a Doclet.
 
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.

/**
 * An abstract implementation of a Doclet.
 *
 *  <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>
 */
public abstract class AbstractDoclet implements Doclet {

    
The global configuration information for this run.

/**
     * The global configuration information for this run.
     */
    private BaseConfiguration configuration;

    protected Messages messages;

    /*
     *  a handle to our utility methods
     */
    protected Utils utils;

    
The only doclet that may use this toolkit is {@value} 
/**
     * The only doclet that may use this toolkit is {@value}
     */
    private static final String TOOLKIT_DOCLET_NAME =
        jdk.javadoc.internal.doclets.formats.html.HtmlDoclet.class.getName();

    
Verify that the only doclet that is using this toolkit is
#TOOLKIT_DOCLET_NAME.

/**
     * Verify that the only doclet that is using this toolkit is
     * #TOOLKIT_DOCLET_NAME.
     */
    private boolean isValidDoclet() {
        if (!getClass().getName().equals(TOOLKIT_DOCLET_NAME)) {
            messages.error("doclet.Toolkit_Usage_Violation",
                TOOLKIT_DOCLET_NAME);
            return false;
        }
        return true;
    }

    
The method that starts the execution of the doclet.

Params:
Returns:true if the doclet executed without error.  False otherwise.
/**
     * The method that starts the execution of the doclet.
     *
     * @param docEnv   the {@link DocletEnvironment}.
     * @return true if the doclet executed without error.  False otherwise.
     */
    @Override
    public boolean run(DocletEnvironment docEnv) {
        configuration = getConfiguration();
        configuration.initConfiguration(docEnv, getResourceKeyMapper(docEnv));
        utils = configuration.utils;
        messages = configuration.getMessages();
        BaseOptions options = configuration.getOptions();

        if (!isValidDoclet()) {
            return false;
        }

        try {
            try {
                startGeneration();
                return true;
            } catch (UncheckedDocletException e) {
                throw (DocletException) e.getCause();
            }

        } catch (DocFileIOException e) {
            switch (e.mode) {
                case READ:
                    messages.error("doclet.exception.read.file",
                            e.fileName.getPath(), e.getCause());
                    break;
                case WRITE:
                    messages.error("doclet.exception.write.file",
                            e.fileName.getPath(), e.getCause());
            }
            dumpStack(options.dumpOnError(), e);

        } catch (ResourceIOException e) {
            messages.error("doclet.exception.read.resource",
                    e.resource.getPath(), e.getCause());
            dumpStack(options.dumpOnError(), e);

        } catch (SimpleDocletException e) {
            configuration.reporter.print(ERROR, e.getMessage());
            dumpStack(options.dumpOnError(), e);

        } catch (InternalException e) {
            configuration.reporter.print(ERROR, e.getMessage());
            reportInternalError(e.getCause());

        } catch (DocletException | RuntimeException | Error e) {
            messages.error("doclet.internal.exception", e);
            reportInternalError(e);
        }

        return false;
    }

    protected Function<String, String> getResourceKeyMapper(DocletEnvironment docEnv) {
        return null;
    }

    private void reportInternalError(Throwable t) {
        if (getClass().equals(StandardDoclet.class) || getClass().equals(HtmlDoclet.class)) {
            System.err.println(configuration.getDocResources().getText("doclet.internal.report.bug"));
        }
        dumpStack(true, t);
    }

    private void dumpStack(boolean enabled, Throwable t) {
        if (enabled && t != null) {
            t.printStackTrace(System.err);
        }
    }

    
Returns the SourceVersion indicating the features supported by this doclet.

Returns:SourceVersion
/**
     * Returns the SourceVersion indicating the features supported by this doclet.
     *
     * @return SourceVersion
     */
    @Override
    public SourceVersion getSupportedSourceVersion() {
        return SourceVersion.RELEASE_9;
    }

    
Create the configuration instance and returns it.

Returns:the configuration of the doclet.
/**
     * Create the configuration instance and returns it.
     *
     * @return the configuration of the doclet.
     */
    public abstract BaseConfiguration getConfiguration();

    
Start the generation of files. Call generate methods in the individual
writers, which will in turn generate the documentation files. Call the
TreeWriter generation first to ensure the Class Hierarchy is built
first and then can be used in the later generation.

Throws:
  • DocletException – if there is a problem while generating the documentation
/**
     * Start the generation of files. Call generate methods in the individual
     * writers, which will in turn generate the documentation files. Call the
     * TreeWriter generation first to ensure the Class Hierarchy is built
     * first and then can be used in the later generation.
     *
     * @throws DocletException if there is a problem while generating the documentation
     */
    private void startGeneration() throws DocletException {

        // Modules with no documented classes may be specified on the
        // command line to specify a service provider, allow these.
        if (configuration.getSpecifiedModuleElements().isEmpty() &&
                configuration.getIncludedTypeElements().isEmpty()) {
            messages.error("doclet.No_Public_Classes_To_Document");
            return;
        }
        if (!configuration.setOptions()) {
            return;
        }
        messages.notice("doclet.build_version",
            configuration.getDocletVersion());
        ClassTree classtree = new ClassTree(configuration, configuration.getOptions().noDeprecated());

        generateClassFiles(classtree);

        ElementListWriter.generate(configuration);
        generatePackageFiles(classtree);
        generateModuleFiles();

        generateOtherFiles(classtree);
        configuration.tagletManager.printReport();
    }

    
Generate additional documentation that is added to the API documentation.

Params:
  • classtree – the data structure representing the class tree
Throws:
  • DocletException – if there is a problem while generating the documentation
/**
     * Generate additional documentation that is added to the API documentation.
     *
     * @param classtree the data structure representing the class tree
     * @throws DocletException if there is a problem while generating the documentation
     */
    protected void generateOtherFiles(ClassTree classtree) throws DocletException {
        BuilderFactory builderFactory = configuration.getBuilderFactory();
        AbstractBuilder constantsSummaryBuilder = builderFactory.getConstantsSummaryBuilder();
        constantsSummaryBuilder.build();
        AbstractBuilder serializedFormBuilder = builderFactory.getSerializedFormBuilder();
        serializedFormBuilder.build();
    }

    
Generate the module documentation.

Throws:
  • DocletException – if there is a problem while generating the documentation
/**
     * Generate the module documentation.
     *
     * @throws DocletException if there is a problem while generating the documentation
     *
     */
    protected abstract void generateModuleFiles() throws DocletException;

    
Generate the package documentation.

Params:
  • classtree – the data structure representing the class tree
Throws:
  • DocletException – if there is a problem while generating the documentation
/**
     * Generate the package documentation.
     *
     * @param classtree the data structure representing the class tree
     * @throws DocletException if there is a problem while generating the documentation
     */
    protected abstract void generatePackageFiles(ClassTree classtree) throws DocletException;

    
Generate the class documentation.

Params:
  • arr – the set of types to be documented
  • classtree – the data structure representing the class tree
Throws:
  • DocletException – if there is a problem while generating the documentation
/**
     * Generate the class documentation.
     *
     * @param arr the set of types to be documented
     * @param classtree the data structure representing the class tree
     * @throws DocletException if there is a problem while generating the documentation
     */
    protected abstract void generateClassFiles(SortedSet<TypeElement> arr, ClassTree classtree)
            throws DocletException;

    
Iterate through all classes and construct documentation for them.

Params:
  • classtree – the data structure representing the class tree
Throws:
  • DocletException – if there is a problem while generating the documentation
/**
     * Iterate through all classes and construct documentation for them.
     *
     * @param classtree the data structure representing the class tree
     * @throws DocletException if there is a problem while generating the documentation
     */
    protected void generateClassFiles(ClassTree classtree)
            throws DocletException {

        SortedSet<TypeElement> classes = new TreeSet<>(utils.comparators.makeGeneralPurposeComparator());

        // handle classes specified as files on the command line
        for (PackageElement pkg : configuration.typeElementCatalog.packages()) {
            classes.addAll(configuration.typeElementCatalog.allClasses(pkg));
        }

        // handle classes specified in modules and packages on the command line
        SortedSet<PackageElement> packages = new TreeSet<>(utils.comparators.makePackageComparator());
        packages.addAll(configuration.getSpecifiedPackageElements());
        configuration.modulePackages.values().stream().forEach(packages::addAll);
        for (PackageElement pkg : packages) {
            classes.addAll(utils.getAllClasses(pkg));
        }

        generateClassFiles(classes, classtree);
    }
}