https://openjdk.java.net/ 
/*
 * Copyright (c) 2003, 2017, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.javadoc.internal.doclets.toolkit.builders;

import java.util.*;

import javax.lang.model.element.Element;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;

import jdk.javadoc.internal.doclets.toolkit.ConstantsSummaryWriter;
import jdk.javadoc.internal.doclets.toolkit.Content;
import jdk.javadoc.internal.doclets.toolkit.DocletException;
import jdk.javadoc.internal.doclets.toolkit.util.VisibleMemberMap;



Builds the Constants Summary Page.
 
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.

Author:Jamie Ho, Bhavesh Patel (Modified)
/**
 * Builds the Constants Summary Page.
 *
 *  <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 Jamie Ho
 * @author Bhavesh Patel (Modified)
 */
public class ConstantsSummaryBuilder extends AbstractBuilder {

    
The maximum number of package directories shown in the constant
value index.

/**
     * The maximum number of package directories shown in the constant
     * value index.
     */
    public static final int MAX_CONSTANT_VALUE_INDEX_LENGTH = 2;

    
The writer used to write the results.

/**
     * The writer used to write the results.
     */
    protected final ConstantsSummaryWriter writer;

    
The set of TypeElements that have constant fields.

/**
     * The set of TypeElements that have constant fields.
     */
    protected final Set<TypeElement> typeElementsWithConstFields;

    
The set of printed package headers.

/**
     * The set of printed package headers.
     */
    protected final Set<PackageElement> printedPackageHeaders;

    
The current package being documented.

/**
     * The current package being documented.
     */
    private PackageElement currentPackage;

    
The current class being documented.

/**
     * The current class being documented.
     */
    private TypeElement currentClass;

    
The content tree for the constant summary documentation.

/**
     * The content tree for the constant summary documentation.
     */
    private Content contentTree;

    
True if first package is listed.

/**
     * True if first package is listed.
     */
    private boolean first = true;

    
Construct a new ConstantsSummaryBuilder.

Params:
  • context –       the build context.
  • writer –        the writer for the summary.
/**
     * Construct a new ConstantsSummaryBuilder.
     *
     * @param context       the build context.
     * @param writer        the writer for the summary.
     */
    private ConstantsSummaryBuilder(Context context,
            ConstantsSummaryWriter writer) {
        super(context);
        this.writer = writer;
        this.typeElementsWithConstFields = new HashSet<>();
        this.printedPackageHeaders = new TreeSet<>(utils.makePackageComparator());
    }

    
Construct a ConstantsSummaryBuilder.

Params:
  • context –       the build context.
  • writer –        the writer for the summary.
Returns:the new ConstantsSummaryBuilder
/**
     * Construct a ConstantsSummaryBuilder.
     *
     * @param context       the build context.
     * @param writer        the writer for the summary.
     * @return the new ConstantsSummaryBuilder
     */
    public static ConstantsSummaryBuilder getInstance(Context context,
            ConstantsSummaryWriter writer) {
        return new ConstantsSummaryBuilder(context, writer);
    }

    
{@inheritDoc}

Throws:
/**
     * {@inheritDoc}
     * @throws DocletException if there is a problem while building the documentation
     */
    @Override
    public void build() throws DocletException {
        if (writer == null) {
            //Doclet does not support this output.
            return;
        }
        buildConstantSummary(contentTree);
    }

    
Build the constant summary.

Params:
  • contentTree – the content tree to which the documentation will be added
Throws:
/**
     * Build the constant summary.
     *
     * @param contentTree the content tree to which the documentation will be added
     * @throws DocletException if there is a problem while building the documentation
     */
    protected void buildConstantSummary(Content contentTree) throws DocletException {
        contentTree = writer.getHeader();

        buildContents(contentTree);
        buildConstantSummaries(contentTree);

        writer.addFooter(contentTree);
        writer.printDocument(contentTree);
    }

    
Build the list of packages.

Params:
  • contentTree – the content tree to which the content list will be added
/**
     * Build the list of packages.
     *
     * @param contentTree the content tree to which the content list will be added
     */
    protected void buildContents(Content contentTree) {
        Content contentListTree = writer.getContentsHeader();
        printedPackageHeaders.clear();
        for (PackageElement pkg : configuration.packages) {
            if (hasConstantField(pkg) && !hasPrintedPackageIndex(pkg)) {
                writer.addLinkToPackageContent(pkg, printedPackageHeaders, contentListTree);
            }
        }
        writer.addContentsList(contentTree, contentListTree);
    }

    
Build the summary for each documented package.

Params:
  • contentTree – the tree to which the summaries will be added
Throws:
/**
     * Build the summary for each documented package.
     *
     * @param contentTree the tree to which the summaries will be added
     * @throws DocletException if there is a problem while building the documentation
     */
    protected void buildConstantSummaries(Content contentTree) throws DocletException {
        printedPackageHeaders.clear();
        Content summariesTree = writer.getConstantSummaries();
        for (PackageElement aPackage : configuration.packages) {
            if (hasConstantField(aPackage)) {
                currentPackage = aPackage;
                //Build the documentation for the current package.

                buildPackageHeader(summariesTree);
                buildClassConstantSummary(summariesTree);

                first = false;
            }
        }
        writer.addConstantSummaries(contentTree, summariesTree);
    }

    
Build the header for the given package.

Params:
  • summariesTree – the tree to which the package header will be added
/**
     * Build the header for the given package.
     *
     * @param summariesTree the tree to which the package header will be added
     */
    protected void buildPackageHeader(Content summariesTree) {
        PackageElement abbrevPkg = configuration.workArounds.getAbbreviatedPackageElement(currentPackage);
        if (!printedPackageHeaders.contains(abbrevPkg)) {
            writer.addPackageName(currentPackage, summariesTree, first);
            printedPackageHeaders.add(abbrevPkg);
        }
    }

    
Build the summary for the current class.

Params:
  • summariesTree – the tree to which the class constant summary will be added
Throws:
/**
     * Build the summary for the current class.
     *
     * @param summariesTree the tree to which the class constant summary will be added
     * @throws DocletException if there is a problem while building the documentation
     *
     */
    protected void buildClassConstantSummary(Content summariesTree)
            throws DocletException {
        SortedSet<TypeElement> classes = !currentPackage.isUnnamed()
                ? utils.getAllClasses(currentPackage)
                : configuration.typeElementCatalog.allUnnamedClasses();
        Content classConstantTree = writer.getClassConstantHeader();
        for (TypeElement te : classes) {
            if (!typeElementsWithConstFields.contains(te) ||
                !utils.isIncluded(te)) {
                continue;
            }
            currentClass = te;
            //Build the documentation for the current class.

            buildConstantMembers(classConstantTree);

        }
        writer.addClassConstant(summariesTree, classConstantTree);
    }

    
Build the summary of constant members in the class.

Params:
  • classConstantTree – the tree to which the constant members table
                         will be added
/**
     * Build the summary of constant members in the class.
     *
     * @param classConstantTree the tree to which the constant members table
     *                          will be added
     */
    protected void buildConstantMembers(Content classConstantTree) {
        new ConstantFieldBuilder(currentClass).buildMembersSummary(classConstantTree);
    }

    
Return true if the given package has constant fields to document.

Params:
  • pkg –   the package being checked.
Returns:true if the given package has constant fields to document.
/**
     * Return true if the given package has constant fields to document.
     *
     * @param pkg   the package being checked.
     * @return true if the given package has constant fields to document.
     */
    private boolean hasConstantField(PackageElement pkg) {
        SortedSet<TypeElement> classes = !pkg.isUnnamed()
                  ? utils.getAllClasses(pkg)
                  : configuration.typeElementCatalog.allUnnamedClasses();
        boolean found = false;
        for (TypeElement te : classes) {
            if (utils.isIncluded(te) && hasConstantField(te)) {
                found = true;
            }
        }
        return found;
    }

    
Return true if the given class has constant fields to document.

Params:
  • typeElement – the class being checked.
Returns:true if the given package has constant fields to document.
/**
     * Return true if the given class has constant fields to document.
     *
     * @param typeElement the class being checked.
     * @return true if the given package has constant fields to document.
     */
    private boolean hasConstantField (TypeElement typeElement) {
        VisibleMemberMap visibleMemberMapFields = configuration.getVisibleMemberMap(typeElement,
            VisibleMemberMap.Kind.FIELDS);
        List<Element> fields = visibleMemberMapFields.getLeafMembers();
        for (Element f : fields) {
            VariableElement field = (VariableElement)f;
            if (field.getConstantValue() != null) {
                typeElementsWithConstFields.add(typeElement);
                return true;
            }
        }
        return false;
    }

    
Return true if the given package name has been printed.  Also
return true if the root of this package has been printed.

Params:
  • pkgname – the name of the package to check.
/**
     * Return true if the given package name has been printed.  Also
     * return true if the root of this package has been printed.
     *
     * @param pkgname the name of the package to check.
     */
    private boolean hasPrintedPackageIndex(PackageElement pkg) {
        for (PackageElement printedPkg : printedPackageHeaders) {
            if (utils.getPackageName(pkg).startsWith(utils.parsePackageName(printedPkg))) {
                return true;
            }
        }
        return false;
    }

    
Print the table of constants.

Author:Jamie Ho
/**
     * Print the table of constants.
     *
     * @author Jamie Ho
     */
    private class ConstantFieldBuilder {

        
The map used to get the visible variables.

/**
         * The map used to get the visible variables.
         */
        protected VisibleMemberMap visibleMemberMapFields = null;

        
The map used to get the visible variables.

/**
         * The map used to get the visible variables.
         */
        protected VisibleMemberMap visibleMemberMapEnumConst = null;

        
The typeElement that we are examining constants for.

/**
         * The typeElement that we are examining constants for.
         */
        protected TypeElement typeElement;

        
Construct a ConstantFieldSubWriter.

Params:
  • typeElement – the typeElement that we are examining constants for.
/**
         * Construct a ConstantFieldSubWriter.
         * @param typeElement the typeElement that we are examining constants for.
         */
        public ConstantFieldBuilder(TypeElement typeElement) {
            this.typeElement = typeElement;
            visibleMemberMapFields = configuration.getVisibleMemberMap(typeElement,
                VisibleMemberMap.Kind.FIELDS);
            visibleMemberMapEnumConst = configuration.getVisibleMemberMap(typeElement,
                VisibleMemberMap.Kind.ENUM_CONSTANTS);
        }

        
Builds the table of constants for a given class.

Params:
  • classConstantTree – the tree to which the class constants table
                         will be added
/**
         * Builds the table of constants for a given class.
         *
         * @param classConstantTree the tree to which the class constants table
         *                          will be added
         */
        protected void buildMembersSummary(Content classConstantTree) {
            SortedSet<VariableElement> members = members();
            if (!members.isEmpty()) {
                writer.addConstantMembers(typeElement, members, classConstantTree);
            }
        }

        
Returns a set of visible constant fields for the given type.

Returns:the set of visible constant fields for the given type.
/**
         * Returns a set of visible constant fields for the given type.
         * @return the set of visible constant fields for the given type.
         */
        protected SortedSet<VariableElement> members() {
            List<Element> members = visibleMemberMapFields.getLeafMembers();
            members.addAll(visibleMemberMapEnumConst.getLeafMembers());
            SortedSet<VariableElement> includes =
                    new TreeSet<>(utils.makeGeneralPurposeComparator());
            for (Element element : members) {
                VariableElement member = (VariableElement)element;
                if (member.getConstantValue() != null) {
                    includes.add(member);
                }
            }
            return includes;
        }
    }
}