/*
 * Copyright (c) 2001, 2016, 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.taglets;

import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;

import com.sun.source.doctree.DocTree;
import jdk.javadoc.internal.doclets.toolkit.Configuration;
import jdk.javadoc.internal.doclets.toolkit.Content;
import jdk.javadoc.internal.doclets.toolkit.Messages;
import jdk.javadoc.internal.doclets.toolkit.util.CommentHelper;
import jdk.javadoc.internal.doclets.toolkit.util.DocFinder;
import jdk.javadoc.internal.doclets.toolkit.util.DocFinder.Input;
import jdk.javadoc.internal.doclets.toolkit.util.Utils;

import static com.sun.source.doctree.DocTree.Kind.*;

An inline Taglet representing the inheritDoc tag. This tag should only
be used with a method.  It is used to inherit documentation from overriden
and implemented methods.
 
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/**
 * An inline Taglet representing the <b>inheritDoc</b> tag. This tag should only
 * be used with a method.  It is used to inherit documentation from overriden
 * and implemented methods.
 *
 *  <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
 */

public class InheritDocTaglet extends BaseInlineTaglet {

    
The inline tag that would appear in the documentation if
the writer wanted documentation to be inherited.
/**
     * The inline tag that would appear in the documentation if
     * the writer wanted documentation to be inherited.
     */
    public static final String INHERIT_DOC_INLINE_TAG = "{@inheritDoc}";

    
Construct a new InheritDocTaglet.
/**
     * Construct a new InheritDocTaglet.
     */
    public InheritDocTaglet () {
        name = INHERIT_DOC.tagName;
    }

    
Will return false because this inline tag may
not appear in Fields.
Returns:
false/**
     * Will return false because this inline tag may
     * not appear in Fields.
     * @return false
     */
    public boolean inField() {
        return false;
    }

    
Will return false because this inline tag may
not appear in Constructors.
Returns:
false/**
     * Will return false because this inline tag may
     * not appear in Constructors.
     * @return false
     */
    public boolean inConstructor() {
        return false;
    }

    
Will return false because this inline tag may
not appear in Overview.
Returns:
false/**
     * Will return false because this inline tag may
     * not appear in Overview.
     * @return false
     */
    public boolean inOverview() {
        return false;
    }

    
Will return false because this inline tag may
not appear in Modules.
Returns:
false/**
     * Will return false because this inline tag may
     * not appear in Modules.
     * @return false
     */
    public boolean inModule() {
        return false;
    }

    
Will return false because this inline tag may
not appear in Packages.
Returns:
false/**
     * Will return false because this inline tag may
     * not appear in Packages.
     * @return false
     */
    public boolean inPackage() {
        return false;
    }

    
Will return true because this inline tag may
appear in Type (Class).
Returns:
true/**
     * Will return true because this inline tag may
     * appear in Type (Class).
     * @return true
     */
    public boolean inType() {
        return true;
    }

    
Given a MethodDoc item, a Tag in the
MethodDoc item and a String, replace all occurrences
of @inheritDoc with documentation from it's superclass or superinterface.
Params:
writer – the writer that is writing the output.
e – the Element that we are documenting.
holderTag – the tag that holds the inheritDoc tag or null for type
(class) docs.
isFirstSentence – true if we only want to inherit the first sentence./**
     * Given a <code>MethodDoc</code> item, a <code>Tag</code> in the
     * <code>MethodDoc</code> item and a String, replace all occurrences
     * of @inheritDoc with documentation from it's superclass or superinterface.
     *
     * @param writer the writer that is writing the output.
     * @param e the {@link Element} that we are documenting.
     * @param holderTag the tag that holds the inheritDoc tag or null for type
     * (class) docs.
     * @param isFirstSentence true if we only want to inherit the first sentence.
     */
    private Content retrieveInheritedDocumentation(TagletWriter writer,
            Element e, DocTree holderTag, boolean isFirstSentence) {
        Content replacement = writer.getOutputInstance();
        Configuration configuration = writer.configuration();
        Messages messages = configuration.getMessages();
        Utils utils = configuration.utils;
        CommentHelper ch = utils.getCommentHelper(e);
        Taglet inheritableTaglet = holderTag == null
                ? null
                : configuration.tagletManager.getTaglet(ch.getTagName(holderTag));
        if (inheritableTaglet != null &&
            !(inheritableTaglet instanceof InheritableTaglet)) {
                String message = utils.getSimpleName(e) +
                    ((utils.isExecutableElement(e))
                        ? utils.flatSignature((ExecutableElement)e)
                        : "");
                //This tag does not support inheritence.
                messages.warning(e, "doclet.noInheritedDoc", message);
        }
        Input input = new DocFinder.Input(utils, e,
                (InheritableTaglet) inheritableTaglet, new DocFinder.DocTreeInfo(holderTag, e),
                isFirstSentence, true);
        DocFinder.Output inheritedDoc = DocFinder.search(configuration, input);
        if (inheritedDoc.isValidInheritDocTag) {
            if (!inheritedDoc.inlineTags.isEmpty()) {
                replacement = writer.commentTagsToOutput(inheritedDoc.holderTag,
                    inheritedDoc.holder, inheritedDoc.inlineTags, isFirstSentence);
                ch.setOverrideElement(inheritedDoc.holder);
            }

        } else {
            String message = utils.getSimpleName(e) +
                    ((utils.isExecutableElement(e))
                        ? utils.flatSignature((ExecutableElement)e)
                        : "");
            messages.warning(e, "doclet.noInheritedDoc", message);
        }
        return replacement;
    }

    
Given the Tag representation of this custom
tag, return its string representation, which is output
to the generated page.
Params:
e – the element holding the tag
tag – the Tag representation of this custom tag.
tagletWriter – the taglet writer for output.
Returns:
the Content representation of this Tag./**
     * Given the <code>Tag</code> representation of this custom
     * tag, return its string representation, which is output
     * to the generated page.
     *
     * @param e the element holding the tag
     * @param tag the <code>Tag</code> representation of this custom tag.
     * @param tagletWriter the taglet writer for output.
     * @return the Content representation of this <code>Tag</code>.
     */
    public Content getTagletOutput(Element e, DocTree tag, TagletWriter tagletWriter) {
        DocTree  inheritTag = tag.getKind() == INHERIT_DOC ? null : tag;
        return retrieveInheritedDocumentation(tagletWriter, e,
                inheritTag, tagletWriter.isFirstSentence);
    }
}