Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2001, 2013, 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 com.sun.tools.doclets.internal.toolkit.taglets;

 import java.util.*;

 import com.sun.javadoc.*;

 import com.sun.tools.doclets.internal.toolkit.Content;

 import com.sun.tools.doclets.internal.toolkit.util.*;

 /**

  * A taglet that represents the @param tag.

  *

  *  <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

  * @since 1.4

  */

 public class ParamTaglet extends BaseTaglet implements InheritableTaglet {

     /**

      * Construct a ParamTaglet.

      */

     public ParamTaglet() {

         name = "param";

     }

     /**

      * Given an array of <code>Parameter</code>s, return

      * a name/rank number map.  If the array is null, then

      * null is returned.

      * @param params The array of parmeters (from type or executable member) to

      *               check.

      * @return a name-rank number map.

      */

     private static Map<String,String> getRankMap(Object[] params){

         if (params == null) {

             return null;

         }

         HashMap<String,String> result = new HashMap<String,String>();

         for (int i = 0; i < params.length; i++) {

             String name = params[i] instanceof Parameter ?

                 ((Parameter) params[i]).name() :

                 ((TypeVariable) params[i]).typeName();

             result.put(name, String.valueOf(i));

         }

         return result;

     }

     /**

      * {@inheritDoc}

      */

     public void inherit(DocFinder.Input input, DocFinder.Output output) {

         if (input.tagId == null) {

             input.isTypeVariableParamTag = ((ParamTag) input.tag).isTypeParameter();

             Object[] parameters = input.isTypeVariableParamTag ?

                 (Object[]) ((MethodDoc) input.tag.holder()).typeParameters() :

                 (Object[]) ((MethodDoc) input.tag.holder()).parameters();

             String target = ((ParamTag) input.tag).parameterName();

             int i;

             for (i = 0; i < parameters.length; i++) {

                 String name = parameters[i] instanceof Parameter ?

                     ((Parameter) parameters[i]).name() :

                     ((TypeVariable) parameters[i]).typeName();

                 if (name.equals(target)) {

                     input.tagId = String.valueOf(i);

                     break;

                 }

             }

             if (i == parameters.length) {

                 //Someone used {@inheritDoc} on an invalid @param tag.

                 //We don't know where to inherit from.

                 //XXX: in the future when Configuration is available here,

                 //print a warning for this mistake.

                 return;

             }

         }

         ParamTag[] tags = input.isTypeVariableParamTag ?

             ((MethodDoc)input.element).typeParamTags() : ((MethodDoc)input.element).paramTags();

         Map<String, String> rankMap = getRankMap(input.isTypeVariableParamTag ?

             (Object[]) ((MethodDoc)input.element).typeParameters() :

             (Object[]) ((MethodDoc)input.element).parameters());

         for (int i = 0; i < tags.length; i++) {

             if (rankMap.containsKey(tags[i].parameterName()) &&

                     rankMap.get(tags[i].parameterName()).equals((input.tagId))) {

                 output.holder = input.element;

                 output.holderTag = tags[i];

                 output.inlineTags = input.isFirstSentence ?

                     tags[i].firstSentenceTags() : tags[i].inlineTags();

                 return;

             }

         }

     }

     /**

      * {@inheritDoc}

      */

     public boolean inField() {

         return false;

     }

     /**

      * {@inheritDoc}

      */

     public boolean inMethod() {

         return true;

     }

     /**

      * {@inheritDoc}

      */

     public boolean inOverview() {

         return false;

     }

     /**

      * {@inheritDoc}

      */

     public boolean inPackage() {

         return false;

     }

     /**

      * {@inheritDoc}

      */

     public boolean inType() {

         return true;

     }

     /**

      * {@inheritDoc}

      */

     public boolean isInlineTag() {

         return false;

     }

     /**

      * Given an array of <code>ParamTag</code>s,return its string representation.

      * @param holder the member that holds the param tags.

      * @param writer the TagletWriter that will write this tag.

      * @return the TagletOutput representation of these <code>ParamTag</code>s.

      */

     public Content getTagletOutput(Doc holder, TagletWriter writer) {

         if (holder instanceof ExecutableMemberDoc) {

             ExecutableMemberDoc member = (ExecutableMemberDoc) holder;

             Content output = getTagletOutput(false, member, writer,

                 member.typeParameters(), member.typeParamTags());

             output.addContent(getTagletOutput(true, member, writer,

                 member.parameters(), member.paramTags()));

             return output;

         } else {

             ClassDoc classDoc = (ClassDoc) holder;

             return getTagletOutput(false, classDoc, writer,

                 classDoc.typeParameters(), classDoc.typeParamTags());

         }

     }

     /**

      * Given an array of <code>ParamTag</code>s,return its string representation.

      * Try to inherit the param tags that are missing.

      *

      * @param holder            the doc that holds the param tags.

      * @param writer            the TagletWriter that will write this tag.

      * @param formalParameters  The array of parmeters (from type or executable

      *                          member) to check.

      *

      * @return the TagletOutput representation of these <code>ParamTag</code>s.

      */

     private Content getTagletOutput(boolean isNonTypeParams, Doc holder,

             TagletWriter writer, Object[] formalParameters, ParamTag[] paramTags) {

         Content result = writer.getOutputInstance();

         Set<String> alreadyDocumented = new HashSet<String>();

         if (paramTags.length > 0) {

             result.addContent(

                 processParamTags(isNonTypeParams, paramTags,

                 getRankMap(formalParameters), writer, alreadyDocumented)

             );

         }

         if (alreadyDocumented.size() != formalParameters.length) {

             //Some parameters are missing corresponding @param tags.

             //Try to inherit them.

             result.addContent(getInheritedTagletOutput (isNonTypeParams, holder,

                 writer, formalParameters, alreadyDocumented));

         }

         return result;

     }

     /**

      * Loop through each indivitual parameter.  It it does not have a

      * corresponding param tag, try to inherit it.

      */

     private Content getInheritedTagletOutput(boolean isNonTypeParams, Doc holder,

             TagletWriter writer, Object[] formalParameters,

             Set<String> alreadyDocumented) {

         Content result = writer.getOutputInstance();

         if ((! alreadyDocumented.contains(null)) &&

                 holder instanceof MethodDoc) {

             for (int i = 0; i < formalParameters.length; i++) {

                 if (alreadyDocumented.contains(String.valueOf(i))) {

                     continue;

                 }

                 //This parameter does not have any @param documentation.

                 //Try to inherit it.

                 DocFinder.Output inheritedDoc =

                     DocFinder.search(new DocFinder.Input((MethodDoc) holder, this,

                         String.valueOf(i), ! isNonTypeParams));

                 if (inheritedDoc.inlineTags != null &&

                         inheritedDoc.inlineTags.length > 0) {

                     result.addContent(

                         processParamTag(isNonTypeParams, writer,

                             (ParamTag) inheritedDoc.holderTag,

                             isNonTypeParams ?

                                 ((Parameter) formalParameters[i]).name():

                                 ((TypeVariable) formalParameters[i]).typeName(),

                             alreadyDocumented.size() == 0));

                 }

                 alreadyDocumented.add(String.valueOf(i));

             }

         }

         return result;

     }

     /**

      * Given an array of <code>Tag</code>s representing this custom

      * tag, return its string representation.  Print a warning for param

      * tags that do not map to parameters.  Print a warning for param

      * tags that are duplicated.

      *

      * @param paramTags the array of <code>ParamTag</code>s to convert.

      * @param writer the TagletWriter that will write this tag.

      * @param alreadyDocumented the set of exceptions that have already

      *        been documented.

      * @param rankMap a {@link java.util.Map} which holds ordering

      *                    information about the parameters.

      * @param rankMap a {@link java.util.Map} which holds a mapping

      *                of a rank of a parameter to its name.  This is

      *                used to ensure that the right name is used

      *                when parameter documentation is inherited.

      * @return the Content representation of this <code>Tag</code>.

      */

     private Content processParamTags(boolean isNonTypeParams,

             ParamTag[] paramTags, Map<String, String> rankMap, TagletWriter writer,

             Set<String> alreadyDocumented) {

         Content result = writer.getOutputInstance();

         if (paramTags.length > 0) {

             for (int i = 0; i < paramTags.length; ++i) {

                 ParamTag pt = paramTags[i];

                 String paramName = isNonTypeParams ?

                     pt.parameterName() : "<" + pt.parameterName() + ">";

                 if (! rankMap.containsKey(pt.parameterName())) {

                     writer.getMsgRetriever().warning(pt.position(),

                         isNonTypeParams ?

                             "doclet.Parameters_warn" :

                             "doclet.Type_Parameters_warn",

                         paramName);

                 }

                 String rank = rankMap.get(pt.parameterName());

                 if (rank != null && alreadyDocumented.contains(rank)) {

                     writer.getMsgRetriever().warning(pt.position(),

                        isNonTypeParams ?

                            "doclet.Parameters_dup_warn" :

                            "doclet.Type_Parameters_dup_warn",

                        paramName);

                 }

                 result.addContent(processParamTag(isNonTypeParams, writer, pt,

                      pt.parameterName(), alreadyDocumented.size() == 0));

                 alreadyDocumented.add(rank);

             }

         }

         return result;

     }

     /**

      * Convert the individual ParamTag into Content.

      *

      * @param isNonTypeParams true if this is just a regular param tag.  False

      *                        if this is a type param tag.

      * @param writer          the taglet writer for output writing.

      * @param paramTag        the tag whose inline tags will be printed.

      * @param name            the name of the parameter.  We can't rely on

      *                        the name in the param tag because we might be

      *                        inheriting documentation.

      * @param isFirstParam    true if this is the first param tag being printed.

      *

      */

     private Content processParamTag(boolean isNonTypeParams,

             TagletWriter writer, ParamTag paramTag, String name,

             boolean isFirstParam) {

         Content result = writer.getOutputInstance();

         String header = writer.configuration().getText(

             isNonTypeParams ? "doclet.Parameters" : "doclet.TypeParameters");

         if (isFirstParam) {

             result.addContent(writer.getParamHeader(header));

         }

         result.addContent(writer.paramTagOutput(paramTag,

             name));

         return result;

     }

 }