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 /*

  * Copyright (c) 1999, 2012, 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 com.sun.tools.doclets.internal.toolkit.util;

 import java.io.*;

 import java.util.*;

 import com.sun.javadoc.*;

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

 import javax.tools.StandardLocation;

 /**

  * Utilities Class for Doclets.

  *

  *  <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 Atul M Dambalkar

  * @author Jamie Ho

  */

 public class Util {

     /**

      * Return array of class members whose documentation is to be generated.

      * If the member is deprecated do not include such a member in the

      * returned array.

      *

      * @param  members             Array of members to choose from.

      * @return ProgramElementDoc[] Array of eligible members for whom

      *                             documentation is getting generated.

      */

     public static ProgramElementDoc[] excludeDeprecatedMembers(

         ProgramElementDoc[] members) {

         return

             toProgramElementDocArray(excludeDeprecatedMembersAsList(members));

     }

     /**

      * Return array of class members whose documentation is to be generated.

      * If the member is deprecated do not include such a member in the

      * returned array.

      *

      * @param  members    Array of members to choose from.

      * @return List       List of eligible members for whom

      *                    documentation is getting generated.

      */

     public static List<ProgramElementDoc> excludeDeprecatedMembersAsList(

         ProgramElementDoc[] members) {

         List<ProgramElementDoc> list = new ArrayList<ProgramElementDoc>();

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

             if (members[i].tags("deprecated").length == 0) {

                 list.add(members[i]);

             }

         }

         Collections.sort(list);

         return list;

     }

     /**

      * Return the list of ProgramElementDoc objects as Array.

      */

     public static ProgramElementDoc[] toProgramElementDocArray(List<ProgramElementDoc> list) {

         ProgramElementDoc[] pgmarr = new ProgramElementDoc[list.size()];

         for (int i = 0; i < list.size(); i++) {

             pgmarr[i] = list.get(i);

         }

         return pgmarr;

     }

     /**

      * Return true if a non-public member found in the given array.

      *

      * @param  members Array of members to look into.

      * @return boolean True if non-public member found, false otherwise.

      */

     public static boolean nonPublicMemberFound(ProgramElementDoc[] members) {

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

             if (!members[i].isPublic()) {

                 return true;

             }

         }

         return false;

     }

     /**

      * Search for the given method in the given class.

      *

      * @param  cd        Class to search into.

      * @param  method    Method to be searched.

      * @return MethodDoc Method found, null otherwise.

      */

     public static MethodDoc findMethod(ClassDoc cd, MethodDoc method) {

         MethodDoc[] methods = cd.methods();

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

             if (executableMembersEqual(method, methods[i])) {

                 return methods[i];

             }

         }

         return null;

     }

     /**

      * @param member1 the first method to compare.

      * @param member2 the second method to compare.

      * @return true if member1 overrides/hides or is overriden/hidden by member2.

      */

     public static boolean executableMembersEqual(ExecutableMemberDoc member1,

             ExecutableMemberDoc member2) {

         if (! (member1 instanceof MethodDoc && member2 instanceof MethodDoc))

             return false;

         MethodDoc method1 = (MethodDoc) member1;

         MethodDoc method2 = (MethodDoc) member2;

         if (method1.isStatic() && method2.isStatic()) {

             Parameter[] targetParams = method1.parameters();

             Parameter[] currentParams;

             if (method1.name().equals(method2.name()) &&

                    (currentParams = method2.parameters()).length ==

                 targetParams.length) {

                 int j;

                 for (j = 0; j < targetParams.length; j++) {

                     if (! (targetParams[j].typeName().equals(

                               currentParams[j].typeName()) ||

                                    currentParams[j].type() instanceof TypeVariable ||

                                    targetParams[j].type() instanceof TypeVariable)) {

                         break;

                     }

                 }

                 if (j == targetParams.length) {

                     return true;

                 }

             }

             return false;

         } else {

                 return method1.overrides(method2) ||

                 method2.overrides(method1) ||

                                 member1 == member2;

         }

     }

     /**

      * According to

      * <cite>The Java&trade; Language Specification</cite>,

      * all the outer classes and static inner classes are core classes.

      */

     public static boolean isCoreClass(ClassDoc cd) {

         return cd.containingClass() == null || cd.isStatic();

     }

     public static boolean matches(ProgramElementDoc doc1,

             ProgramElementDoc doc2) {

         if (doc1 instanceof ExecutableMemberDoc &&

             doc2 instanceof ExecutableMemberDoc) {

             ExecutableMemberDoc ed1 = (ExecutableMemberDoc)doc1;

             ExecutableMemberDoc ed2 = (ExecutableMemberDoc)doc2;

             return executableMembersEqual(ed1, ed2);

         } else {

             return doc1.name().equals(doc2.name());

         }

     }

     /**

      * Copy the given directory contents from the source package directory

      * to the generated documentation directory. For example for a package

      * java.lang this method find out the source location of the package using

      * {@link SourcePath} and if given directory is found in the source

      * directory structure, copy the entire directory, to the generated

      * documentation hierarchy.

      *

      * @param configuration The configuration of the current doclet.

      * @param path The relative path to the directory to be copied.

      * @param dir The original directory name to copy from.

      * @param overwrite Overwrite files if true.

      */

     public static void copyDocFiles(Configuration configuration, PackageDoc pd) {

         copyDocFiles(configuration, DocPath.forPackage(pd).resolve(DocPaths.DOC_FILES));

     }

     public static void copyDocFiles(Configuration configuration, DocPath dir) {

         try {

             boolean first = true;

             for (DocFile f : DocFile.list(configuration, StandardLocation.SOURCE_PATH, dir)) {

                 if (!f.isDirectory()) {

                     continue;

                 }

                 DocFile srcdir = f;

                 DocFile destdir = DocFile.createFileForOutput(configuration, dir);

                 if (srcdir.isSameFile(destdir)) {

                     continue;

                 }

                 for (DocFile srcfile: srcdir.list()) {

                     DocFile destfile = destdir.resolve(srcfile.getName());

                     if (srcfile.isFile()) {

                         if (destfile.exists() && !first) {

                             configuration.message.warning((SourcePosition) null,

                                     "doclet.Copy_Overwrite_warning",

                                     srcfile.getPath(), destdir.getPath());

                         } else {

                             configuration.message.notice(

                                     "doclet.Copying_File_0_To_Dir_1",

                                     srcfile.getPath(), destdir.getPath());

                             destfile.copyFile(srcfile);

                         }

                     } else if (srcfile.isDirectory()) {

                         if (configuration.copydocfilesubdirs

                                 && !configuration.shouldExcludeDocFileDir(srcfile.getName())) {

                             copyDocFiles(configuration, dir.resolve(srcfile.getName()));

                         }

                     }

                 }

                 first = false;

             }

         } catch (SecurityException exc) {

             throw new DocletAbortException();

         } catch (IOException exc) {

             throw new DocletAbortException();

         }

     }

     /**

      * We want the list of types in alphabetical order.  However, types are not

      * comparable.  We need a comparator for now.

      */

     private static class TypeComparator implements Comparator<Type> {

         public int compare(Type type1, Type type2) {

             return type1.qualifiedTypeName().toLowerCase().compareTo(

                 type2.qualifiedTypeName().toLowerCase());

         }

     }

     /**

      * For the class return all implemented interfaces including the

      * superinterfaces of the implementing interfaces, also iterate over for

      * all the superclasses. For interface return all the extended interfaces

      * as well as superinterfaces for those extended interfaces.

      *

      * @param  type       type whose implemented or

      *                    super interfaces are sought.

      * @param  configuration the current configuration of the doclet.

      * @param  sort if true, return list of interfaces sorted alphabetically.

      * @return List of all the required interfaces.

      */

     public static List<Type> getAllInterfaces(Type type,

             Configuration configuration, boolean sort) {

         Map<ClassDoc,Type> results = sort ? new TreeMap<ClassDoc,Type>() : new LinkedHashMap<ClassDoc,Type>();

         Type[] interfaceTypes = null;

         Type superType = null;

         if (type instanceof ParameterizedType) {

             interfaceTypes = ((ParameterizedType) type).interfaceTypes();

             superType = ((ParameterizedType) type).superclassType();

         } else if (type instanceof ClassDoc) {

             interfaceTypes = ((ClassDoc) type).interfaceTypes();

             superType = ((ClassDoc) type).superclassType();

         } else {

             interfaceTypes = type.asClassDoc().interfaceTypes();

             superType = type.asClassDoc().superclassType();

         }

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

             Type interfaceType = interfaceTypes[i];

             ClassDoc interfaceClassDoc = interfaceType.asClassDoc();

             if (! (interfaceClassDoc.isPublic() ||

                 (configuration == null ||

                 isLinkable(interfaceClassDoc, configuration)))) {

                 continue;

             }

             results.put(interfaceClassDoc, interfaceType);

             List<Type> superInterfaces = getAllInterfaces(interfaceType, configuration, sort);

             for (Iterator<Type> iter = superInterfaces.iterator(); iter.hasNext(); ) {

                 Type t = iter.next();

                 results.put(t.asClassDoc(), t);

             }

         }

         if (superType == null)

             return new ArrayList<Type>(results.values());

         //Try walking the tree.

         addAllInterfaceTypes(results,

             superType,

             superType instanceof ClassDoc ?

                 ((ClassDoc) superType).interfaceTypes() :

                 ((ParameterizedType) superType).interfaceTypes(),

             false, configuration);

         List<Type> resultsList = new ArrayList<Type>(results.values());

         if (sort) {

                 Collections.sort(resultsList, new TypeComparator());

         }

         return resultsList;

     }

     public static List<Type> getAllInterfaces(Type type, Configuration configuration) {

         return getAllInterfaces(type, configuration, true);

     }

     private static void findAllInterfaceTypes(Map<ClassDoc,Type> results, ClassDoc c, boolean raw,

             Configuration configuration) {

         Type superType = c.superclassType();

         if (superType == null)

             return;

         addAllInterfaceTypes(results, superType,

                 superType instanceof ClassDoc ?

                 ((ClassDoc) superType).interfaceTypes() :

                 ((ParameterizedType) superType).interfaceTypes(),

                 raw, configuration);

     }

     private static void findAllInterfaceTypes(Map<ClassDoc,Type> results, ParameterizedType p,

             Configuration configuration) {

         Type superType = p.superclassType();

         if (superType == null)

             return;

         addAllInterfaceTypes(results, superType,

                 superType instanceof ClassDoc ?

                 ((ClassDoc) superType).interfaceTypes() :

                 ((ParameterizedType) superType).interfaceTypes(),

                 false, configuration);

     }

     private static void addAllInterfaceTypes(Map<ClassDoc,Type> results, Type type,

             Type[] interfaceTypes, boolean raw,

             Configuration configuration) {

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

             Type interfaceType = interfaceTypes[i];

             ClassDoc interfaceClassDoc = interfaceType.asClassDoc();

             if (! (interfaceClassDoc.isPublic() ||

                 (configuration != null &&

                 isLinkable(interfaceClassDoc, configuration)))) {

                 continue;

             }

             if (raw)

                 interfaceType = interfaceType.asClassDoc();

             results.put(interfaceClassDoc, interfaceType);

             List<Type> superInterfaces = getAllInterfaces(interfaceType, configuration);

             for (Iterator<Type> iter = superInterfaces.iterator(); iter.hasNext(); ) {

                 Type superInterface = iter.next();

                 results.put(superInterface.asClassDoc(), superInterface);

             }

         }

         if (type instanceof ParameterizedType)

             findAllInterfaceTypes(results, (ParameterizedType) type, configuration);

         else if (((ClassDoc) type).typeParameters().length == 0)

             findAllInterfaceTypes(results, (ClassDoc) type, raw, configuration);

         else

             findAllInterfaceTypes(results, (ClassDoc) type, true, configuration);

     }

     /**

      * Enclose in quotes, used for paths and filenames that contains spaces

      */

     public static String quote(String filepath) {

         return ("\"" + filepath + "\"");

     }

     /**

      * Given a package, return its name.

      * @param packageDoc the package to check.

      * @return the name of the given package.

      */

     public static String getPackageName(PackageDoc packageDoc) {

         return packageDoc == null || packageDoc.name().length() == 0 ?

             DocletConstants.DEFAULT_PACKAGE_NAME : packageDoc.name();

     }

     /**

      * Given a package, return its file name without the extension.

      * @param packageDoc the package to check.

      * @return the file name of the given package.

      */

     public static String getPackageFileHeadName(PackageDoc packageDoc) {

         return packageDoc == null || packageDoc.name().length() == 0 ?

             DocletConstants.DEFAULT_PACKAGE_FILE_NAME : packageDoc.name();

     }

     /**

      * Given a string, replace all occurrences of 'newStr' with 'oldStr'.

      * @param originalStr the string to modify.

      * @param oldStr the string to replace.

      * @param newStr the string to insert in place of the old string.

      */

     public static String replaceText(String originalStr, String oldStr,

             String newStr) {

         if (oldStr == null || newStr == null || oldStr.equals(newStr)) {

             return originalStr;

         }

         return originalStr.replace(oldStr, newStr);

     }

     /**

      * Given a string, escape all special html characters and

      * return the result.

      *

      * @param s The string to check.

      * @return the original string with all of the HTML characters escaped.

      */

     public static String escapeHtmlChars(String s) {

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

             char ch = s.charAt(i);

             switch (ch) {

                 // only start building a new string if we need to

                 case '<': case '>': case '&':

                     StringBuilder sb = new StringBuilder(s.substring(0, i));

                     for ( ; i < s.length(); i++) {

                         ch = s.charAt(i);

                         switch (ch) {

                             case '<': sb.append("&lt;");  break;

                             case '>': sb.append(">");  break;

                             case '&': sb.append("&"); break;

                             default:  sb.append(ch);      break;

                         }

                     }

                     return sb.toString();

             }

         }

         return s;

     }

     /**

      * Escape all special html characters in a string buffer.

      *

      * @param sb The string buffer to update

      */

     public static void escapeHtmlChars(StringBuilder sb) {

         // scan backwards, replacing characters as needed.

         for (int i = sb.length() - 1; i >= 0; i--) {

             switch (sb.charAt(i)) {

                 case '<': sb.replace(i, i+1, "&lt;"); break;

                 case '>': sb.replace(i, i+1, ">"); break;

                 case '&': sb.replace(i, i+1, "&"); break;

             }

         }

     }

     /**

      * Given a string, strips all html characters and

      * return the result.

      *

      * @param rawString The string to check.

      * @return the original string with all of the HTML characters

      * stripped.

      *

      */

     public static String stripHtml(String rawString) {

         // remove HTML tags

         rawString = rawString.replaceAll("\\<.*?>", " ");

         // consolidate multiple spaces between a word to a single space

         rawString = rawString.replaceAll("\\b\\s{2,}\\b", " ");

         // remove extra whitespaces

         return rawString.trim();

     }

     /**

      * Given an annotation, return true if it should be documented and false

      * otherwise.

      *

      * @param annotationDoc the annotation to check.

      *

      * @return true return true if it should be documented and false otherwise.

      */

     public static boolean isDocumentedAnnotation(AnnotationTypeDoc annotationDoc) {

         AnnotationDesc[] annotationDescList = annotationDoc.annotations();

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

             if (annotationDescList[i].annotationType().qualifiedName().equals(

                    java.lang.annotation.Documented.class.getName())){

                 return true;

             }

         }

         return false;

     }

     /**

      * Return true if this class is linkable and false if we can't link to the

      * desired class.

      * <br>

      * <b>NOTE:</b>  You can only link to external classes if they are public or

      * protected.

      *

      * @param classDoc the class to check.

      * @param configuration the current configuration of the doclet.

      *

      * @return true if this class is linkable and false if we can't link to the

      * desired class.

      */

     public static boolean isLinkable(ClassDoc classDoc,

             Configuration configuration) {

         return

             ((classDoc.isIncluded() && configuration.isGeneratedDoc(classDoc))) ||

             (configuration.extern.isExternal(classDoc) &&

                 (classDoc.isPublic() || classDoc.isProtected()));

     }

     /**

      * Given a class, return the closest visible super class.

      *

      * @param classDoc the class we are searching the parent for.

      * @param configuration the current configuration of the doclet.

      * @return the closest visible super class.  Return null if it cannot

      *         be found (i.e. classDoc is java.lang.Object).

      */

     public static Type getFirstVisibleSuperClass(ClassDoc classDoc,

             Configuration configuration) {

         if (classDoc == null) {

             return null;

         }

         Type sup = classDoc.superclassType();

         ClassDoc supClassDoc = classDoc.superclass();

         while (sup != null &&

                   (! (supClassDoc.isPublic() ||

                               isLinkable(supClassDoc, configuration))) ) {

             if (supClassDoc.superclass().qualifiedName().equals(supClassDoc.qualifiedName()))

                 break;

             sup = supClassDoc.superclassType();

             supClassDoc = supClassDoc.superclass();

         }

         if (classDoc.equals(supClassDoc)) {

             return null;

         }

         return sup;

     }

     /**

      * Given a class, return the closest visible super class.

      *

      * @param classDoc the class we are searching the parent for.

      * @param configuration the current configuration of the doclet.

      * @return the closest visible super class.  Return null if it cannot

      *         be found (i.e. classDoc is java.lang.Object).

      */

     public static ClassDoc getFirstVisibleSuperClassCD(ClassDoc classDoc,

             Configuration configuration) {

         if (classDoc == null) {

             return null;

         }

         ClassDoc supClassDoc = classDoc.superclass();

         while (supClassDoc != null &&

                   (! (supClassDoc.isPublic() ||

                               isLinkable(supClassDoc, configuration))) ) {

             supClassDoc = supClassDoc.superclass();

         }

         if (classDoc.equals(supClassDoc)) {

             return null;

         }

         return supClassDoc;

     }

     /**

      * Given a ClassDoc, return the name of its type (Class, Interface, etc.).

      *

      * @param cd the ClassDoc to check.

      * @param lowerCaseOnly true if you want the name returned in lower case.

      *                      If false, the first letter of the name is capitalized.

      * @return

      */

     public static String getTypeName(Configuration config,

         ClassDoc cd, boolean lowerCaseOnly) {

         String typeName = "";

         if (cd.isOrdinaryClass()) {

             typeName = "doclet.Class";

         } else if (cd.isInterface()) {

             typeName = "doclet.Interface";

         } else if (cd.isException()) {

             typeName = "doclet.Exception";

         } else if (cd.isError()) {

             typeName = "doclet.Error";

         } else if (cd.isAnnotationType()) {

             typeName = "doclet.AnnotationType";

         } else if (cd.isEnum()) {

             typeName = "doclet.Enum";

         }

         return config.getText(

             lowerCaseOnly ? typeName.toLowerCase() : typeName);

     }

     /**

      * Replace all tabs with the appropriate number of spaces.

      * @param configuration the doclet configuration defining the setting for the

      *                      tab length.

      * @param sb the StringBuilder in which to replace the tabs

      */

     public static void replaceTabs(Configuration configuration, StringBuilder sb) {

         int tabLength = configuration.sourcetab;

         String whitespace = configuration.tabSpaces;

         int index = 0;

         while ((index = sb.indexOf("\t", index)) != -1) {

             int spaceCount = tabLength - index % tabLength;

             sb.replace(index, index+1, whitespace.substring(0, spaceCount));

             index += spaceCount;

         }

     }

     /**

      * The documentation for values() and valueOf() in Enums are set by the

      * doclet.

      */

     public static void setEnumDocumentation(Configuration configuration,

             ClassDoc classDoc) {

         MethodDoc[] methods = classDoc.methods();

         for (int j = 0; j < methods.length; j++) {

             MethodDoc currentMethod = methods[j];

             if (currentMethod.name().equals("values") &&

                 currentMethod.parameters().length == 0) {

                 currentMethod.setRawCommentText(

                     configuration.getText("doclet.enum_values_doc", classDoc.name()));

             } else if (currentMethod.name().equals("valueOf") &&

                 currentMethod.parameters().length == 1) {

                 Type paramType = currentMethod.parameters()[0].type();

                 if (paramType != null &&

                     paramType.qualifiedTypeName().equals(String.class.getName())) {

                     currentMethod.setRawCommentText(

                         configuration.getText("doclet.enum_valueof_doc"));

                 }

             }

         }

     }

     /**

      *  Return true if the given Doc is deprecated.

      *

      * @param doc the Doc to check.

      * @return true if the given Doc is deprecated.

      */

     public static boolean isDeprecated(Doc doc) {

         if (doc.tags("deprecated").length > 0) {

             return true;

         }

         AnnotationDesc[] annotationDescList;

         if (doc instanceof PackageDoc)

             annotationDescList = ((PackageDoc)doc).annotations();

         else

             annotationDescList = ((ProgramElementDoc)doc).annotations();

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

             if (annotationDescList[i].annotationType().qualifiedName().equals(

                    java.lang.Deprecated.class.getName())){

                 return true;

             }

         }

         return false;

     }

 }