/*

 * 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;

import java.io.*;

import java.util.*;

import com.sun.javadoc.*;

import com.sun.tools.doclets.internal.toolkit.builders.BuilderFactory;

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

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

import javax.tools.JavaFileManager;

/**

 * Configure the output based on the options. Doclets should sub-class

 * Configuration, to configure and add their own options. This class contains

 * all user options which are supported by the 1.1 doclet and the standard

 * 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>

 *

 * @author Robert Field.

 * @author Atul Dambalkar.

 * @author Jamie Ho

 */

public abstract class Configuration {

    /**

     * The factory for builders.

     */

    protected BuilderFactory builderFactory;

    /**

     * The taglet manager.

     */

    public TagletManager tagletManager;

    /**

     * The path to the builder XML input file.

     */

    public String builderXMLPath;

    /**

     * The default path to the builder XML.

     */

    private static final String DEFAULT_BUILDER_XML = "resources/doclet.xml";

    /**

     * The path to Taglets

     */

    public String tagletpath = "";

    /**

     * This is true if option "-serialwarn" is used. Defualt value is false to

     * suppress excessive warnings about serial tag.

     */

    public boolean serialwarn = false;

    /**

     * The specified amount of space between tab stops.

     */

    public int sourcetab;

    public String tabSpaces;

    /**

     * True if we should generate browsable sources.

     */

    public boolean linksource = false;

    /**

     * True if command line option "-nosince" is used. Default value is

     * false.

     */

    public boolean nosince = false;

    /**

     * True if we should recursively copy the doc-file subdirectories

     */

    public boolean copydocfilesubdirs = false;

    /**

     * The META charset tag used for cross-platform viewing.

     */

    public String charset = "";

    /**

     * True if user wants to add member names as meta keywords.

     * Set to false because meta keywords are ignored in general

     * by most Internet search engines.

     */

    public boolean keywords = false;

    /**

     * The meta tag keywords instance.

     */

    public final MetaKeywords metakeywords = new MetaKeywords(this);

    /**

     * The list of doc-file subdirectories to exclude

     */

    protected Set<String> excludedDocFileDirs;

    /**

     * The list of qualifiers to exclude

     */

    protected Set<String> excludedQualifiers;

    /**

     * The Root of the generated Program Structure from the Doclet API.

     */

    public RootDoc root;

    /**

     * Destination directory name, in which doclet will generate the entire

     * documentation. Default is current directory.

     */

    public String destDirName = "";

    /**

     * Destination directory name, in which doclet will copy the doc-files to.

     */

    public String docFileDestDirName = "";

    /**

     * Encoding for this document. Default is default encoding for this

     * platform.

     */

    public String docencoding = null;

    /**

     * True if user wants to suppress descriptions and tags.

     */

    public boolean nocomment = false;

    /**

     * Encoding for this document. Default is default encoding for this

     * platform.

     */

    public String encoding = null;

    /**

     * Generate author specific information for all the classes if @author

     * tag is used in the doc comment and if -author option is used.

     * <code>showauthor</code> is set to true if -author option is used.

     * Default is don't show author information.

     */

    public boolean showauthor = false;

    /**

     * Generate version specific information for the all the classes

     * if @version tag is used in the doc comment and if -version option is

     * used. <code>showversion</code> is set to true if -version option is

     * used.Default is don't show version information.

     */

    public boolean showversion = false;

    /**

     * Sourcepath from where to read the source files. Default is classpath.

     *

     */

    public String sourcepath = "";

    /**

     * Don't generate deprecated API information at all, if -nodeprecated

     * option is used. <code>nodepracted</code> is set to true if

     * -nodeprecated option is used. Default is generate deprected API

     * information.

     */

    public boolean nodeprecated = false;

    /**

     * The catalog of classes specified on the command-line

     */

    public ClassDocCatalog classDocCatalog;

    /**

     * Message Retriever for the doclet, to retrieve message from the resource

     * file for this Configuration, which is common for 1.1 and standard

     * doclets.

     *

     * TODO:  Make this private!!!

     */

    public MessageRetriever message = null;

    /**

     * True if user wants to suppress time stamp in output.

     * Default is false.

     */

    public boolean notimestamp= false;

    /**

     * The package grouping instance.

     */

    public final Group group = new Group(this);

    /**

     * The tracker of external package links.

     */

    public final Extern extern = new Extern(this);

    /**

     * Return the build date for the doclet.

     */

    public abstract String getDocletSpecificBuildDate();

    /**

     * This method should be defined in all those doclets(configurations),

     * which want to derive themselves from this Configuration. This method

     * can be used to set its own command line options.

     *

     * @param options The array of option names and values.

     * @throws DocletAbortException

     */

    public abstract void setSpecificDocletOptions(String[][] options);

    /**

     * Return the doclet specific {@link MessageRetriever}

     * @return the doclet specific MessageRetriever.

     */

    public abstract MessageRetriever getDocletSpecificMsg();

    /**

     * An array of the packages specified on the command-line merged

     * with the array of packages that contain the classes specified on the

     * command-line.  The array is sorted.

     */

    public PackageDoc[] packages;

    /**

     * Constructor. Constructs the message retriever with resource file.

     */

    public Configuration() {

        message =

            new MessageRetriever(this,

            "com.sun.tools.doclets.internal.toolkit.resources.doclets");

        excludedDocFileDirs = new HashSet<String>();

        excludedQualifiers = new HashSet<String>();

        setTabWidth(DocletConstants.DEFAULT_TAB_STOP_LENGTH);

    }

    /**

     * Return the builder factory for this doclet.

     *

     * @return the builder factory for this doclet.

     */

    public BuilderFactory getBuilderFactory() {

        if (builderFactory == null) {

            builderFactory = new BuilderFactory(this);

        }

        return builderFactory;

    }

    /**

     * This method should be defined in all those doclets

     * which want to inherit from this Configuration. This method

     * should return the number of arguments to the command line

     * option (including the option name).  For example,

     * -notimestamp is a single-argument option, so this method would

     * return 1.

     *

     * @param option Command line option under consideration.

     * @return number of arguments to option (including the

     * option name). Zero return means option not known.

     * Negative value means error occurred.

     */

    public int optionLength(String option) {

        option = option.toLowerCase();

        if (option.equals("-author") ||

            option.equals("-docfilessubdirs") ||

            option.equals("-keywords") ||

            option.equals("-linksource") ||

            option.equals("-nocomment") ||

            option.equals("-nodeprecated") ||

            option.equals("-nosince") ||

            option.equals("-notimestamp") ||

            option.equals("-quiet") ||

            option.equals("-xnodate") ||

            option.equals("-version")) {

            return 1;

        } else if (option.equals("-d") ||

                   option.equals("-docencoding") ||

                   option.equals("-encoding") ||

                   option.equals("-excludedocfilessubdir") ||

                   option.equals("-link") ||

                   option.equals("-sourcetab") ||

                   option.equals("-noqualifier") ||

                   option.equals("-output") ||

                   option.equals("-sourcepath") ||

                   option.equals("-tag") ||

                   option.equals("-taglet") ||

                   option.equals("-tagletpath")) {

            return 2;

        } else if (option.equals("-group") ||

                   option.equals("-linkoffline")) {

            return 3;

        } else {

            return -1;  // indicate we don't know about it

        }

    }

    /**

     * Perform error checking on the given options.

     *

     * @param options  the given options to check.

     * @param reporter the reporter used to report errors.

     */

    public abstract boolean validOptions(String options[][],

        DocErrorReporter reporter);

    private void initPackageArray() {

        Set<PackageDoc> set = new HashSet<PackageDoc>(Arrays.asList(root.specifiedPackages()));

        ClassDoc[] classes = root.specifiedClasses();

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

            set.add(classes[i].containingPackage());

        }

        ArrayList<PackageDoc> results = new ArrayList<PackageDoc>(set);

        Collections.sort(results);

        packages = results.toArray(new PackageDoc[] {});

    }

    /**

     * Set the command line options supported by this configuration.

     *

     * @param options the two dimensional array of options.

     */

    public void setOptions(String[][] options) {

        LinkedHashSet<String[]> customTagStrs = new LinkedHashSet<String[]>();

        for (int oi = 0; oi < options.length; ++oi) {

            String[] os = options[oi];

            String opt = os[0].toLowerCase();

            if (opt.equals("-d")) {

                destDirName = addTrailingFileSep(os[1]);

                docFileDestDirName = destDirName;

            } else if (opt.equals("-docfilessubdirs")) {

                copydocfilesubdirs = true;

            } else if (opt.equals("-docencoding")) {

                docencoding = os[1];

            } else if (opt.equals("-encoding")) {

                encoding = os[1];

            } else if (opt.equals("-author")) {

                showauthor = true;

            } else if (opt.equals("-nosince")) {

                nosince = true;

            } else if (opt.equals("-version")) {

                showversion = true;

            } else if (opt.equals("-nodeprecated")) {

                nodeprecated = true;

            } else if (opt.equals("-sourcepath")) {

                sourcepath = os[1];

            } else if (opt.equals("-classpath") &&

                       sourcepath.length() == 0) {

                sourcepath = os[1];

            } else if (opt.equals("-excludedocfilessubdir")) {

                addToSet(excludedDocFileDirs, os[1]);

            } else if (opt.equals("-noqualifier")) {

                addToSet(excludedQualifiers, os[1]);

            } else if (opt.equals("-linksource")) {

                linksource = true;

            } else if (opt.equals("-sourcetab")) {

                linksource = true;

                try {

                    setTabWidth(Integer.parseInt(os[1]));

                } catch (NumberFormatException e) {

                    //Set to -1 so that warning will be printed

                    //to indicate what is valid argument.

                    sourcetab = -1;

                }

                if (sourcetab <= 0) {

                    message.warning("doclet.sourcetab_warning");

                    setTabWidth(DocletConstants.DEFAULT_TAB_STOP_LENGTH);

                }

            } else if (opt.equals("-notimestamp")) {

                notimestamp = true;

            } else if (opt.equals("-nocomment")) {

                nocomment = true;

            } else if (opt.equals("-tag") || opt.equals("-taglet")) {

                customTagStrs.add(os);

            } else if (opt.equals("-tagletpath")) {

                tagletpath = os[1];

            } else if (opt.equals("-keywords")) {

                keywords = true;

            } else if (opt.equals("-serialwarn")) {

                serialwarn = true;

            } else if (opt.equals("-group")) {

                group.checkPackageGroups(os[1], os[2]);

            } else if (opt.equals("-link")) {

                String url = os[1];

                extern.link(url, url, root, false);

            } else if (opt.equals("-linkoffline")) {

                String url = os[1];

                String pkglisturl = os[2];

                extern.link(url, pkglisturl, root, true);

            }

        }

        if (sourcepath.length() == 0) {

            sourcepath = System.getProperty("env.class.path") == null ? "" :

                System.getProperty("env.class.path");

        }

        if (docencoding == null) {

            docencoding = encoding;

        }

        classDocCatalog = new ClassDocCatalog(root.specifiedClasses(), this);

        initTagletManager(customTagStrs);

    }

    /**

     * Set the command line options supported by this configuration.

     *

     * @throws DocletAbortException

     */

    public void setOptions() {

        initPackageArray();

        setOptions(root.options());

        setSpecificDocletOptions(root.options());

    }

    /**

     * Initialize the taglet manager.  The strings to initialize the simple custom tags should

     * be in the following format:  "[tag name]:[location str]:[heading]".

     * @param customTagStrs the set two dimensional arrays of strings.  These arrays contain

     * either -tag or -taglet arguments.

     */

    private void initTagletManager(Set<String[]> customTagStrs) {

        tagletManager = tagletManager == null ?

            new TagletManager(nosince, showversion, showauthor, message) :

            tagletManager;

        String[] args;

        for (Iterator<String[]> it = customTagStrs.iterator(); it.hasNext(); ) {

            args = it.next();

            if (args[0].equals("-taglet")) {

                tagletManager.addCustomTag(args[1], getFileManager(), tagletpath);

                continue;

            }

            String[] tokens = tokenize(args[1],

                TagletManager.SIMPLE_TAGLET_OPT_SEPARATOR, 3);

            if (tokens.length == 1) {

                String tagName = args[1];

                if (tagletManager.isKnownCustomTag(tagName)) {

                    //reorder a standard tag

                    tagletManager.addNewSimpleCustomTag(tagName, null, "");

                } else {

                    //Create a simple tag with the heading that has the same name as the tag.

                    StringBuilder heading = new StringBuilder(tagName + ":");

                    heading.setCharAt(0, Character.toUpperCase(tagName.charAt(0)));

                    tagletManager.addNewSimpleCustomTag(tagName, heading.toString(), "a");

                }

            } else if (tokens.length == 2) {

                //Add simple taglet without heading, probably to excluding it in the output.

                tagletManager.addNewSimpleCustomTag(tokens[0], tokens[1], "");

            } else if (tokens.length >= 3) {

                tagletManager.addNewSimpleCustomTag(tokens[0], tokens[2], tokens[1]);

            } else {

                message.error("doclet.Error_invalid_custom_tag_argument", args[1]);

            }

        }

    }

    /**

     * Given a string, return an array of tokens.  The separator can be escaped

     * with the '\' character.  The '\' character may also be escaped by the

     * '\' character.

     *

     * @param s         the string to tokenize.

     * @param separator the separator char.

     * @param maxTokens the maximum number of tokens returned.  If the

     *                  max is reached, the remaining part of s is appended

     *                  to the end of the last token.

     *

     * @return an array of tokens.

     */

    private String[] tokenize(String s, char separator, int maxTokens) {

        List<String> tokens = new ArrayList<String>();

        StringBuilder  token = new StringBuilder ();

        boolean prevIsEscapeChar = false;

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

            int currentChar = s.codePointAt(i);

            if (prevIsEscapeChar) {

                // Case 1:  escaped character

                token.appendCodePoint(currentChar);

                prevIsEscapeChar = false;

            } else if (currentChar == separator && tokens.size() < maxTokens-1) {

                // Case 2:  separator

                tokens.add(token.toString());

                token = new StringBuilder();

            } else if (currentChar == '\\') {

                // Case 3:  escape character

                prevIsEscapeChar = true;