Java tutorial
/** * Copyright (c) 2000-present Liferay, Inc. All rights reserved. * * This library is free software; you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the Free * Software Foundation; either version 2.1 of the License, or (at your option) * any later version. * * This library 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 Lesser General Public License for more * details. */ package com.liferay.wiki.internal.translator; import com.liferay.portal.kernel.util.CharPool; import com.liferay.portal.kernel.util.StringPool; import com.liferay.portal.kernel.util.StringUtil; import com.liferay.wiki.importer.impl.mediawiki.MediaWikiImporter; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * @author Jorge Ferrer * @author Daniel Kocsis */ public class MediaWikiToCreoleTranslator extends BaseTranslator { public static final String TABLE_OF_CONTENTS = "<<TableOfContents>>\n\n"; public MediaWikiToCreoleTranslator() { initRegexps(); initNowikiRegexps(); } public boolean isStrictImportMode() { return _strictImportMode; } public void setStrictImportMode(boolean strictImportMode) { _strictImportMode = strictImportMode; } protected void initNowikiRegexps() { // Preformat protected nowikiRegexps.add("(<nowiki>)(.*?)(</nowiki>)"); nowikiRegexps.add("(<pre>)(.*?)(</pre>)"); // Escape protected nowikiRegexps.add("~(\\*\\*|~|//|-|#|\\{\\{|}}|\\\\|~\\[~~[|]]|----|=|\\|)"); } protected void initRegexps() { // Clean unnecessary header emphasis regexps.put("= '''([^=]+)''' =", "= $1 ="); regexps.put("== '''([^=]+)''' ==", "== $1 =="); regexps.put("== '''([^=]+)''' ===", "=== $1 ==="); // Unscape angle brackets regexps.put("<", "<"); regexps.put(">", ">"); // Remove categories regexps.put("\\[\\[[Cc]ategory:([^\\]]*)\\]\\][\\n]*", ""); // Remove disambiguations regexps.put("\\{{2}OtherTopics\\|([^\\}]*)\\}{2}", StringPool.BLANK); // Remove work in progress regexps.put("\\{{2}Work in progress\\}{2}", StringPool.BLANK); // Remove references regexps.put("\\[{2}Wikipedia:([^\\]]*)\\]{2}", StringPool.BLANK); // Bold and italics regexps.put("''''((?s:.)*?)(''''|(\n\n|\r\r|\r\n\r\n))", "**//$1//**$3"); // Bold regexps.put("'''((?s:.)*?)('''|(\n\n|\r\r|\r\n\r\n))", "**$1**$3"); // Italics regexps.put("''((?s:.)*?)(''|(\n\n|\r\r|\r\n\r\n))", "//$1//$3"); // Normalize URLs regexps.put("\\[{2}((http|ftp)[^ ]*) ([^\\]]*)\\]{2}", "[$1 $3]"); // URL regexps.put("\\[((http|ftp)[^ ]*)\\]", "[[$1]]"); // URL with label regexps.put("\\[((http|ftp)[^ ]*) ([^\\]]*)\\]", "[[$1|$3]]"); // Term and definition regexps.put("^\\t([\\w]+):\\t(.*)", "**$1**:\n$2"); // Indented paragraph regexps.put("^\\t:\\t(.*)", "$1"); // Monospace regexps.put("(^ (.+))(\\n (.+))*", "{{{\n$0\n}}}"); // No wiki regexps.put("<nowiki>([^<]*)</nowiki>", "{{{$1}}}"); // HTML PRE regexps.put("<pre>([^<]*)</pre>", "{{{$1}}}"); // User reference regexps.put("[-]*\\[{2}User:([^\\]]*)\\]{2}", "$1"); } @Override protected String postProcess(String content) { if (_strictImportMode) { content = runRegexp(content, "\\{{2}Special:(.*?)\\}{2}", StringPool.BLANK); content = runRegexp(content, "\\{{2}(.*?)\\}{2}", StringPool.BLANK); content = runRegexp(content, "(?s)\\{{2}(.*?)\\}{2}", StringPool.BLANK); } else { content = runRegexp(content, "\\{{2}Special:(.*?)\\}{2}", "{{{$1}}}\n"); content = runRegexp(content, "\\{{2}(.*?)\\}{2}", "{{{$1}}}"); content = runRegexp(content, "([^\\{])(\\{{2})([^\\{])", "$1\n{{{\n$3"); content = runRegexp(content, "([^\\}])(\\}{2})([^\\}])", "$1\n}}}\n$3"); } // LEP-6118 Matcher matcher = _titlePattern.matcher(content); if (matcher.find()) { content = runRegexp(content, "^===([^=]+)===", "====$1===="); content = runRegexp(content, "^==([^=]+)==", "===$1==="); content = runRegexp(content, "^=([^=]+)=", "==$1=="); } // Remove HTML tags for (Pattern pattern : _htmlTagPatterns) { matcher = pattern.matcher(content); content = matcher.replaceAll(StringPool.BLANK); } for (String htmlTag : _HTML_TAGS) { content = StringUtil.replace(content, htmlTag, StringPool.BLANK); } // Images matcher = _imagePattern.matcher(content); StringBuffer sb = new StringBuffer(content); int level = 0; int offset = 0; int originalLength = 0; int prefixLength = 0; while (matcher.find()) { level = 0; prefixLength = matcher.end(2) - matcher.start(2); for (int i = matcher.start(0) + offset; i < sb.length() - 1; i++) { if ((sb.charAt(i) == '[') && (sb.charAt(i + 1) == '[')) { level++; } else if ((sb.charAt(i) == ']') && (sb.charAt(i + 1) == ']')) { level--; if (level == 0) { originalLength = (i + 2) - (matcher.start(0) + offset); break; } } } int imageStartPos = matcher.end(3) + offset; int imageEndPos = matcher.start(2) + offset + originalLength - 4; String image = "{{" + MediaWikiImporter.SHARED_IMAGES_TITLE + "/" + StringUtil.toLowerCase(sb.substring(imageStartPos, imageEndPos)) + "}}"; int imageLength = image.length(); image = StringUtil.replace(image, "[[", StringPool.BLANK); image = StringUtil.replace(image, "]]", StringPool.BLANK); sb.replace(matcher.start(0) + offset, matcher.start(0) + originalLength + offset, image); offset += MediaWikiImporter.SHARED_IMAGES_TITLE.length() - prefixLength - (imageLength - image.length()); } content = sb.toString(); // Tables matcher = _tablePattern.matcher(content); sb = new StringBuffer(content); String mediaWikiTable = null; offset = 0; originalLength = 0; while (matcher.find()) { mediaWikiTable = sb.substring(matcher.start(1) + offset, matcher.end(1) + offset); originalLength = mediaWikiTable.length() + 4; Matcher matcher1 = _mediaWikiTablePattern1.matcher(mediaWikiTable); mediaWikiTable = matcher1.replaceAll(StringPool.BLANK); Matcher matcher2 = _mediaWikiTablePattern2.matcher(mediaWikiTable); mediaWikiTable = matcher2.replaceAll("$1"); Matcher matcher3 = _mediaWikiTablePattern3.matcher(mediaWikiTable); mediaWikiTable = matcher3.replaceAll("===$1==="); Matcher matcher4 = _mediaWikiTablePattern4.matcher(mediaWikiTable); mediaWikiTable = matcher4.replaceAll("|=$1|"); mediaWikiTable = StringUtil.replace(mediaWikiTable, CharPool.NEW_LINE, StringPool.BLANK); mediaWikiTable = StringUtil.replace(mediaWikiTable, CharPool.RETURN, StringPool.BLANK); mediaWikiTable = StringUtil.replace(mediaWikiTable, "|-", "\n\r"); mediaWikiTable = StringUtil.replace(mediaWikiTable, "||", "|"); mediaWikiTable = StringUtil.replace(mediaWikiTable, "////", StringPool.BLANK); sb.replace(matcher.start(0) + offset, matcher.start(0) + originalLength + offset, mediaWikiTable); offset += mediaWikiTable.length() - originalLength; } content = sb.toString(); content = runRegexp(content, "/{2}(\\{{3})", "$1"); content = runRegexp(content, "(\\}{3})/{2}", "$1"); // Remove underscores from links matcher = _linkPattern.matcher(content); sb = new StringBuffer(content); while (matcher.find()) { String link = matcher.group(1).replace(StringPool.UNDERLINE, StringPool.SPACE); sb.replace(matcher.start(1), matcher.end(1), link); } return TABLE_OF_CONTENTS + super.postProcess(sb.toString()); } private static final String[] _HTML_TAGS = { "<blockquote>", "</blockquote>", "<br>", "<br/>", "<br />", "<center>", "</center>", "<cite>", "</cite>", "<code>", "</code>", "</div>", "</font>", "<hr>", "<hr/>", "<hr />", "<p>", "</p>", "<tt>", "</tt>", "<var>", "</var>" }; private final Pattern[] _htmlTagPatterns = { Pattern.compile("<div[^>]*>"), Pattern.compile("<font[^>]*>") }; private final Pattern _imagePattern = Pattern.compile("(\\[{2})(Image|File)(:)", Pattern.DOTALL); private final Pattern _linkPattern = Pattern.compile("\\[{2}([^\\]]*)\\]{2}", Pattern.DOTALL); private final Pattern _mediaWikiTablePattern1 = Pattern.compile("class=(.*?)[|\n\r]"); private final Pattern _mediaWikiTablePattern2 = Pattern.compile("(\\|\\-)(.*)"); private final Pattern _mediaWikiTablePattern3 = Pattern.compile("\\|\\+(.*)"); private final Pattern _mediaWikiTablePattern4 = Pattern.compile("(?m)^!(.+)"); private boolean _strictImportMode; private final Pattern _tablePattern = Pattern.compile("\\{\\|(.*?)\\|\\}", Pattern.DOTALL); private final Pattern _titlePattern = Pattern.compile("^=([^=]+)=", Pattern.MULTILINE); }