XMLUtils.java

package es.alvsanand.webpage.common;

import java.util.HashMap;
import java.util.Map;

import com.google.appengine.api.datastore.Text;

public class XMLUtils {
	private final static Map<String, String> AUTO_CLOSED_HTML_TAGS;

	static {
		AUTO_CLOSED_HTML_TAGS = new HashMap<String, String>();

		AUTO_CLOSED_HTML_TAGS.put("<br([^>]*)>", "<br/>");
		AUTO_CLOSED_HTML_TAGS.put("<hr([^>]*)>", "<hr/>");
	}
	
	private final static Map<String, String> HTML_XML_ENTITIES;

	static {
		HTML_XML_ENTITIES = new HashMap<String, String>();

		HTML_XML_ENTITIES.put("& ", "& ");
		HTML_XML_ENTITIES.put(""", """);
		HTML_XML_ENTITIES.put("&", "&");
		HTML_XML_ENTITIES.put("<", "<");
		HTML_XML_ENTITIES.put(">", ">");
		HTML_XML_ENTITIES.put(" ", " ");
		HTML_XML_ENTITIES.put("¡", "¡");
		HTML_XML_ENTITIES.put("¢", "¢");
		HTML_XML_ENTITIES.put("£", "£");
		HTML_XML_ENTITIES.put("¤", "¤");
		HTML_XML_ENTITIES.put("¥", "¥");
		HTML_XML_ENTITIES.put("¦", "¦");
		HTML_XML_ENTITIES.put("§", "§");
		HTML_XML_ENTITIES.put("¨", "¨");
		HTML_XML_ENTITIES.put("©", "©");
		HTML_XML_ENTITIES.put("ª", "ª");
		HTML_XML_ENTITIES.put("«", "«");
		HTML_XML_ENTITIES.put("¬", "¬");
		HTML_XML_ENTITIES.put("­", "­");
		HTML_XML_ENTITIES.put("®", "®");
		HTML_XML_ENTITIES.put("¯", "¯");
		HTML_XML_ENTITIES.put("°", "°");
		HTML_XML_ENTITIES.put("±", "±");
		HTML_XML_ENTITIES.put("²", "²");
		HTML_XML_ENTITIES.put("³", "³");
		HTML_XML_ENTITIES.put("´", "´");
		HTML_XML_ENTITIES.put("µ", "µ");
		HTML_XML_ENTITIES.put("¶", "¶");
		HTML_XML_ENTITIES.put("·", "·");
		HTML_XML_ENTITIES.put("¸", "¸");
		HTML_XML_ENTITIES.put("¹", "¹");
		HTML_XML_ENTITIES.put("º", "º");
		HTML_XML_ENTITIES.put("»", "»");
		HTML_XML_ENTITIES.put("¼", "¼");
		HTML_XML_ENTITIES.put("½", "½");
		HTML_XML_ENTITIES.put("¾", "¾");
		HTML_XML_ENTITIES.put("¿", "¿");
		HTML_XML_ENTITIES.put("À", "À");
		HTML_XML_ENTITIES.put("Á", "Á");
		HTML_XML_ENTITIES.put("Â", "Â");
		HTML_XML_ENTITIES.put("Ã", "Ã");
		HTML_XML_ENTITIES.put("Ä", "Ä");
		HTML_XML_ENTITIES.put("Å", "Å");
		HTML_XML_ENTITIES.put("Æ", "Æ");
		HTML_XML_ENTITIES.put("Ç", "Ç");
		HTML_XML_ENTITIES.put("È", "È");
		HTML_XML_ENTITIES.put("É", "É");
		HTML_XML_ENTITIES.put("Ê", "Ê");
		HTML_XML_ENTITIES.put("Ë", "Ë");
		HTML_XML_ENTITIES.put("Ì", "Ì");
		HTML_XML_ENTITIES.put("Í", "Í");
		HTML_XML_ENTITIES.put("Î", "Î");
		HTML_XML_ENTITIES.put("Ï", "Ï");
		HTML_XML_ENTITIES.put("Ð", "Ð");
		HTML_XML_ENTITIES.put("Ñ", "Ñ");
		HTML_XML_ENTITIES.put("Ò", "Ò");
		HTML_XML_ENTITIES.put("Ó", "Ó");
		HTML_XML_ENTITIES.put("Ô", "Ô");
		HTML_XML_ENTITIES.put("Õ", "Õ");
		HTML_XML_ENTITIES.put("Ö", "Ö");
		HTML_XML_ENTITIES.put("×", "×");
		HTML_XML_ENTITIES.put("Ø", "Ø");
		HTML_XML_ENTITIES.put("Ù", "Ù");
		HTML_XML_ENTITIES.put("Ú", "Ú");
		HTML_XML_ENTITIES.put("Û", "Û");
		HTML_XML_ENTITIES.put("Ü", "Ü");
		HTML_XML_ENTITIES.put("Ý", "Ý");
		HTML_XML_ENTITIES.put("Þ", "Þ");
		HTML_XML_ENTITIES.put("ß", "ß");
		HTML_XML_ENTITIES.put("à", "à");
		HTML_XML_ENTITIES.put("á", "á");
		HTML_XML_ENTITIES.put("â", "â");
		HTML_XML_ENTITIES.put("ã", "ã");
		HTML_XML_ENTITIES.put("ä", "ä");
		HTML_XML_ENTITIES.put("å", "å");
		HTML_XML_ENTITIES.put("æ", "æ");
		HTML_XML_ENTITIES.put("ç", "ç");
		HTML_XML_ENTITIES.put("è", "è");
		HTML_XML_ENTITIES.put("é", "é");
		HTML_XML_ENTITIES.put("ê", "ê");
		HTML_XML_ENTITIES.put("ë", "ë");
		HTML_XML_ENTITIES.put("ì", "ì");
		HTML_XML_ENTITIES.put("í", "í");
		HTML_XML_ENTITIES.put("î", "î");
		HTML_XML_ENTITIES.put("ï", "ï");
		HTML_XML_ENTITIES.put("ð", "ð");
		HTML_XML_ENTITIES.put("ñ", "ñ");
		HTML_XML_ENTITIES.put("ò", "ò");
		HTML_XML_ENTITIES.put("ó", "ó");
		HTML_XML_ENTITIES.put("ô", "ô");
		HTML_XML_ENTITIES.put("õ", "õ");
		HTML_XML_ENTITIES.put("ö", "ö");
		HTML_XML_ENTITIES.put("÷", "÷");
		HTML_XML_ENTITIES.put("ø", "ø");
		HTML_XML_ENTITIES.put("ù", "ù");
		HTML_XML_ENTITIES.put("ú", "ú");
		HTML_XML_ENTITIES.put("û", "û");
		HTML_XML_ENTITIES.put("ü", "ü");
		HTML_XML_ENTITIES.put("ý", "ý");
		HTML_XML_ENTITIES.put("þ", "þ");
		HTML_XML_ENTITIES.put("ÿ", "ÿ");
		HTML_XML_ENTITIES.put("€", "€");
	}
	
	public static String getFullArticleData(Text articleData){		
		if(articleData==null){
			return null;
		}
		
		String dataValue = articleData.getValue();
		
		if(dataValue==null){
			return null;
		}
		
		return repareText(dataValue.replaceFirst(Globals.ARTICLE_DATA_DELIMITER_REGEXP, ""));
	}
	
	public static String getResumeArticleData(Text articleData){
		if(articleData==null){
			return null;
		}
		
		String dataValue = articleData.getValue();
		
		if(dataValue==null){
			return null;
		}
		
		int lasResumeLastCharacterPosition = dataValue.indexOf(Globals.ARTICLE_DATA_DELIMITER);
		
		if(lasResumeLastCharacterPosition>-1){
			return repareText(dataValue.substring(0, lasResumeLastCharacterPosition));
		}
		else{
			return repareText(dataValue);
		}
	}
	

	public static String repareText(String text){
		return convertHTMLToXMLEntities(repareAutoClosedHTMLTags(text));
	}

	private static String convertHTMLToXMLEntities(String text){
		StringBuilder stringBuilderText = new StringBuilder(text);
		
		for(String htmlEntity: HTML_XML_ENTITIES.keySet()){
			replaceString(stringBuilderText, htmlEntity.toLowerCase(), HTML_XML_ENTITIES.get(htmlEntity));
			replaceString(stringBuilderText, htmlEntity.toUpperCase(), HTML_XML_ENTITIES.get(htmlEntity));
		}		
		
		return stringBuilderText.toString();
	}

	private static String repareAutoClosedHTMLTags(final String text){
		String textAux = new String(text);
		for(String tag: AUTO_CLOSED_HTML_TAGS.keySet()){
			textAux = textAux.replaceAll(tag, AUTO_CLOSED_HTML_TAGS.get(tag));
		}
		
		return textAux;
	}
	
	private static StringBuilder replaceString(StringBuilder text, String search, String replace) {
		int fromIndex = 0;

		int start = text.indexOf(search, fromIndex);
		if (start == -1) {
			return text;
		}

		if (replace.length() > 0) {
			int end = 0;

			int endAdjust = (search.length() - replace.length());
			do {
				end = (start + replace.length()) + endAdjust;
				text.replace(start, end, replace);
				fromIndex = end;
			} while ((start = text.indexOf(search, fromIndex)) != -1);
		} else {
			do {
				text.delete(start, search.length());
				fromIndex = start + replace.length();
			} while ((start = text.indexOf(search, fromIndex)) != -1);
		}

		return text;
	}
}