source: trunk/gsdl3/src/java/org/greenstone/gsdl3/util/XSLTUtil.java@ 13270

package org.greenstone.gsdl3.util;

import java.util.Date;
import java.util.Locale;
import java.text.SimpleDateFormat;

import org.apache.log4j.*;

/** a class to contain various static methods that are used by the xslt
 * stylesheets
 */
public class XSLTUtil {

     static Logger logger = Logger.getLogger(org.greenstone.gsdl3.util.XSLTUtil.class.getName());

    /* some tests */
    public static boolean equals(String s1, String s2) {
    return s1.equals(s2);
    }
    public static boolean notEquals(String s1, String s2) {
    return !s1.equals(s2);
    }
    public static boolean exists(String s1, String s2) {
    return !s1.equals("");
    }
    public static boolean contains(String s1, String s2) {
    return (s1.indexOf(s2) != -1);
    }
    public static boolean startsWith(String s1, String s2) {
    return s1.startsWith(s2);
    }
    public static boolean endsWith(String s1, String s2) {
    return s1.endsWith(s2);
    }
    public static boolean lessThan(String s1, String s2) {
    return (s1.compareTo(s2) < 0);
    }
    public static boolean lessThanOrEquals(String s1, String s2) {
    return (s1.compareTo(s2) <= 0);
    }
    public static boolean greaterThan(String s1, String s2) {
    return (s1.compareTo(s2) > 0);
    }
    public static boolean greaterThanOrEquals(String s1, String s2) {
    return (s1.compareTo(s2) >= 0);
    }

    /* some preprocessing functions */
    public static String toLower(String orig) {
    return orig.toLowerCase();
    }
    public static String toUpper(String orig) {
    return orig.toUpperCase();
    }

    public static byte[] toUTF8(String orig) {
    
    try {
        byte[] utf8 = orig.getBytes("UTF-8");
        return utf8;
    }
    catch (Exception e){
        logger.error("unsupported encoding");
        return orig.getBytes();
    }
    }

    public static String getNumberedItem(String list, int number) {
    String [] items = list.split(",", -1);  
    if (items.length > number) {
        return items[number];
    }
    return ""; // index out of bounds
    }

    
    public static String tidyWhitespace(String original) {
    
    if (original==null || original.equals("")) {
        return original;
    }
    String new_s = original.replaceAll("\\s+", " ");
    return new_s;
    }


    public static String getInterfaceText(String interface_name, String lang, String key) {
    return getInterfaceText(interface_name, lang, key, null);
    }
    public static String getInterfaceText(String interface_name, String lang, String key, String args_str) {
    String [] args = null;
    if (args_str!=null && !args_str.equals("")) {
        args = args_str.split(";");
    }
    Dictionary dict = new Dictionary("interface_"+interface_name, lang);
        String result = dict.get(key, args);

    if (result == null && !interface_name.equals("default")) { // not found, try the default interface
        dict = new Dictionary("interface_default", lang);
        result = dict.get(key, args);
    }
        
        if (result == null) { // not found
            return "_"+key+"_";
        }
        return result;
    }

    public static boolean isImage(String mimetype) {
    if (mimetype.startsWith("image/")) {
        return true;
    }
    return false;
    }

    public static String formatDate(String date, String lang) {
    
    String in_pattern = "yyyyMMdd";
    String out_pattern = "dd MMMM yyyy";
    if (date.length()==6) {
        in_pattern = "yyyyMM";
    }
    
    SimpleDateFormat formatter = new SimpleDateFormat(in_pattern, new Locale(lang));
    try {
        Date d = formatter.parse(date);
        formatter.applyPattern(out_pattern);
        String new_date = formatter.format(d);
        return new_date;
    } catch (Exception e) {
        return date;
    }
    
    }

    public static String formatLanguage(String display_lang, String lang) {

    return new Locale(display_lang).getDisplayLanguage(new Locale(lang));
    }

    public static String cgiSafe(String original, String lang) {

    original = original.replace('&', ' ');
    original = original.replaceAll(" ", "%20");
    return original;
    }
}