Android Open Source - FAST Umlaut Converter

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Back to project page FAST.

License

The source code is released under:

GNU General Public License

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Java Source Code

package org.ligi.fast.util;
/*w w w.j  a  v a 2 s  .c  om*/
import java.util.HashMap;
import java.util.Map;

public class UmlautConverter {

    public final static Map<String, String> REPLACEMENT_MAP = new HashMap<String, String>() {{

        // german
        put("", "ue");
        put("", "oe");
        put("", "ae");
        put("", "ss");

        // greek
        put("?", "?");
        put("?", "?");
        put("?", "?");
        put("?", "?");
        put("?", "?");
        put("??", "?");
        put("?", "w");
        /*
        we do not need UpperCase as for searching

        put("?","?");
        put("?", "?");
        put("?", "?");
        put("?", "?");
        put("?", "?");
        put("?", "?");
        put("?", "??");groovy:000> "??".toLowerCase(); ===> ?
        */

        // spanish - credits Rubn Gmez ruben.gomez@canselleiro.org
        put("", "a");
        put("", "e");
        put("", "i");
        put("", "n");
        put("", "o");
        put("", "u");

    }};


    public static String replaceAllUmlauts(String input) {
        String output = input;

        for (Map.Entry<String, String> entry : REPLACEMENT_MAP.entrySet()) {
            /*
             * fun fact when there are 2 methods replace(..) and replaceAll(..)
             * and you want to replace all occurrences you would take the later
             * which is not totally wrong ( is doing the right thing )
             * but replace(..) is also doing the right thing but way faster ;-)
             */
            output = output.replace(entry.getKey(), entry.getValue());
        }

        return output;
    }

    public static String replaceAllUmlautsReturnNullIfEqual(String input) {
        String output = replaceAllUmlauts(input);

        if (output.equals(input)) {
            return null;
        }

        return output;
    }

}

Java Source Code List