EDIT

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.vaadin.util.converter;

import java.util.Locale;

import com.vaadin.data.util.converter.Converter;

/**

 * Creates a link from the values in the column.

 *

 * @author a.kohlbecker

 * @since Mar 7, 2017

 *

 */

public final class UrlStringConverter implements Converter<String, String> {

    private String regex = null;

    private String replacement = "";

    public UrlStringConverter() {

    }

    /**

     * @param regex Regular expression for creating an alternative label by string replacement on the value.

     *  This is optional. No string replacement will be done when this is <code>null</code>.

     */

    public UrlStringConverter(String regex) {

        this(regex, null);

    }

    /**

     * @param regex Regular expression for creating an alternative label by string replacement on the value.

     *  This is optional. No string replacement will be done when this is <code>null</code>.

     * @param replacement The replacement to be used with the <code>regex</code>.

     * Defaults to an empty string when null.

     */

    public UrlStringConverter(String regex, String replacement) {

        this.regex = regex;

        if(replacement != null){

            this.replacement = replacement;

        }

    }

    @Override

    public String convertToModel(String value, Class<? extends String> targetType, Locale locale)

            throws com.vaadin.data.util.converter.Converter.ConversionException {

        return null;

    }

    @Override

    public String convertToPresentation(String value, Class<? extends String> targetType, Locale locale)

            throws com.vaadin.data.util.converter.Converter.ConversionException {

        String label = value;

        if(regex != null){

            label = label.replace(regex, replacement);

        }

        return "<a href=\"" + value + "\" target=\"external\">" + label + "</a>";

    }

    @Override

    public Class<String> getModelType() {

        return String.class;

    }

    @Override

    public Class<String> getPresentationType() {

        return String.class;

    }

}