src/main/java/eu/etaxonomy/cdm/vaadin/util/converter/UrlStringConverter.java

   1 /**
   2 * Copyright (C) 2017 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9 package eu.etaxonomy.cdm.vaadin.util.converter;
  10
  11 import java.util.Locale;
  12
  13 import com.vaadin.data.util.converter.Converter;
  14
  15 /**
  16  * Creates a link from the values in the column.
  17  *
  18  * @author a.kohlbecker
  19  * @since Mar 7, 2017
  20  *
  21  */
  22 public final class UrlStringConverter implements Converter<String, String> {
  23
  24     private String regex = null;
  25     private String replacement = "";
  26
  27     public UrlStringConverter() {
  28
  29     }
  30
  31     /**
  32      * @param regex Regular expression for creating an alternative label by string replacement on the value.
  33      *  This is optional. No string replacement will be done when this is <code>null</code>.
  34      */
  35     public UrlStringConverter(String regex) {
  36         this(regex, null);
  37     }
  38
  39     /**
  40      * @param regex Regular expression for creating an alternative label by string replacement on the value.
  41      *  This is optional. No string replacement will be done when this is <code>null</code>.
  42      * @param replacement The replacement to be used with the <code>regex</code>.
  43      * Defaults to an empty string when null.
  44      */
  45     public UrlStringConverter(String regex, String replacement) {
  46         this.regex = regex;
  47         if(replacement != null){
  48             this.replacement = replacement;
  49         }
  50     }
  51
  52     @Override
  53     public String convertToModel(String value, Class<? extends String> targetType, Locale locale)
  54             throws com.vaadin.data.util.converter.Converter.ConversionException {
  55         return null;
  56     }
  57
  58     @Override
  59     public String convertToPresentation(String value, Class<? extends String> targetType, Locale locale)
  60             throws com.vaadin.data.util.converter.Converter.ConversionException {
  61         String label = value;
  62         if(regex != null){
  63             label = label.replace(regex, replacement);
  64         }
  65         return "<a href=\"" + value + "\" target=\"external\">" + label + "</a>";
  66     }
  67
  68     @Override
  69     public Class<String> getModelType() {
  70         return String.class;
  71     }
  72
  73     @Override
  74     public Class<String> getPresentationType() {
  75         return String.class;
  76     }
  77 }