src/main/java/eu/svjatoslav/commons/network/navigation/NavigationItem.java

   1 package eu.svjatoslav.commons.network.navigation;
   2
   3 import java.util.ArrayList;
   4 import java.util.HashMap;
   5 import java.util.List;
   6 import java.util.Map;
   7
   8 import eu.svjatoslav.commons.network.Locale;
   9 import eu.svjatoslav.commons.string.WildCardMatcher;
  10
  11 public class NavigationItem {
  12
  13         private String matchingPattern;
  14         private final Map<Locale, String> localeToTitle = new HashMap<Locale, String>();
  15         ArrayList<NavigationItem> subElements = new ArrayList<NavigationItem>();
  16         private Locale[] localeOrder;
  17         private NavigationItem parent;
  18         private final String linkUrl;
  19
  20         public NavigationItem(final Locale... localeOrder) {
  21                 if (localeOrder.length == 0)
  22                         this.localeOrder = new Locale[] { Locale.ENG };
  23                 else
  24                         this.localeOrder = localeOrder;
  25
  26                 matchingPattern = null;
  27                 linkUrl = null;
  28         }
  29
  30         public NavigationItem(final NavigationItem parent, final String linkUrl,
  31                         final String... titles) {
  32                 this.parent = parent;
  33                 this.linkUrl = linkUrl;
  34                 matchingPattern = linkUrl;
  35
  36                 initializeLocalizedTitles(titles);
  37         }
  38
  39         public NavigationItem addChild(final String linkUrl, final String... titles) {
  40
  41                 final NavigationItem item = new NavigationItem(this, linkUrl, titles);
  42                 subElements.add(item);
  43
  44                 return item;
  45         }
  46
  47         public String getLinkUrl() {
  48                 return linkUrl;
  49         }
  50
  51         public Locale[] getLocaleOrder() {
  52                 if (localeOrder != null)
  53                         return localeOrder;
  54
  55                 return parent.getLocaleOrder();
  56         }
  57
  58         NavigationItem getMatchingNavigationItem(final String requestPath) {
  59                 if (matchesUrl(requestPath))
  60                         return this;
  61
  62                 for (final NavigationItem childNavigationItem : subElements) {
  63                         final NavigationItem match = childNavigationItem
  64                                         .getMatchingNavigationItem(requestPath);
  65
  66                         if (match != null)
  67                                 return match;
  68                 }
  69                 return null;
  70         }
  71
  72         public List<NavigationItem> getSubElements() {
  73                 return subElements;
  74         }
  75
  76         public String getTitle() {
  77                 if (localeToTitle.size() != 1)
  78                         throw new RuntimeException("there shall be exactly one title");
  79
  80                 return localeToTitle.values().iterator().next();
  81         }
  82
  83         public String getTitle(final Locale locale) {
  84                 return localeToTitle.get(locale);
  85         }
  86
  87         private void initializeLocalizedTitles(final String... titles) {
  88                 final Locale[] locales = getLocaleOrder();
  89                 if (locales.length != titles.length)
  90                         throw new RuntimeException("There should be exactly "
  91                                         + locales.length + " title(s).");
  92
  93                 for (int i = 0; i < titles.length; i++)
  94                         localeToTitle.put(locales[i], titles[i]);
  95         }
  96
  97         public boolean matchesUrl(final String url) {
  98                 return WildCardMatcher.match(url, matchingPattern);
  99         }
 100
 101         public NavigationItem setPattern(final String pattern) {
 102                 matchingPattern = pattern;
 103                 return this;
 104         }
 105
 106 }