refactoring: StoredList

* try more encapsulation instead of ID comparisons all time

3 files changed, 42 insertions, 6 deletions

diff --git a/main/src/cgeo/geocaching/list/AbstractList.java b/main/src/cgeo/geocaching/list/AbstractList.java
index c75c6a1..ec783eb 100644
--- a/main/src/cgeo/geocaching/list/AbstractList.java
+++ b/main/src/cgeo/geocaching/list/AbstractList.java
@@ -1,15 +1,28 @@
 package cgeo.geocaching.list;
 
-abstract class AbstractList {
+import org.eclipse.jdt.annotation.Nullable;
+
+import android.util.SparseArray;
+
+public abstract class AbstractList {
 
     public final int id;
     public final String title;
+    private static SparseArray<AbstractList> LISTS = new SparseArray<AbstractList>();
 
     public AbstractList(final int id, final String title) {
         this.id = id;
         this.title = title;
+        LISTS.put(id, this);
     }
 
     public abstract String getTitleAndCount();
 
+    public abstract boolean isConcrete();
+
+    @Nullable
+    public static AbstractList getListById(int listId) {
+        return LISTS.get(listId);
+    }
+
 }
diff --git a/main/src/cgeo/geocaching/list/PseudoList.java b/main/src/cgeo/geocaching/list/PseudoList.java
index c93f011..365d6fd 100644
--- a/main/src/cgeo/geocaching/list/PseudoList.java
+++ b/main/src/cgeo/geocaching/list/PseudoList.java
@@ -5,10 +5,22 @@ import cgeo.geocaching.R;
 
 public class PseudoList extends AbstractList {
 
-    public static final int ALL_LIST_ID = 2;
+    private static final int ALL_LIST_ID = 2;
+    /**
+     * list entry to show all caches
+     */
     public static final PseudoList ALL_LIST = new PseudoList(ALL_LIST_ID, R.string.list_all_lists);
 
-    public PseudoList(int id, final int titleResourceId) {
+    private static final int NEW_LIST_ID = 3;
+    /**
+     * list entry to create a new list
+     */
+    public static final AbstractList NEW_LIST = new PseudoList(NEW_LIST_ID, R.string.list_menu_create);
+
+    /**
+     * private constructor to have all instances as constants in the class
+     */
+    private PseudoList(int id, final int titleResourceId) {
         super(id, CgeoApplication.getInstance().getResources().getString(titleResourceId));
     }
 
@@ -17,4 +29,9 @@ public class PseudoList extends AbstractList {
         return "<" + title + ">";
     }
 
+    @Override
+    public boolean isConcrete() {
+        return false;
+    }
+
 }
diff --git a/main/src/cgeo/geocaching/list/StoredList.java b/main/src/cgeo/geocaching/list/StoredList.java
index f1632c4..feb40c7 100644
--- a/main/src/cgeo/geocaching/list/StoredList.java
+++ b/main/src/cgeo/geocaching/list/StoredList.java
@@ -89,12 +89,12 @@ public final class StoredList extends AbstractList {
             if (!onlyConcreteLists) {
                 lists.add(PseudoList.ALL_LIST);
             }
+            lists.add(PseudoList.NEW_LIST);
 
             final List<CharSequence> listsTitle = new ArrayList<CharSequence>();
             for (AbstractList list : lists) {
                 listsTitle.add(list.getTitleAndCount());
             }
-            listsTitle.add("<" + res.getString(R.string.list_menu_create) + ">");
 
             final CharSequence[] items = new CharSequence[listsTitle.size()];
 
@@ -103,7 +103,8 @@ public final class StoredList extends AbstractList {
             builder.setItems(listsTitle.toArray(items), new DialogInterface.OnClickListener() {
                 @Override
                 public void onClick(DialogInterface dialogInterface, int itemId) {
-                    if (itemId >= lists.size()) {
+                    final AbstractList list = lists.get(itemId);
+                    if (list == PseudoList.NEW_LIST) {
                         // create new list on the fly
                         promptForListCreation(runAfterwards, newListName);
                     }
@@ -208,10 +209,15 @@ public final class StoredList extends AbstractList {
      * Return the given list, if it is a concrete list. Return the default list otherwise.
      */
     public static int getConcreteList(int listId) {
-        if (listId == PseudoList.ALL_LIST_ID || listId == TEMPORARY_LIST_ID) {
+        if (listId == PseudoList.ALL_LIST.id || listId == TEMPORARY_LIST_ID) {
             return STANDARD_LIST_ID;
         }
         return listId;
     }
 
+    @Override
+    public boolean isConcrete() {
+        return true;
+    }
+
 }