add content provider for categories

mpao · May 31, 2018 · f9c7e93 · f9c7e93
1 parent 42d791e
commit f9c7e93
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Showing 2 changed files with 23 additions and 6 deletions.
diff --git a/...c/main/java/io/github/mpao/florencearchitectures/models/databases/AppContentProvider.java b/...c/main/java/io/github/mpao/florencearchitectures/models/databases/AppContentProvider.java
@@ -11,6 +11,7 @@
 import android.net.Uri;
 import android.support.annotation.NonNull;
 import io.github.mpao.florencearchitectures.R;
+import static io.github.mpao.florencearchitectures.models.databases.AppContract.AppContractElement.CATEGORY;
 import static io.github.mpao.florencearchitectures.models.databases.AppContract.AppContractElement.CONTENT_URI;
 import static io.github.mpao.florencearchitectures.models.databases.AppContract.AppContractElement.BUILDINGS_TABLE;
 
@@ -19,14 +20,16 @@ public class AppContentProvider extends ContentProvider {
     DbHelper dbHelper;
     Context context;
     // use always the conventional mode: 100,200... for directories, and 101,102... for items in that direcotry
-    public static final int BUILDINGS = 100;
-    public static final int ELEMENT   = 101;
+    public static final int BUILDINGS  = 100;
+    public static final int ELEMENT    = 101;
+    public static final int CATEGORIES = 200;
     public static final UriMatcher URI_MATCHER = buildUriMatcher();
     public static UriMatcher buildUriMatcher(){
 
         UriMatcher uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
-        uriMatcher.addURI(AppContract.AUTHORITY, AppContract.PATH, BUILDINGS);
-        uriMatcher.addURI(AppContract.AUTHORITY, AppContract.PATH + "/#", ELEMENT);
+        uriMatcher.addURI(AppContract.AUTHORITY, AppContract.ALL_BUILDINGS, BUILDINGS);
+        uriMatcher.addURI(AppContract.AUTHORITY, AppContract.CATEGORIES, CATEGORIES);
+        uriMatcher.addURI(AppContract.AUTHORITY, AppContract.ALL_BUILDINGS + "/#", ELEMENT);
         return uriMatcher;
 
     }
@@ -90,6 +93,18 @@ public Cursor query(@NonNull Uri uri, String[] projection, String selection, Str
                         null,
                         "id="+uri.getPathSegments().get(1),
                         sortOrder);
+                break;
+            case CATEGORIES:
+                cursor = db.query(
+                        BUILDINGS_TABLE,
+                        new String[] {CATEGORY,"count(*) AS count"},
+                        selection,
+                        selectionArgs,
+                        CATEGORY,
+                        null,
+                        CATEGORY
+                );
+                break;
             default:
                 throw new UnsupportedOperationException(context.getString(R.string.network_error));
         }

diff --git a/app/src/main/java/io/github/mpao/florencearchitectures/models/databases/AppContract.java b/app/src/main/java/io/github/mpao/florencearchitectures/models/databases/AppContract.java
@@ -9,7 +9,8 @@ public class AppContract {
      */
     public static final String AUTHORITY     = "io.github.mpao.florencearchitectures";
     public static final Uri BASE_CONTENT_URI = Uri.parse("content://" + AUTHORITY);
-    public static final String PATH          = "buildings";
+    public static final String ALL_BUILDINGS = "buildings";
+    public static final String CATEGORIES    = "categories";
 
     private AppContract(){}
 
@@ -20,7 +21,8 @@ public static class AppContractElement {
 
         // define the content uri for the table
         // for a single element, append che # to identify the building's ID
-        public static final Uri CONTENT_URI = BASE_CONTENT_URI.buildUpon().appendPath(PATH).build();
+        public static final Uri CONTENT_URI  = BASE_CONTENT_URI.buildUpon().appendPath(ALL_BUILDINGS).build();
+        public static final Uri CATEGORY_URI = BASE_CONTENT_URI.buildUpon().appendPath(CATEGORIES).build();
 
         public static final String BUILDINGS_TABLE = "buildings";
         public static final String ID              = "id";