Add SelectableDataSource interface

app/src/main/java/net/pokeranalytics/android/ui/adapter/RowRepresentableDataSource.kt

@@ -8,7 +8,7 @@ import net.pokeranalytics.android.ui.view.RowRepresentableEditDescriptor
 /**
  * Base Interface to provide the RowRepresentable to the adapter
  */
-interface RowRepresentableDataSource: EditableDataSource, DisplayableDataSource {
+interface RowRepresentableDataSource: EditableDataSource, DisplayableDataSource, SelectableDataSource {
 
     /**
      * Returns a prebuild list of rows
@@ -157,4 +157,17 @@ interface EditableDataSource {
     fun editDescriptors(row: RowRepresentable): ArrayList<RowRepresentableEditDescriptor> {
         return ArrayList()
     }
+}
+
+
+/**
+ * An interface providing a way to select a row
+ */
+interface SelectableDataSource {
+    /**
+     * A boolean to indicate if the row is selected or not
+     */
+    fun isSelected(row: RowRepresentable): Boolean {
+        return false
+    }
 }