sPFFramework/src/main/java/it/polimi/spf/framework/security/PersonPermissionTable.java
public int entryExistsFor(String userUID) {
		String selection = RelationshipEntry.COLUMN_USER_UUID + " = ?";
		String[] selectionArgs = { userUID };
		String[] columns = { RelationshipEntry.COLUMN_REQUEST_STATUS };
		SQLiteDatabase db = getReadableDatabase();
		Cursor cursor = db.query(RelationshipEntry.TABLE_PERSON_AUTH, columns, selection, selectionArgs, /* groupBy */null, /* having */null, /* orderBy */
				null);
		if (cursor.moveToNext()) {
			return cursor.getInt(cursor.getColumnIndex(RelationshipEntry.COLUMN_REQUEST_STATUS));
		}
		cursor.close();
		return REQUEST_NOT_EXIST;
	}
public int entryExistsFor(String userUID) {
		String selection = RelationshipEntry.COLUMN_USER_UUID + " = ?";
		String[] selectionArgs = { userUID };
		String[] columns = { RelationshipEntry.COLUMN_REQUEST_STATUS };
		SQLiteDatabase db = getReadableDatabase();
		Cursor cursor = db.query(RelationshipEntry.TABLE_PERSON_AUTH, columns, selection, selectionArgs, /* groupBy */null, /* having */null, /* orderBy */
				null);
		if (cursor.moveToNext()) {
			return cursor.getInt(cursor.getColumnIndex(RelationshipEntry.COLUMN_REQUEST_STATUS));
		}
		cursor.close();
		return REQUEST_NOT_EXIST;
	}
check if an entry for the specified user id exists. Returns the entry
state.

@param userUID
@return