Room database class plus a couple of DAO classes

[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / dao / CurrencyDAO.java

diff --git a/app/src/main/java/net/ktnx/mobileledger/dao/CurrencyDAO.java b/app/src/main/java/net/ktnx/mobileledger/dao/CurrencyDAO.java
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+++ b/app/src/main/java/net/ktnx/mobileledger/dao/CurrencyDAO.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright © 2021 Damyan Ivanov.
+ * This file is part of MoLe.
+ * MoLe is free software: you can distribute it and/or modify it
+ * under the term of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your opinion), any later version.
+ *
+ * MoLe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License terms for details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.ktnx.mobileledger.dao;
+
+import androidx.lifecycle.LiveData;
+import androidx.room.Dao;
+import androidx.room.Delete;
+import androidx.room.Insert;
+import androidx.room.Query;
+import androidx.room.Update;
+
+import net.ktnx.mobileledger.db.Currency;
+
+import java.util.List;
+
+@Dao
+public interface CurrencyDAO {
+    @Insert
+    void insert(Currency... items);
+
+    @Update
+    void update(Currency... items);
+
+    @Delete
+    void delete(Currency item);
+
+    @Query("SELECT * FROM currencies")
+    LiveData<List<Currency>> getCurrencies();
+
+    @Query("SELECT * FROM currencies WHERE id = :id")
+    LiveData<Currency> getCurrencyById(Long id);
+
+//    not useful for now
+//    @Transaction
+//    @Query("SELECT * FROM patterns")
+//    List<PatternWithAccounts> getPatternsWithAccounts();
+}