Inert MutableLiveData doesn't trigger changes when there are no changes

diff --git a/app/src/main/java/net/ktnx/mobileledger/model/InertMutableLiveData.java b/app/src/main/java/net/ktnx/mobileledger/model/InertMutableLiveData.java
new file mode 100644 (file)
index 0000000..b7048ab
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/model/InertMutableLiveData.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2020 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.model;
+
+import androidx.lifecycle.MutableLiveData;
+
+public class InertMutableLiveData<T> extends MutableLiveData<T> {
+    public InertMutableLiveData(T initialValue) {
+        super(initialValue);
+    }
+    public InertMutableLiveData() {
+        super();
+    }
+    @Override
+    public void setValue(T value) {
+        if (getValue() != value)
+            super.setValue(value);
+    }
+}