1 files changed, 82 insertions, 0 deletions
diff --git a/mobile/android/services/src/main/java/org/mozilla/gecko/background/common/EditorBranch.java b/mobile/android/services/src/main/java/org/mozilla/gecko/background/common/EditorBranch.java
new file mode 100644
index 000000000..1ead09afa
--- /dev/null
+++ b/mobile/android/services/src/main/java/org/mozilla/gecko/background/common/EditorBranch.java
@@ -0,0 +1,82 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.background.common;
+
+import java.util.Set;
+
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+
+public class EditorBranch implements Editor {
+
+  private final String prefix;
+  private Editor editor;
+
+  public EditorBranch(final SharedPreferences prefs, final String prefix) {
+    if (!prefix.endsWith(".")) {
+      throw new IllegalArgumentException("No trailing period in prefix.");
+    }
+    this.prefix = prefix;
+    this.editor = prefs.edit();
+  }
+
+  @Override
+  public void apply() {
+    this.editor.apply();
+  }
+
+  @Override
+  public Editor clear() {
+    this.editor = this.editor.clear();
+    return this;
+  }
+
+  @Override
+  public boolean commit() {
+    return this.editor.commit();
+  }
+
+  @Override
+  public Editor putBoolean(String key, boolean value) {
+    this.editor = this.editor.putBoolean(prefix + key, value);
+    return this;
+  }
+
+  @Override
+  public Editor putFloat(String key, float value) {
+    this.editor = this.editor.putFloat(prefix + key, value);
+    return this;
+  }
+
+  @Override
+  public Editor putInt(String key, int value) {
+    this.editor = this.editor.putInt(prefix + key, value);
+    return this;
+  }
+
+  @Override
+  public Editor putLong(String key, long value) {
+    this.editor = this.editor.putLong(prefix + key, value);
+    return this;
+  }
+
+  @Override
+  public Editor putString(String key, String value) {
+    this.editor = this.editor.putString(prefix + key, value);
+    return this;
+  }
+
+  // Not marking as Override, because Android <= 10 doesn't have
+  // putStringSet. Neither can we implement it.
+  public Editor putStringSet(String key, Set<String> value) {
+    throw new RuntimeException("putStringSet not available.");
+  }
+
+  @Override
+  public Editor remove(String key) {
+    this.editor = this.editor.remove(prefix + key);
+    return this;
+  }
+}
+\ No newline at end of file