Fold atomix-utils into atomix-storage

[controller.git] / third-party / atomix / storage / src / main / java / io / atomix / utils / serializer / serializers / ImmutableMapSerializer.java

diff --git a/third-party/atomix/storage/src/main/java/io/atomix/utils/serializer/serializers/ImmutableMapSerializer.java b/third-party/atomix/storage/src/main/java/io/atomix/utils/serializer/serializers/ImmutableMapSerializer.java
new file mode 100644 (file)
index 0000000..f3b9ce5
--- /dev/null
+++ b/third-party/atomix/storage/src/main/java/io/atomix/utils/serializer/serializers/ImmutableMapSerializer.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2014-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.atomix.utils.serializer.serializers;
+
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.Serializer;
+import com.esotericsoftware.kryo.io.Input;
+import com.esotericsoftware.kryo.io.Output;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMap.Builder;
+
+import java.util.Map.Entry;
+
+/**
+ * Kryo Serializer for {@link ImmutableMap}.
+ */
+public class ImmutableMapSerializer extends Serializer<ImmutableMap<?, ?>> {
+
+  /**
+   * Creates {@link ImmutableMap} serializer instance.
+   */
+  public ImmutableMapSerializer() {
+    // non-null, immutable
+    super(false, true);
+  }
+
+  @Override
+  public void write(Kryo kryo, Output output, ImmutableMap<?, ?> object) {
+    output.writeInt(object.size());
+    for (Entry<?, ?> e : object.entrySet()) {
+      kryo.writeClassAndObject(output, e.getKey());
+      kryo.writeClassAndObject(output, e.getValue());
+    }
+  }
+
+  @Override
+  public ImmutableMap<?, ?> read(Kryo kryo, Input input,
+      Class<ImmutableMap<?, ?>> type) {
+    final int size = input.readInt();
+    switch (size) {
+      case 0:
+        return ImmutableMap.of();
+      case 1:
+        return ImmutableMap.of(kryo.readClassAndObject(input),
+            kryo.readClassAndObject(input));
+
+      default:
+        Builder<Object, Object> builder = ImmutableMap.builder();
+        for (int i = 0; i < size; ++i) {
+          builder.put(kryo.readClassAndObject(input),
+              kryo.readClassAndObject(input));
+        }
+        return builder.build();
+    }
+  }
+}