Create an ImmutableTableCodec.

PiperOrigin-RevId: 200561008

1 files changed, 64 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/serialization/ImmutableTableCodec.java b/src/main/java/com/google/devtools/build/lib/skyframe/serialization/ImmutableTableCodec.java
new file mode 100644
index 0000000000..5207406089
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/serialization/ImmutableTableCodec.java
@@ -0,0 +1,64 @@
+// Copyright 2018 The Bazel Authors. All rights reserved.
+//
+// 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 com.google.devtools.build.lib.skyframe.serialization;
+
+import com.google.common.collect.ImmutableTable;
+import com.google.common.collect.Table.Cell;
+import com.google.protobuf.CodedInputStream;
+import com.google.protobuf.CodedOutputStream;
+import java.io.IOException;
+import java.util.Set;
+
+/** Codec for {@link ImmutableTable}. */
+public class ImmutableTableCodec<R, C, V> implements ObjectCodec<ImmutableTable<R, C, V>> {
+
+  @SuppressWarnings("unchecked")
+  @Override
+  public Class<ImmutableTable<R, C, V>> getEncodedClass() {
+    // Compiler doesn't like to do a direct cast.
+    return (Class<ImmutableTable<R, C, V>>) ((Class<?>) ImmutableTable.class);
+  }
+
+  @Override
+  public void serialize(
+      SerializationContext context, ImmutableTable<R, C, V> object, CodedOutputStream codedOut)
+      throws SerializationException, IOException {
+    Set<Cell<R, C, V>> cellSet = object.cellSet();
+    codedOut.writeInt32NoTag(cellSet.size());
+    for (Cell<R, C, V> cell : cellSet) {
+      context.serialize(cell.getRowKey(), codedOut);
+      context.serialize(cell.getColumnKey(), codedOut);
+      context.serialize(cell.getValue(), codedOut);
+    }
+  }
+
+  @Override
+  public ImmutableTable<R, C, V> deserialize(
+      DeserializationContext context, CodedInputStream codedIn)
+      throws SerializationException, IOException {
+    int length = codedIn.readInt32();
+    if (length < 0) {
+      throw new SerializationException("Expected non-negative length: " + length);
+    }
+    ImmutableTable.Builder<R, C, V> builder = ImmutableTable.builder();
+    for (int i = 0; i < length; i++) {
+      builder.put(
+          /*rowKey=*/ context.deserialize(codedIn),
+          /*columnKey=*/ context.deserialize(codedIn),
+          /*value=*/ context.deserialize(codedIn));
+    }
+    return builder.build();
+  }
+}