Add serialization functionality to classes.

--
MOS_MIGRATED_REVID=89152485

3 files changed, 6 insertions, 3 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/events/Location.java b/src/main/java/com/google/devtools/build/lib/events/Location.java
index 4cc0ae53f3..c16c244c5d 100644
--- a/src/main/java/com/google/devtools/build/lib/events/Location.java
+++ b/src/main/java/com/google/devtools/build/lib/events/Location.java
@@ -213,7 +213,7 @@ public abstract class Location implements Serializable {
    * A value class that describes the line and column of an offset in a file.
    */
   @Immutable
-  public static final class LineAndColumn {
+  public static final class LineAndColumn implements Serializable {
     private final int line;
     private final int column;
 
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/SkylarkFileDependency.java b/src/main/java/com/google/devtools/build/lib/skyframe/SkylarkFileDependency.java
index 02d2e910c7..cfc78a9ec4 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/SkylarkFileDependency.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/SkylarkFileDependency.java
@@ -17,11 +17,13 @@ package com.google.devtools.build.lib.skyframe;
 import com.google.common.collect.ImmutableList;
 import com.google.devtools.build.lib.syntax.Label;
 
+import java.io.Serializable;
+
 /**
  * A simple value class to store the direct Skylark file dependencies of a Skylark
  * extension file. It also contains a Label identifying the extension file.
  */
-class SkylarkFileDependency {
+class SkylarkFileDependency implements Serializable {
 
   private final Label label;
   private final ImmutableList<SkylarkFileDependency> dependencies;
diff --git a/src/main/java/com/google/devtools/build/lib/syntax/SkylarkEnvironment.java b/src/main/java/com/google/devtools/build/lib/syntax/SkylarkEnvironment.java
index f84c6ee664..bfb7336c8a 100644
--- a/src/main/java/com/google/devtools/build/lib/syntax/SkylarkEnvironment.java
+++ b/src/main/java/com/google/devtools/build/lib/syntax/SkylarkEnvironment.java
@@ -21,6 +21,7 @@ import com.google.devtools.build.lib.events.Event;
 import com.google.devtools.build.lib.events.EventHandler;
 import com.google.devtools.build.lib.util.Fingerprint;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
@@ -33,7 +34,7 @@ import javax.annotation.Nullable;
 /**
  * The environment for Skylark.
  */
-public class SkylarkEnvironment extends Environment {
+public class SkylarkEnvironment extends Environment implements Serializable {
 
   /**
    * This set contains the variable names of all the successful lookups from the global