Add equality support to composing transitions.

RELNOTES: None.
PiperOrigin-RevId: 194540141

2 files changed, 24 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/config/transitions/ComposingPatchTransition.java b/src/main/java/com/google/devtools/build/lib/analysis/config/transitions/ComposingPatchTransition.java
index 6703b5c3a7..635cab4b47 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/config/transitions/ComposingPatchTransition.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/config/transitions/ComposingPatchTransition.java
@@ -57,5 +57,16 @@ public class ComposingPatchTransition implements PatchTransition {
   public String getName() {
     return delegate.getName();
   }
+
+  @Override
+  public int hashCode() {
+    return delegate.hashCode();
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    return other instanceof ComposingPatchTransition
+        && ((ComposingPatchTransition) other).delegate.equals(this.delegate);
+  }
 }
 
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/config/transitions/ComposingSplitTransition.java b/src/main/java/com/google/devtools/build/lib/analysis/config/transitions/ComposingSplitTransition.java
index 73fa1cf4e5..70c3bf8e70 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/config/transitions/ComposingSplitTransition.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/config/transitions/ComposingSplitTransition.java
@@ -19,6 +19,7 @@ import com.google.common.collect.ImmutableList;
 import com.google.devtools.build.lib.analysis.config.BuildOptions;
 import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
 import java.util.List;
+import java.util.Objects;
 
 /**
  * A configuration transition that composes two other transitions in an ordered sequence.
@@ -81,6 +82,18 @@ public class ComposingSplitTransition implements SplitTransition {
     return transition;
   }
 
+  @Override
+  public int hashCode() {
+    return Objects.hash(transition1, transition2);
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    return other instanceof ComposingSplitTransition
+        && ((ComposingSplitTransition) other).transition1.equals(this.transition1)
+        && ((ComposingSplitTransition) other).transition2.equals(this.transition2);
+  }
+
   /**
    * Returns whether this transition contains only patches (and is thus suitable as a delegate
    * for {@link ComposingPatchTransition}).