Memoize the hashCode of BindingDeclaration implementations

This has a pretty big win: at least 11% for a large internal component (5s/build), but looking at the profile diffbase, it looks like certain areas got even faster, and some areas that remain unchanged could have been slower in the profiles that were run. Either way, it's a big win for little cost.

RELNOTES=Build performance improvements for large components

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=231440006

java/dagger/internal/codegen/DelegateDeclaration.java

@@ -23,6 +23,7 @@
 import com.google.auto.common.MoreElements;
 import com.google.auto.common.MoreTypes;
 import com.google.auto.value.AutoValue;
+import com.google.auto.value.extension.memoized.Memoized;
 import com.google.common.base.Equivalence;
 import com.google.common.collect.Iterables;
 import dagger.Binds;
@@ -45,6 +46,13 @@ abstract class DelegateDeclaration extends BindingDeclaration implements HasCont
 
   abstract Optional<Equivalence.Wrapper<AnnotationMirror>> wrappedMapKey();
 
+  @Memoized
+  @Override
+  public abstract int hashCode();
+
+  @Override
+  public abstract boolean equals(Object obj);
+
   static final class Factory {
     private final DaggerTypes types;
     private final KeyFactory keyFactory;

java/dagger/internal/codegen/MembersInjectionBinding.java

@@ -85,6 +85,14 @@ boolean requiresModuleInstance() {
     return false;
   }
 
+  @Memoized
+  @Override
+  public abstract int hashCode();
+
+  // TODO(ronshapiro,dpb): simplify the equality semantics
+  @Override
+  public abstract boolean equals(Object obj);
+
   @AutoValue
   abstract static class InjectionSite {
     enum Kind {

java/dagger/internal/codegen/MultibindingDeclaration.java

@@ -21,6 +21,7 @@
 
 import com.google.auto.common.MoreTypes;
 import com.google.auto.value.AutoValue;
+import com.google.auto.value.extension.memoized.Memoized;
 import dagger.internal.codegen.ContributionType.HasContributionType;
 import dagger.model.Key;
 import dagger.multibindings.Multibinds;
@@ -56,6 +57,13 @@ abstract class MultibindingDeclaration extends BindingDeclaration implements Has
   @Override
   public abstract ContributionType contributionType();
 
+  @Memoized
+  @Override
+  public abstract int hashCode();
+
+  @Override
+  public abstract boolean equals(Object obj);
+
   /**
    * A factory for {@link MultibindingDeclaration}s.
    */

java/dagger/internal/codegen/OptionalBindingDeclaration.java

@@ -20,6 +20,7 @@
 import static com.google.common.base.Preconditions.checkArgument;
 
 import com.google.auto.value.AutoValue;
+import com.google.auto.value.extension.memoized.Memoized;
 import dagger.BindsOptionalOf;
 import dagger.model.Key;
 import java.util.Optional;
@@ -41,6 +42,13 @@ abstract class OptionalBindingDeclaration extends BindingDeclaration {
   @Override
   public abstract Key key();
 
+  @Memoized
+  @Override
+  public abstract int hashCode();
+
+  @Override
+  public abstract boolean equals(Object obj);
+
   static class Factory {
     private final KeyFactory keyFactory;
 

java/dagger/internal/codegen/ProductionBinding.java

@@ -113,6 +113,14 @@ static Builder builder() {
         .thrownTypes(ImmutableList.<TypeMirror>of());
   }
 
+  @Memoized
+  @Override
+  public abstract int hashCode();
+
+  // TODO(ronshapiro,dpb): simplify the equality semantics
+  @Override
+  public abstract boolean equals(Object obj);
+
   @AutoValue.Builder
   @CanIgnoreReturnValue
   abstract static class Builder extends ContributionBinding.Builder<ProductionBinding, Builder> {

java/dagger/internal/codegen/ProvisionBinding.java

@@ -105,6 +105,14 @@ boolean requiresModuleInstance() {
     return super.requiresModuleInstance();
   }
 
+  @Memoized
+  @Override
+  public abstract int hashCode();
+
+  // TODO(ronshapiro,dpb): simplify the equality semantics
+  @Override
+  public abstract boolean equals(Object obj);
+
   @AutoValue.Builder
   @CanIgnoreReturnValue
   abstract static class Builder extends ContributionBinding.Builder<ProvisionBinding, Builder> {

java/dagger/internal/codegen/SubcomponentDeclaration.java

@@ -20,6 +20,7 @@
 import static dagger.internal.codegen.ConfigurationAnnotations.getSubcomponentCreator;
 
 import com.google.auto.value.AutoValue;
+import com.google.auto.value.extension.memoized.Memoized;
 import com.google.common.collect.ImmutableSet;
 import dagger.model.Key;
 import java.util.Optional;
@@ -49,6 +50,13 @@ abstract class SubcomponentDeclaration extends BindingDeclaration {
   /** The module annotation. */
   abstract ModuleAnnotation moduleAnnotation();
 
+  @Memoized
+  @Override
+  public abstract int hashCode();
+
+  @Override
+  public abstract boolean equals(Object obj);
+
   static class Factory {
     private final KeyFactory keyFactory;