fix(auth): refine JSpecify nullability annotations for core ADC credentials - #14162
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August 21, 2026 20:32
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This pull request systematically adds @Nullable and @Override annotations across various Google credential classes and their builders to enhance null safety and code clarity. It also refactors some exception message formatting and simplifies a null check in IdentityPoolCredentials. Feedback on these changes highlights a double-space typo introduced in an exception message within ComputeEngineCredentials.java, which should be corrected to a single space for consistency.
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August 21, 2026 22:10
…ntials Refine JSpecify nullability annotations across core ADC credential types: - Annotate optional fields, getters, and builder setters/fields with @nullable across AccessToken, ComputeEngineCredentials, AppEngineCredentials, DefaultCredentialsProvider, ImpersonatedCredentials, GdchCredentials, CloudShellCredentials, DownscopedCredentials, IdTokenCredentials, and IdTokenProvider. - Annotate EnvironmentProvider and SystemEnvironmentProvider getEnv methods with @nullable. - Remove redundant final modifiers on private methods in DefaultCredentialsProvider. - Ensure correct JSpecify type-use annotation placements on fields, return types, and parameters. - Migrate Preconditions imports to com.google.common.base.Preconditions. - Ensure builder copy constructors properly preserve all fields and chain super(credentials).
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…nt credentials (#14164) Stacked on #14162. Refines JSpecify nullability annotations across ExternalAccountCredentials and subclasses: - **Type-Use Placement & Nullability**: Annotate optional fields, getters, and builder setters/fields with `@Nullable` across: - `ExternalAccountCredentials` - `IdentityPoolCredentials` - `AwsCredentials` - `PluggableAuthCredentials` - `ExternalAccountAuthorizedUserCredentials` - **Preconditions**: Standardize on `com.google.common.base.Preconditions` over `com.google.api.client.util.Preconditions`. - **Builder Copy Constructors**: Ensure builder copy constructors properly preserve all fields.
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Refines JSpecify nullability annotations across core ADC credential classes: