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Add JSpecify nullability annotations to DataFetcherResult by dondonz · Pull Request #3891 · graphql-java/graphql-java · GitHub

/ graphql-java Public

Add JSpecify nullability annotations to DataFetcherResult #3891

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Merged
dondonz merged 1 commit into from
Apr 8, 2025
Conversation 3 Commits 1 Checks 0 Files changed
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Add JSpecify nullability annotations to DataFetcherResult #3891

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33 changes: 18 additions & 15 deletions src/main/java/graphql/execution/DataFetcherResult.java
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,8 @@
import graphql.Internal;
import graphql.PublicApi;
import graphql.schema.DataFetcher;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

import java.util.ArrayList;
import java.util.List;
Expand All @@ -32,14 +34,15 @@
* @param <T> The type of the data fetched
*/
@PublicApi
@NullMarked
public class DataFetcherResult<T> {

private final T data;
private final @Nullable T data;
private final List<GraphQLError> errors;
private final Object localContext;
private final Map<Object, Object> extensions;
private final @Nullable Object localContext;
private final @Nullable Map<Object, Object> extensions;

private DataFetcherResult(T data, List<GraphQLError> errors, Object localContext, Map<Object, Object> extensions) {
private DataFetcherResult(@Nullable T data, List<GraphQLError> errors, @Nullable Object localContext, @Nullable Map<Object, Object> extensions) {
this.data = data;
this.errors = ImmutableList.copyOf(assertNotNull(errors));
this.localContext = localContext;
Expand All @@ -49,7 +52,7 @@ private DataFetcherResult(T data, List<GraphQLError> errors, Object localContext
/**
* @return The data fetched. May be null.
*/
public T getData() {
public @Nullable T getData() {
return data;
}

Expand All @@ -72,7 +75,7 @@ public boolean hasErrors() {
*
* @return a local context object
*/
public Object getLocalContext() {
public @Nullable Object getLocalContext() {
return localContext;
}

Expand All @@ -88,7 +91,7 @@ public Object getLocalContext() {
* @see graphql.extensions.ExtensionsBuilder
* @see graphql.extensions.ExtensionsMerger
*/
public Map<Object, Object> getExtensions() {
public @Nullable Map<Object, Object> getExtensions() {
return extensions;
}

Expand All @@ -115,7 +118,7 @@ public DataFetcherResult<T> transform(Consumer<Builder<T>> builderConsumer) {
*
* @return a new instance with where the data value has been transformed
*/
public <R> DataFetcherResult<R> map(Function<T, R> transformation) {
public <R> DataFetcherResult<R> map(Function<@Nullable T, @Nullable R> transformation) {
return new Builder<>(transformation.apply(this.data))
.errors(this.errors)
.extensions(this.extensions)
Expand All @@ -135,10 +138,10 @@ public static <T> Builder<T> newResult() {
}

public static class Builder<T> {
private T data;
private Object localContext;
private @Nullable T data;
private @Nullable Object localContext;
private final List<GraphQLError> errors = new ArrayList<>();
private Map<Object, Object> extensions;
private @Nullable Map<Object, Object> extensions;

public Builder(DataFetcherResult<T> existing) {
data = existing.getData();
Expand All @@ -147,14 +150,14 @@ public Builder(DataFetcherResult<T> existing) {
extensions = existing.extensions;
}

public Builder(T data) {
public Builder(@Nullable T data) {
this.data = data;
}

public Builder() {
}

public Builder<T> data(T data) {
public Builder<T> data(@Nullable T data) {
this.data = data;
return this;
}
Expand All @@ -181,12 +184,12 @@ public boolean hasErrors() {
return !errors.isEmpty();
}

public Builder<T> localContext(Object localContext) {
public Builder<T> localContext(@Nullable Object localContext) {
this.localContext = localContext;
return this;
}

public Builder<T> extensions(Map<Object, Object> extensions) {
public Builder<T> extensions(@Nullable Map<Object, Object> extensions) {
this.extensions = extensions;
return this;
}
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