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GraphqL Java
There is a newer version: 230521-nf-execution
package graphql.execution;

import graphql.execution.instrumentation.Instrumentation;
import graphql.execution.instrumentation.InstrumentationState;
import graphql.language.Document;
import graphql.language.FragmentDefinition;
import graphql.language.NodeUtil;
import graphql.language.OperationDefinition;
import graphql.schema.GraphQLSchema;

import java.util.Map;

import static graphql.Assert.assertNotNull;

public class ExecutionContextBuilder {

    private ValuesResolver valuesResolver;
    private Instrumentation instrumentation;
    private ExecutionId executionId;
    private InstrumentationState instrumentationState;
    private GraphQLSchema graphQLSchema;
    private ExecutionStrategy queryStrategy;
    private ExecutionStrategy mutationStrategy;
    private ExecutionStrategy subscriptionStrategy;
    private Object context;
    private Object root;
    private Document document;
    private String operationName;
    private Map variables;

    public ExecutionContextBuilder valuesResolver(ValuesResolver valuesResolver) {
        this.valuesResolver = valuesResolver;
        return this;
    }

    public ExecutionContextBuilder instrumentation(Instrumentation instrumentation) {
        this.instrumentation = instrumentation;
        return this;
    }

    public ExecutionContextBuilder instrumentationState(InstrumentationState instrumentationState) {
        this.instrumentationState = instrumentationState;
        return this;
    }

    public ExecutionContextBuilder executionId(ExecutionId executionId) {
        this.executionId = executionId;
        return this;
    }

    public ExecutionContextBuilder graphQLSchema(GraphQLSchema graphQLSchema) {
        this.graphQLSchema = graphQLSchema;
        return this;
    }

    public ExecutionContextBuilder queryStrategy(ExecutionStrategy queryStrategy) {
        this.queryStrategy = queryStrategy;
        return this;
    }

    public ExecutionContextBuilder mutationStrategy(ExecutionStrategy mutationStrategy) {
        this.mutationStrategy = mutationStrategy;
        return this;
    }

    public ExecutionContextBuilder subscriptionStrategy(ExecutionStrategy subscriptionStrategy) {
        this.subscriptionStrategy = subscriptionStrategy;
        return this;
    }

    public ExecutionContextBuilder context(Object context) {
        this.context = context;
        return this;
    }

    public ExecutionContextBuilder root(Object root) {
        this.root = root;
        return this;
    }

    public ExecutionContextBuilder document(Document document) {
        this.document = document;
        return this;
    }

    public ExecutionContextBuilder operationName(String operationName) {
        this.operationName = operationName;
        return this;
    }

    public ExecutionContextBuilder variables(Map variables) {
        this.variables = variables;
        return this;
    }

    public ExecutionContext build() {
        // preconditions
        assertNotNull(executionId, "You must provide a query identifier");

        NodeUtil.GetOperationResult getOperationResult = NodeUtil.getOperation(document, operationName);
        Map fragmentsByName = getOperationResult.fragmentsByName;
        OperationDefinition operationDefinition = getOperationResult.operationDefinition;

        Map variableValues = valuesResolver.getVariableValues(graphQLSchema, operationDefinition.getVariableDefinitions(), variables);

        return new ExecutionContext(
                instrumentation,
                executionId,
                graphQLSchema,
                instrumentationState,
                queryStrategy,
                mutationStrategy,
                subscriptionStrategy,
                fragmentsByName,
                operationDefinition,
                variableValues,
                context,
                root);
    }
}