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GraphQL.java
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package graphql;
import graphql.execution.Execution;
import graphql.execution.ExecutionStrategy;
import graphql.language.Document;
import graphql.language.SourceLocation;
import graphql.parser.Parser;
import graphql.schema.GraphQLSchema;
import graphql.validation.ValidationError;
import graphql.validation.Validator;
import org.antlr.v4.runtime.RecognitionException;
import org.antlr.v4.runtime.misc.ParseCancellationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import static graphql.Assert.assertNotNull;
public class GraphQL {
private final GraphQLSchema graphQLSchema;
private final ExecutionStrategy executionStrategy;
private static final Logger log = LoggerFactory.getLogger(GraphQL.class);
public GraphQL(GraphQLSchema graphQLSchema) {
this(graphQLSchema, null);
}
public GraphQL(GraphQLSchema graphQLSchema, ExecutionStrategy executionStrategy) {
this.graphQLSchema = graphQLSchema;
this.executionStrategy = executionStrategy;
}
public ExecutionResult execute(String requestString) {
return execute(requestString, null);
}
public ExecutionResult execute(String requestString, Object context) {
return execute(requestString, context, Collections.<String, Object>emptyMap());
}
public ExecutionResult execute(String requestString, String operationName, Object context) {
return execute(requestString, operationName, context, Collections.<String, Object>emptyMap());
}
public ExecutionResult execute(String requestString, Object context, Map<String, Object> arguments) {
return execute(requestString, null, context, arguments);
}
public ExecutionResult execute(String requestString, String operationName, Object context, Map<String, Object> arguments) {
assertNotNull(arguments, "arguments can't be null");
log.debug("Executing request. operation name: {}. Request: {} ", operationName, requestString);
Parser parser = new Parser();
Document document;
try {
document = parser.parseDocument(requestString);
} catch (ParseCancellationException e) {
RecognitionException recognitionException = (RecognitionException) e.getCause();
SourceLocation sourceLocation = new SourceLocation(recognitionException.getOffendingToken().getLine(), recognitionException.getOffendingToken().getCharPositionInLine());
InvalidSyntaxError invalidSyntaxError = new InvalidSyntaxError(sourceLocation);
return new ExecutionResultImpl(Arrays.asList(invalidSyntaxError));
}
Validator validator = new Validator();
List<ValidationError> validationErrors = validator.validateDocument(graphQLSchema, document);
if (validationErrors.size() > 0) {
return new ExecutionResultImpl(validationErrors);
}
Execution execution = new Execution(executionStrategy);
return execution.execute(graphQLSchema, context, document, operationName, arguments);
}
}