I try to parse a date, e.g. “2022-02-02” as java.time.LocalDate.
Why the values passed to the scalar class are wrapped into curly braces? And how do I fix this?
I configured the scalar for java.time.LocalDate:
@Component
public class DateScalar extends GraphQLScalarType {
public DateScalar() {
super("Date", "java.time.LocalDate", new Coercing() {
@Override
public Object serialize(Object o) throws CoercingSerializeException {
return DateTimeFormatter.ofPattern("yyyy-MM-dd").format((LocalDate) o);
}
@Override
public Object parseValue(Object o) throws CoercingParseValueException {
return LocalDate.parse(o.toString());
}
@Override
public Object parseLiteral(Object o) throws CoercingParseLiteralException {
if (o == null) {
return null;
}
return parseValue(o.toString());
}
});
}
}
This is the query:
mutation {
createEvent(createEventRequest: {
name: "test",
description: "test description",
userId: 1,
participants: [{
firstName: "first",
lastName: "last"
}],
location: {
street: "street",
streetNumber: "streetNumber",
country: "country"
},
duration: {
entireDay: false,
recurringDate: false,
start: "2018-09-03"
}
}) {
id
name
description
participantResponses {
id
firstName
lastName
}
locationResponse {
id
street
streetNumber
country
}
durationResponse {
id
start
end
entireDay
recurringDate
}
userResponse {
id
firstName
lastName
email
}
}
}
The error says that Text ‘StringValue{value=’2018-09-03′}’ could not be parsed at index 0. I do not really understand why this is still wrapped into curly brackets.
java.time.format.DateTimeParseException: Text ‘StringValue{value=’2018-09-03′}’ could not be parsed at index 0 at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2052) ~[na:na] at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1954) ~[na:na] at java.base/java.time.LocalDate.parse(LocalDate.java:430) ~[na:na] at java.base/java.time.LocalDate.parse(LocalDate.java:415) ~[na:na] at com.projects.calendar.scalar.DateScalar$1.parseValue(DateScalar.java:21) ~[classes/:na] at com.projects.calendar.scalar.DateScalar$1.parseLiteral(DateScalar.java:29) ~[classes/:na] at graphql.validation.ValidationUtil.parseLiteral(ValidationUtil.java:113) ~[graphql-java-9.2.jar:na] at graphql.validation.ValidationUtil.isValidLiteralValue(ValidationUtil.java:90) ~[graphql-java-9.2.jar:na] at graphql.validation.ValidationUtil.isValidLiteralValue(ValidationUtil.java:141) ~[graphql-java-9.2.jar:na] at graphql.validation.ValidationUtil.isValidLiteralValue(ValidationUtil.java:107) ~[graphql-java-9.2.jar:na] at graphql.validation.ValidationUtil.isValidLiteralValue(ValidationUtil.java:141) ~[graphql-java-9.2.jar:na] at graphql.validation.ValidationUtil.isValidLiteralValue(ValidationUtil.java:107) ~[graphql-java-9.2.jar:na] at graphql.validation.rules.ArgumentsOfCorrectType.checkArgument(ArgumentsOfCorrectType.java:23) ~[graphql-java-9.2.jar:na] at graphql.validation.RulesVisitor.checkArgument(RulesVisitor.java:98) ~[graphql-java-9.2.jar:na] at graphql.validation.RulesVisitor.enter(RulesVisitor.java:65) ~[graphql-java-9.2.jar:na] at graphql.validation.LanguageTraversal.traverseImpl(LanguageTraversal.java:33) ~[graphql-java-9.2.jar:na] at graphql.validation.LanguageTraversal.traverseImpl(LanguageTraversal.java:38) ~[graphql-java-9.2.jar:na] at graphql.validation.LanguageTraversal.traverseImpl(LanguageTraversal.java:38) ~[graphql-java-9.2.jar:na] at graphql.validation.LanguageTraversal.traverseImpl(LanguageTraversal.java:38) ~[graphql-java-9.2.jar:na] at graphql.validation.LanguageTraversal.traverseImpl(LanguageTraversal.java:38) ~[graphql-java-9.2.jar:na] at graphql.validation.LanguageTraversal.traverse(LanguageTraversal.java:28) ~[graphql-java-9.2.jar:na] at graphql.validation.Validator.validateDocument(Validator.java:42) ~[graphql-java-9.2.jar:na] at graphql.GraphQL.validate(GraphQL.java:539) ~[graphql-java-9.2.jar:na] at graphql.GraphQL.parseAndValidate(GraphQL.java:509) ~[graphql-java-9.2.jar:na] at graphql.GraphQL.lambda$parseValidateAndExecute$3(GraphQL.java:490) ~[graphql-java-9.2.jar:na] at graphql.execution.preparsed.NoOpPreparsedDocumentProvider.get(NoOpPreparsedDocumentProvider.java:11) ~[graphql-java-9.2.jar:na] at graphql.GraphQL.parseValidateAndExecute(GraphQL.java:486) ~[graphql-java-9.2.jar:na] at graphql.GraphQL.executeAsync(GraphQL.java:470) ~[graphql-java-9.2.jar:na] at graphql.GraphQL.execute(GraphQL.java:401) ~[graphql-java-9.2.jar:na] at graphql.servlet.GraphQLQueryInvoker.query(GraphQLQueryInvoker.java:92) ~[graphql-java-servlet-6.1.2.jar:na] at graphql.servlet.GraphQLQueryInvoker.query(GraphQLQueryInvoker.java:88) ~[graphql-java-servlet-6.1.2.jar:na] at graphql.servlet.GraphQLQueryInvoker.query(GraphQLQueryInvoker.java:39) ~[graphql-java-servlet-6.1.2.jar:na] at graphql.servlet.AbstractGraphQLHttpServlet.query(AbstractGraphQLHttpServlet.java:265) ~[graphql-java-servlet-6.1.2.jar:na] at graphql.servlet.AbstractGraphQLHttpServlet.lambda$new$2(AbstractGraphQLHttpServlet.java:183) ~[graphql-java-servlet-6.1.2.jar:na] at graphql.servlet.AbstractGraphQLHttpServlet.doRequest(AbstractGraphQLHttpServlet.java:236) ~[graphql-java-servlet-6.1.2.jar:na] at graphql.servlet.AbstractGraphQLHttpServlet.doRequestAsync(AbstractGraphQLHttpServlet.java:227) ~[graphql-java-servlet-6.1.2.jar:na] at graphql.servlet.AbstractGraphQLHttpServlet.doPost(AbstractGraphQLHttpServlet.java:257) ~[graphql-java-servlet-6.1.2.jar:na] at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[tomcat-embed-core-9.0.56.jar:4.0.FR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.56.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.56.jar:9.0.56] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:91) ~[spring-web-5.3.15.jar:5.3.15] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.15.jar:5.3.15] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.15.jar:5.3.15] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.15.jar:5.3.15] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.15.jar:5.3.15] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.15.jar:5.3.15] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.15.jar:5.3.15] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.15.jar:5.3.15] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1732) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.56.jar:9.0.56] at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]
This is the graphqls file if needed:
type Query {
user(id : Int) : UserResponse,
userByEmail(email : String) : [UserResponse]
}
type Mutation {
createUser(createUserRequest: CreateUserRequest) : UserResponse
createEvent(createEventRequest: CreateEventRequest) : EventResponse
}
input CreateEventRequest {
name: String,
description: String,
participants: [Participant],
location: Location,
duration: Duration,
userId: Int
}
input Duration {
start:Date,
end:Date,
entireDay:Boolean ,
recurringDate:Boolean
}
input Location {
street:String ,
streetNumber:String,
country:String
}
input Participant {
firstName: String,
lastName: String
}
type UserResponse {
id: Int,
firstName: String,
lastName: String,
email: String
}
type EventResponse {
id: Int,
name: String,
description: String,
participantResponses: [ParticipantResponse],
locationResponse: LocationResponse,
durationResponse: DurationResponse,
userResponse: UserResponse
}
type DurationResponse {
id: Int
start: Date
end: Date
entireDay: Boolean
recurringDate: Boolean
}
type LocationResponse {
id: Int,
street: String ,
streetNumber: String ,
country: String
}
type ParticipantResponse {
id: Int,
firstName: String,
lastName: String
}
input CreateUserRequest {
firstName: String!,
lastName: String!,
email: String!
}
scalar Date
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Answer
The parseLiteral method parameter is actually a node of the abstract syntax tree produced from parsing the GraphQL query. The method implementation should extract the literal value from the node:
@Override
public LocalDate parseLiteral(Object o) throws CoercingParseLiteralException {
if (o instanceof StringValue) {
var value = ((StringValue) o).getValue();
try {
return LocalDate.parse(value);
} catch (DateTimeParseException e) {
throw new CoercingParseLiteralException("Cannot parse [" + value + "] to LocalDate", e);
}
} else {
throw new CoercingParseLiteralException(
"Expected literal of type StringValue but was " + o.getClass());
}
}