API-Design-Rules/examples/quarkus/src/main/java/org/acme/GreetingResource.java at 56ee465b5027926f97263e756aba4ecc3c88ff1b · Logius-standaarden/API-Design-Rules · GitHub

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package org.acme;

import jakarta.ws.rs.GET;
import jakarta.ws.rs.POST;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.core.MediaType;
import org.eclipse.microprofile.openapi.annotations.Operation;
import org.eclipse.microprofile.openapi.annotations.headers.Header;
import org.eclipse.microprofile.openapi.annotations.media.Content;
import org.eclipse.microprofile.openapi.annotations.media.Schema;
import org.eclipse.microprofile.openapi.annotations.responses.APIResponse;
import org.eclipse.microprofile.openapi.annotations.tags.Tag;
import org.jboss.resteasy.reactive.RestQuery;
import org.jboss.resteasy.reactive.Separator;

import java.util.List;
import java.util.Map;

@Path("/hello")
@Tag(name = "greeting")
public class GreetingResource {

    @GET
    @Operation(description = "Hello world endpoint")
    @APIResponse(
            responseCode = "200",
            content = @Content(mediaType = MediaType.TEXT_PLAIN),
            headers = {
                @Header(
                        name = OpenApiConstants.API_VERSION_HEADER_NAME,
                        schema = @Schema(implementation = String.class))
            })
    public String hello() {
        return "Hello from Quarkus REST";
    }

    @POST
    @Operation(description = "Test bad request with query parameter")
    @APIResponse(
            responseCode = "200",
            content = @Content(mediaType = MediaType.TEXT_PLAIN),
            headers = {
                @Header(
                        name = OpenApiConstants.API_VERSION_HEADER_NAME,
                        schema = @Schema(implementation = String.class))
            })
    @APIResponse(
            responseCode = "400",
            description = "Bad request response",
            content =
                    @Content(
                            mediaType = "application/problem+json",
                            schema = @Schema(implementation = BadRequestProblem.class)))
    public String withInput(@RestQuery("query") @Separator(",") List<String> queryParam) {
        if (queryParam.isEmpty()) {
            throw new BadRequestProblem(
                    "Missing required query parameter",
                    List.of(
                            BadRequestProblem.BadRequestDetails.forQuery(
                                    BadRequestProblem.BadRequestLocation.Query,
                                    "Query parameter is invalid",
                                    null)));
        }
        var queryParams = queryParam.iterator();
        for (var index = 0; queryParams.hasNext(); index++) {
            var param = queryParams.next();
            if (!param.equals("42")) {
                throw new BadRequestProblem(
                        "Missing required query parameter",
                        List.of(
                                BadRequestProblem.BadRequestDetails.forQuery(
                                        BadRequestProblem.BadRequestLocation.Query,
                                        "Query parameter is invalid",
                                        index)));
            }
        }
        return "Successful response";
    }
}