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[validation] Warn on duplicate tags #6061

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Apr 29, 2020
Merged

[validation] Warn on duplicate tags #6061

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26 changes: 23 additions & 3 deletions ...pi-generator/src/main/java/org/openapitools/codegen/validations/oas/OpenApiEvaluator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -6,12 +6,11 @@
import io.swagger.v3.oas.models.media.Schema;
import io.swagger.v3.oas.models.parameters.Parameter;
import io.swagger.v3.oas.models.security.SecurityScheme;
import io.swagger.v3.oas.models.tags.Tag;
import org.openapitools.codegen.utils.ModelUtils;
import org.openapitools.codegen.validation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.*;

/**
* A validator which evaluates an OpenAPI 3.x specification document
Expand Down Expand Up @@ -101,6 +100,27 @@ public ValidationResult validate(OpenAPI specification) {
validationResult.consume(parameterValidations.validate(wrapper));
});

List<Tag> tags = specification.getTags();
if (tags != null && tags.size() > 1) {
Set<String> distinct = new HashSet<>();
Set<String> duplicated = new HashSet<>();
tags.forEach(tag -> {
// add returns false if it already exists…
if (!distinct.add(tag.getName())) {
duplicated.add(tag.getName());
}
});
if (duplicated.size() > 0) {
// From https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#fixed-fields
// A list of tags used by the specification with additional metadata. The order of the tags can be used
// to reflect on their order by the parsing tools. Not all tags that are used by the Operation Object
// must be declared. The tags that are not declared MAY be organized randomly or based on the tools'
// logic. Each tag name in the list MUST be unique.
ValidationRule rule = ValidationRule.warn("Duplicate tags", "The specification requires that tag names are unique.", s -> ValidationRule.Fail.empty());
validationResult.addResult(Validated.invalid(rule, "Duplicated tag(s): " + String.join(",", duplicated)));
}
}

return validationResult;
}
}