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/*
* ============LICENSE_START=======================================================
* PROJECT
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* Copyright (C) 2019 Nokia. All rights reserved.s
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.restapi;
import static java.util.stream.StreamSupport.stream;
import com.github.fge.jackson.JsonLoader;
import com.github.fge.jsonschema.core.report.ProcessingReport;
import com.github.fge.jsonschema.main.JsonSchema;
import java.util.Optional;
import org.json.JSONObject;
import org.onap.dcae.ApplicationException;
import org.onap.dcae.ApplicationSettings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.ResponseEntity;
public class EventValidator {
private static final Logger log = LoggerFactory.getLogger(EventValidator.class);
private ApplicationSettings applicationSettings;
public EventValidator(ApplicationSettings applicationSettings) {
this.applicationSettings = applicationSettings;
}
public Optional<ResponseEntity<String>> validate(JSONObject jsonObject, String type, String version){
if (applicationSettings.jsonSchemaValidationEnabled()) {
if (jsonObject.has(type)) {
if (!conformsToSchema(jsonObject, version)) {
return errorResponse(ApiException.SCHEMA_VALIDATION_FAILED);
}
} else {
return errorResponse(ApiException.INVALID_JSON_INPUT);
}
}
return Optional.empty();
}
private boolean conformsToSchema(JSONObject payload, String version) {
try {
JsonSchema schema = applicationSettings.jsonSchema(version);
ProcessingReport report = schema.validate(JsonLoader.fromString(payload.toString()));
if (report.isSuccess()) {
return true;
}
log.warn("Schema validation failed for event: " + payload);
stream(report.spliterator(), false).forEach(e -> log.warn(e.getMessage()));
return false;
} catch (Exception e) {
throw new ApplicationException("Unable to validate against schema", e);
}
}
private Optional<ResponseEntity<String>> errorResponse(ApiException noServerResources) {
return Optional.of(ResponseEntity.status(noServerResources.httpStatusCode)
.body(noServerResources.toJSON().toString()));
}
}
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