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/*
* ============LICENSE_START=======================================================
* DCAEGEN2-SERVICES-SDK
* ================================================================================
* Copyright (C) 2020 Nokia. All rights reserved.
* ================================================================================
* 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.dcaegen2.services.sdk.services.external.schema.manager.service;
import com.fasterxml.jackson.databind.JsonNode;
import org.onap.dcaegen2.services.sdk.services.external.schema.manager.exception.NoLocalReferenceException;
import org.onap.dcaegen2.services.sdk.services.external.schema.manager.model.SchemaReference;
import org.onap.dcaegen2.services.sdk.services.external.schema.manager.exception.IncorrectInternalFileReferenceException;
import org.openapi4j.core.exception.ResolutionException;
import org.openapi4j.schema.validator.v3.SchemaValidator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
class ValidatorCache {
private static final Logger logger = LoggerFactory.getLogger(ValidatorCache.class);
private final SchemaReferenceMapper schemaReferenceMapper;
private final Map<String, SchemaValidator> cache;
ValidatorCache(SchemaReferenceMapper schemaReferenceMapper) {
this.schemaReferenceMapper = schemaReferenceMapper;
this.cache = new HashMap<>();
}
SchemaReferenceMapper getSchemaReferenceMapper() {
return schemaReferenceMapper;
}
synchronized SchemaValidator resolveValidator(JsonNode event, String schemaRefPath) throws IOException, IncorrectInternalFileReferenceException, NoLocalReferenceException {
SchemaReference schemaReference = resolveSchemaReference(event, schemaRefPath);
schemaReference = schemaReferenceMapper.mapToLocalSchema(schemaReference);
SchemaValidator validator = cache.get(schemaReference.getUrl());
if (!isValidatorCached(validator)) {
validator = createNewValidator(schemaReference);
}
return validator;
}
private SchemaReference resolveSchemaReference(JsonNode event, String schemaRefPath) {
String publicSchemaReference = JsonFragmentRetriever.getFragment(event, schemaRefPath).asText();
SchemaReferenceResolver schemaReferenceResolver = new SchemaReferenceResolver(publicSchemaReference);
return new SchemaReference(schemaReferenceResolver);
}
private boolean isValidatorCached(SchemaValidator validator) {
return validator != null;
}
private SchemaValidator createNewValidator(SchemaReference schemaReference) throws IOException, IncorrectInternalFileReferenceException {
logger.info("Creating new stndDefined schema validator");
JsonNode schemaRefNode = SchemaReferenceJsonGenerator.getSchemaReferenceJson(schemaReference);
SchemaValidator schemaValidator = handleValidatorCreation(schemaRefNode);
cacheSchemaValidator(schemaReference.getFullSchemaReference(), schemaValidator);
return schemaValidator;
}
private SchemaValidator handleValidatorCreation(JsonNode schemaNode) throws IncorrectInternalFileReferenceException{
try {
return new SchemaValidator("StndDefinedSchemaValidator", schemaNode);
} catch (ResolutionException e) {
throw new IncorrectInternalFileReferenceException("Schema reference refer to existing file, " +
"but internal reference (after #) is incorrect. " + e.getMessage());
}
}
private void cacheSchemaValidator(String localSchemaReference, SchemaValidator schemaValidator) {
logger.info("Adding new stndDefined schema validator to cache");
cache.put(localSchemaReference, schemaValidator);
}
}
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