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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.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
public class UrlMapperFactory {
private static final Logger logger = LoggerFactory.getLogger(UrlMapperFactory.class);
UrlMapper getUrlMapper(String mappingFilePath, String schemasPath) {
Map<String, String> mappings = new HashMap<>();
try {
mappings = readMappingFile(mappingFilePath, schemasPath);
} catch (IOException ex) {
logger.warn("Unable to read mapping file. Mapping file path: {}", mappingFilePath);
} catch (NullPointerException ex) {
mappings = Collections.emptyMap();
logger.warn("Schema mapping file has incorrect format. Mapping file path: {}", mappingFilePath);
}
return new UrlMapper(mappings);
}
private Map<String, String> readMappingFile(String mappingFilePath, String schemasPath) throws IOException {
ObjectMapper objectMapper = new ObjectMapper();
FileReader fileReader = new FileReader(mappingFilePath);
Map<String, String> mappings = new HashMap<>();
for (JsonNode mapping : objectMapper.readTree(fileReader.readFile())) {
String localURL = mapping.get("localURL").asText();
if (isMappingValid(schemasPath, localURL)) {
mappings.put(mapping.get("publicURL").asText(), localURL);
} else {
logger.warn("Mapping for publicURL ({}) will not be added to validator.", mapping.get("publicURL"));
}
}
return mappings;
}
private boolean isMappingValid(String schemasPath, String localURL) throws IOException {
String schemaRelativePath = schemasPath + File.separator + localURL;
return doesLocalFileExist(schemaRelativePath) && isFileValidSchema(schemaRelativePath);
}
private boolean isFileValidSchema(String schemaRelativePath) throws IOException {
String schemaContent = new FileReader(schemaRelativePath).readFile();
return isNotEmpty(schemaContent, schemaRelativePath) && isYaml(schemaContent, schemaRelativePath);
}
private boolean isNotEmpty(String schemaContent, String schemaRelativePath) {
if (schemaContent.isEmpty()) {
logger.warn("Schema file is empty. Schema path: {}", schemaRelativePath);
return false;
}
return true;
}
private boolean isYaml(String schemaContent, String schemaRelativePath) throws IOException {
ObjectMapper yamlMapper = new ObjectMapper(new YAMLFactory()).findAndRegisterModules();
try {
yamlMapper.readTree(schemaContent);
} catch (JsonParseException e) {
logger.warn("Schema has incorrect YAML structure. Schema path: {}", schemaRelativePath);
return false;
}
return true;
}
private boolean doesLocalFileExist(String schemaRelativePath) {
FileReader fileReader = new FileReader(schemaRelativePath);
if (!fileReader.doesFileExists()) {
logger.warn("Local schema resource missing. Schema file with path {} has not been found.", schemaRelativePath);
return false;
}
return true;
}
}
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