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/*-
* ============LICENSE_START=======================================================
* sdc-tosca
* ================================================================================
* Copyright (C) 2017 - 2019 AT&T Intellectual Property. 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.sdc.tosca.parser.config;
import com.google.common.base.Charsets;
import com.google.common.io.Resources;
import org.onap.sdc.tosca.parser.utils.YamlToObjectConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
public class ConfigurationManager {
private static Logger log = LoggerFactory.getLogger(ConfigurationManager.class.getName());
private static final String CONFIGURATION_DIR = "config/";
private static volatile ConfigurationManager instance;
Map<String, Object> configurations = new HashMap<String, Object>();
private ConfigurationManager() {
initialConfigObjectsFromFiles();
}
private void initialConfigObjectsFromFiles() {
loadConfigurationClass(ErrorConfiguration.class);
loadConfigurationClass(Configuration.class);
loadConfigurationClass(JtoscaValidationIssueConfiguration.class);
}
private <T> void loadConfigurationClass(Class<T> clazz) {
T object = getObjectFromYaml(clazz);
configurations.put(clazz.getSimpleName(), object);
}
private <T> void loadConfigurationClass(Class<T> clazz, String fileName) {
T object = getObjectFromYaml(clazz,fileName);
configurations.put(clazz.getSimpleName(), object);
}
public static <T> T getObjectFromYaml(Class<T> className) {
return getObjectFromYaml(className, null);
}
public static <T> T getObjectFromYaml(Class<T> className, String fileName) {
String configFileName = fileName != null ? fileName : calculateFileName(className); ;
URL url = Resources.getResource(CONFIGURATION_DIR + configFileName);
String configFileContents = null;
try {
configFileContents = Resources.toString(url, Charsets.UTF_8);
} catch (IOException e) {
log.error("ConfigurationManager - Failed to load configuration file {}", configFileName, e);
}
YamlToObjectConverter yamlToObjectConverter = new YamlToObjectConverter();
T object = yamlToObjectConverter.convertFromString(configFileContents, className);
return object;
}
public static ConfigurationManager getInstance() {
if (instance == null) {
synchronized (ConfigurationManager.class) {
if (instance == null) {
instance = new ConfigurationManager();
}
}
}
return instance;
}
private static <T> String calculateFileName(Class<T> className) {
String[] words = className.getSimpleName().split("(?=\\p{Upper})");
StringBuilder builder = new StringBuilder();
// There cannot be a null value returned from "split" - words != null is
// redundant
// if (words != null) {
boolean isFirst = true;
for (int i = 0; i < words.length; i++) {
String word = words[i];
if (word != null && !word.isEmpty()) {
if (!isFirst) {
builder.append("-");
} else {
isFirst = false;
}
builder.append(words[i].toLowerCase());
}
}
return builder.toString() + ".yaml";
/*
* } else { return className.getSimpleName().toLowerCase() + Constants.YAML_SUFFIX; }
*/
}
public ErrorConfiguration getErrorConfiguration() {
return (ErrorConfiguration) configurations.get((ErrorConfiguration.class.getSimpleName()));
}
public JtoscaValidationIssueConfiguration getJtoscaValidationIssueConfiguration() {
return (JtoscaValidationIssueConfiguration) configurations.get((JtoscaValidationIssueConfiguration.class.getSimpleName()));
}
public void setJtoscaValidationIssueConfiguration(String fileName) {
loadConfigurationClass(JtoscaValidationIssueConfiguration.class, fileName);
}
public Configuration getConfiguration() {
return (Configuration) configurations.get((Configuration.class.getSimpleName()));
}
public void setErrorConfiguration(String fileName) {
loadConfigurationClass(ErrorConfiguration.class, fileName);
}
}
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