com.thematchbox.settings.AbstractSettings Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of TheMatchBox-Common Show documentation
Show all versions of TheMatchBox-Common Show documentation
This project contains some common utilities used in different projects from theMatchBox.
package com.thematchbox.settings;
/* Copyright 2015 theMatchBox
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.
*/
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
public abstract class AbstractSettings {
public static final Logger logger = LoggerFactory.getLogger(AbstractSettings.class);
public static S load(Class clazz, String configFile) {
File file = new File(configFile);
if (file.exists()) {
try (InputStream inputStream = new FileInputStream(file)) {
return load(clazz, inputStream);
} catch (IOException e) {
logger.error("Failed to load settings file " + file.getPath(), e);
}
}
return createNewConfig(clazz, configFile);
}
public static S createNewConfig(Class clazz, String configFile) {
try {
java.lang.reflect.Constructor constructor = clazz.getConstructor();
S newInstance = constructor.newInstance();
newInstance.write(configFile);
return newInstance;
} catch (NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
logger.error(e.getMessage(), e);
return null;
}
}
public static S load(Class clazz, InputStream inputStream) {
if (inputStream == null) {
logger.error("Failed to load settings file as resource.");
return null;
}
Yaml yaml = new Yaml(new Constructor(clazz));
//noinspection unchecked
return (S) yaml.load(inputStream);
}
public void write(String configFile) {
Yaml yaml = new Yaml();
File file = new File(configFile);
String s = yaml.dumpAsMap(this);
try {
FileUtils.writeStringToFile(file, s);
} catch (IOException e) {
logger.error("Failed to write analyser settings to file " + file.getPath(), e);
}
}
}