com.diozero.util.PropertyUtil Maven / Gradle / Ivy
package com.diozero.util;
/*
* #%L
* Organisation: mattjlewis
* Project: Device I/O Zero - Core
* Filename: PropertyUtil.java
*
* This file is part of the diozero project. More information about this project
* can be found at http://www.diozero.com/
* %%
* Copyright (C) 2016 - 2017 mattjlewis
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
public class PropertyUtil {
public static boolean isPropertySet(String key) {
return getProperty(key, null) != null;
}
public static int getIntProperty(String key, int defaultValue) {
int result = defaultValue;
String val = getProperty(key, null);
if (val != null) {
try {
result = Integer.parseInt(val);
} catch (NumberFormatException e) {
// Ignore
}
}
return result;
}
public static boolean getBooleanProperty(String key, boolean defaultValue) {
boolean result = defaultValue;
String val = getProperty(key, null);
if (val != null) {
result = Boolean.parseBoolean(val);
}
return result;
}
public static String getProperty(String key, String defaultValue) {
// System properties (-D) take priority over environment variables
return System.getProperties().getProperty(key, System.getenv().getOrDefault(key, defaultValue));
}
}