org.apache.juneau.internal.SystemUtils Maven / Gradle / Ivy
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// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance *
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// * *
// * http://www.apache.org/licenses/LICENSE-2.0 *
// * *
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// ***************************************************************************************************************************
package org.apache.juneau.internal;
/**
* System utilities.
*/
public class SystemUtils {
/**
* Returns the first non-null system property.
*
* @param def
* The default value if none are found.
* Can be null .
* @param keys
* The system properties to look for.
* @return
* The first non-null system property, or the default value if non were found.
*/
public static String getFirstString(String def, String...keys) {
for (String key : keys) {
String v = System.getProperty(key);
if (v != null)
return v;
}
return def;
}
/**
* Returns the first non-null boolean system property.
*
* @param def
* The default value if none are found.
* Can be null .
* @param keys
* The system properties to look for.
* @return
* The first non-null system property, or the default value if non were found.
*/
public static Boolean getFirstBoolean(Boolean def, String...keys) {
String s = getFirstString(null, keys);
return s == null ? def : Boolean.parseBoolean(s);
}
/**
* Returns the first non-null integer system property.
*
* @param def
* The default value if none are found.
* Can be null .
* @param keys
* The system properties to look for.
* @return
* The first non-null system property, or the default value if non were found.
*/
public static Integer getFirstInteger(Integer def, String...keys) {
String s = getFirstString(null, keys);
return s == null ? def : Integer.parseInt(s);
}
}