org.apache.commons.lang3.SystemUtils Maven / Gradle / Ivy
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.commons.lang3;
/**
* Cropped version of SystemUtils from Apache Commons Lang v3.5.
* Used in WordUtils.
*/
public class SystemUtils {
/**
*
* The {@code line.separator} System Property. Line separator ("\n" on UNIX).
*
*
* Defaults to {@code null} if the runtime does not have security access to read this property or the property does
* not exist.
*
*
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)} or
* {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value will be out of
* sync with that System property.
*
*
* @since Java 1.1
*/
public static final String LINE_SEPARATOR = getSystemProperty("line.separator");
// -----------------------------------------------------------------------
/**
*
* Gets a System property, defaulting to {@code null} if the property cannot be read.
*
*
* If a {@code SecurityException} is caught, the return value is {@code null} and a message is written to
* {@code System.err}.
*
*
* @param property the system property name
* @return the system property value or {@code null} if a security problem occurs
*/
private static String getSystemProperty(final String property) {
try {
return System.getProperty(property);
} catch (final SecurityException ex) {
// we are not allowed to look at this property
System.err.println("Caught a SecurityException reading the system property '" + property
+ "'; the SystemUtils property value will default to null.");
return null;
}
}
}