ebfc4513e0
Please note that the build will fail at the moment due to various checkstyle violations which should be fixed soon
84 lines
2.5 KiB
Java
84 lines
2.5 KiB
Java
/*
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* Copyright 2011 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.util.internal;
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import java.util.regex.Pattern;
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/**
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* Accesses the system property swallowing a {@link SecurityException}.
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*/
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public final class SystemPropertyUtil {
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/**
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* Returns the value of the Java system property with the specified
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* {@code key}.
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*
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* @return the property value.
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* {@code null} if there's no such property or if an access to the
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* specified property is not allowed.
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*/
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public static String get(String key) {
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try {
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return System.getProperty(key);
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} catch (Exception e) {
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return null;
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}
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}
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/**
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* Returns the value of the Java system property with the specified
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* {@code key}, while falling back to the specified default value if
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* the property access fails.
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*
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* @return the property value.
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* {@code def} if there's no such property or if an access to the
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* specified property is not allowed.
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*/
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public static String get(String key, String def) {
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String value = get(key);
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if (value == null) {
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value = def;
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}
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return value;
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}
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/**
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* Returns the value of the Java system property with the specified
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* {@code key}, while falling back to the specified default value if
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* the property access fails.
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*
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* @return the property value.
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* {@code def} if there's no such property or if an access to the
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* specified property is not allowed.
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*/
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public static int get(String key, int def) {
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String value = get(key);
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if (value == null) {
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return def;
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}
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if (Pattern.matches("-?[0-9]+", value)) {
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return Integer.parseInt(value);
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} else {
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return def;
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}
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}
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private SystemPropertyUtil() {
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// Unused
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}
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}
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