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/*
 * Copyright (c) 2008-2017 The Aspectran Project
 *
 * 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.
 */
package com.aspectran.core.util;

import com.aspectran.core.util.logging.Log;
import com.aspectran.core.util.logging.LogFactory;

import java.security.AccessControlException;

/**
 * Helpers for java.lang.System.
 */
public class SystemUtils {

    private static final Log log = LogFactory.getLog(SystemUtils.class);

    public static String getProperty(String name) {
        try {
            return System.getProperty(name);
        } catch (AccessControlException ex) {
            log.info(String.format(
                    "Caught AccessControlException when accessing system property [%s]; its value will be returned [null]. Reason: %s",
                    name, ex.getMessage()));
        }
        return null;
    }

    public static String getProperty(String name, String defVal) {
        String val = null;
        try {
            val = System.getProperty(name);
        } catch (AccessControlException ex) {
            if (log.isDebugEnabled()) {
                log.debug(String.format(
                        "Caught AccessControlException when accessing system property [%s]; its value will be returned [null]. Reason: %s",
                        name, ex.getMessage()));
            }
        }
        return (val != null ? val : defVal);
    }

}