package org.apache.maven.properties.internal;

/*
 * 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.
 */

import java.util.Properties;

/**
 * @since 3.2.3
 */
public class SystemProperties
{
    /**
     * Thread-safe System.properties copy implementation.
     *
     * @see http://jira.codehaus.org/browse/MNG-5670
     */
    public static void addSystemProperties( Properties props )
    {
        for ( String key : System.getProperties().stringPropertyNames() )
        {
            props.put( key, System.getProperty( key ) );
        }
    }

    /**
     * Returns System.properties copy.
     */
    public static Properties getSystemProperties()
    {
        Properties systemProperties = new Properties();
        addSystemProperties( systemProperties );
        return systemProperties;
    }
}
