nucleus/common/common-util/src/main/java/com/sun/enterprise/universal/SystemProps.java

/*
 * Copyright (c) 2008, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

/*
 * SystemProps.java
 *
 * Created on October 2, 2001, 2:53 PM
 */

package com.sun.enterprise.universal;

import java.util.*;

import com.sun.enterprise.util.StringUtils;

/**
 *
 * @author  bnevins
 * @version
 */
public class SystemProps
{
    public static List<Map.Entry> get()
    {
        Properties p = System.getProperties();
        // these 2 lines woul;d be nice -- but it's case-sensitive...
        //Map sortedMap = new TreeMap(p);
        //Set sortedSet = sortedMap.entrySet();
        Set<Map.Entry<Object, Object>>  set  = p.entrySet();
        List<Map.Entry>        list = new ArrayList<Map.Entry>(set);

        Collections.sort(list, new Comparator<Map.Entry>()
        {
            public int compare(Map.Entry me1, Map.Entry me2)
            {
                return ((String)me1.getKey()).compareToIgnoreCase((String)me2.getKey());
            }
        });

        return list;
    }

    ///////////////////////////////////////////////////////////////////////////

    public static String toStringStatic()
    {
        int             longestKey        = 0;
        List<Map.Entry>        list                = get();
        StringBuffer        sb                = new StringBuffer();

        /* Go through the list twice.
         * The first time through gets the maximum length entry
         * The second time through uses that info for 'pretty printing'
         */

        for(Map.Entry entry : list)
        {
            int len = ((String)entry.getKey()).length();

            if(len > longestKey)
                longestKey = len;
        }

        longestKey += 1;

        for(Map.Entry entry : list)
        {
            sb.append(StringUtils.padRight((String)entry.getKey(), longestKey));
            sb.append("= ");
            sb.append((String)entry.getValue());
            sb.append("\n");
        }

        return sb.toString();
    }

    ///////////////////////////////////////////////////////////////////////////

    private SystemProps()
    {
    }

    ///////////////////////////////////////////////////////////////////////////

    public static void main(String[] args)
    {
        System.out.println(toStringStatic());
    }
}