/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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 org.seasar.teeda.core;

 import java.util.ArrayList;

 import java.util.Enumeration;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 import java.util.Properties;

 /**

  * @author shot

  */

 public class EnvironmentInfo {

     private EnvironmentInfo() {

     }

     public static List getEnvironmentInfo() {

         List list = new ArrayList();

         final Properties properties = System.getProperties();

         int length = 0;

         Map map = new HashMap();

         for (Enumeration e = properties.propertyNames(); e.hasMoreElements();) {

             String key = (String) e.nextElement();

             String value = null;

             if (key.length() > length) {

                 length = key.length();

             }

             Object object = properties.get(key);

             value = object.toString();

             map.put(key, value);

         }

         for (Iterator itr = map.entrySet().iterator(); itr.hasNext();) {

             Map.Entry entry = (Map.Entry) itr.next();

             String key = (String) entry.getKey();

             if (key.length() < length) {

                 key = key + appendBlank(length - key.length());

             }

             list.add(key + " : " + entry.getValue());

         }

         return list;

     }

     private static String appendBlank(int len) {

         StringBuffer buf = new StringBuffer();

         for (int i = 0; i < len; i++) {

             buf.append(" ");

         }

         return buf.toString();

     }

 }