reportbuilder/java/org/libreoffice/report/util/DefaultParameterMap.java

   1 /*
   2  * This file is part of the LibreOffice project.
   3  *
   4  * This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   7  *
   8  * This file incorporates work covered by the following license notice:
   9  *
  10  *   Licensed to the Apache Software Foundation (ASF) under one or more
  11  *   contributor license agreements. See the NOTICE file distributed
  12  *   with this work for additional information regarding copyright
  13  *   ownership. The ASF licenses this file to you under the Apache
  14  *   License, Version 2.0 (the "License"); you may not use this file
  15  *   except in compliance with the License. You may obtain a copy of
  16  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  17  */
  18 package org.libreoffice.report.util;
  19
  20 import org.libreoffice.report.ParameterMap;
  21
  22 import java.util.HashMap;
  23 import java.util.Map;
  24
  25
  26 public class DefaultParameterMap implements ParameterMap
  27 {
  28
  29     private final Map<String,Object> backend;
  30
  31     public DefaultParameterMap()
  32     {
  33         backend = new HashMap<String,Object>();
  34     }
  35
  36     /**
  37      * Retrieves the value stored for a key in this properties collection.
  38      *
  39      * @param key the property key.
  40      * @return The stored value, or <code>null</code> if the key does not exist in this
  41      *         collection.
  42      */
  43     public Object get(final String key)
  44     {
  45         if (key == null)
  46         {
  47             throw new NullPointerException("DefaultParameterMap.get (..): Parameter 'key' must not be null");
  48         }
  49         return backend.get(key);
  50     }
  51
  52     public String[] keys()
  53     {
  54         return this.backend.keySet().toArray(new String[backend.size()]);
  55     }
  56
  57 }