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1   /*
2    * Copyright 2003,2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  /* 
17  
18   */
19  
20  package org.apache.pluto.core.impl;
21  
22  import javax.portlet.*;
23  import java.util.*;
24  
25  public class PreferencesValidatorImpl implements PreferencesValidator
26  {
27  
28      public PreferencesValidatorImpl()
29      {
30      }
31  
32      public void validate(PortletPreferences preferences)
33          throws ValidatorException
34      {
35        Collection failedKeys = new ArrayList();
36        Enumeration names = preferences.getNames();
37  
38        String[] defValues = {"no values"};
39        String[] values = null;
40        String key = null;
41  
42        while (names.hasMoreElements())
43        {
44            key = names.nextElement().toString();
45            values = preferences.getValues(key, defValues);
46  
47            if (values != null) // null values are allowed
48            {
49                for (int i=0; i<values.length;i++)
50                {
51                    if (values[i] != null) // null values are allowed
52                    {
53                        //validates that the preferences do not start or end with white space
54                        if (!values[i].equalsIgnoreCase(values[i].trim()))
55                        {
56                            failedKeys.add(key);
57                            i=values.length;
58                        }
59                    }
60                }
61            }
62        }
63  
64        if (!failedKeys.isEmpty())
65        {
66            throw new ValidatorException("One or more preferences do not comply with the validation criteria",failedKeys);
67        }
68      }
69  }