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Java > Open Source Codes > org > apache > pluto > core > impl > PreferencesValidatorImpl


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 java.util.ArrayList JavaDoc;
23 import java.util.Collection JavaDoc;
24 import java.util.Enumeration JavaDoc;
25
26 import javax.portlet.PortletPreferences;
27 import javax.portlet.PreferencesValidator;
28 import javax.portlet.ValidatorException;
29
30 public class PreferencesValidatorImpl implements PreferencesValidator
31 {
32
33     public PreferencesValidatorImpl()
34     {
35     }
36
37     public void validate(PortletPreferences preferences)
38         throws ValidatorException
39     {
40       Collection JavaDoc failedKeys = new ArrayList JavaDoc();
41       Enumeration JavaDoc names = preferences.getNames();
42
43       String JavaDoc[] defValues = {"no values"};
44       String JavaDoc[] values = null;
45       String JavaDoc key = null;
46
47       while (names.hasMoreElements())
48       {
49           key = names.nextElement().toString();
50           values = preferences.getValues(key, defValues);
51
52           if (values != null) // null values are allowed
53 {
54               for (int i=0; i<values.length;i++)
55               {
56                   if (values[i] != null) // null values are allowed
57 {
58                       //validates that the preferences do not start or end with white space
59 if (!values[i].equalsIgnoreCase(values[i].trim()))
60                       {
61                           failedKeys.add(key);
62                           i=values.length;
63                       }
64                   }
65               }
66           }
67       }
68
69       if (!failedKeys.isEmpty())
70       {
71           throw new ValidatorException("One or more preferences do not comply with the validation criteria",failedKeys);
72       }
73     }
74 }
75
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