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Java > Open Source Codes > org > apache > jetspeed > util > BaseConfig


1 /*
2  * Copyright 2000-2001,2004 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 package org.apache.jetspeed.util;
18
19 //standard java stuff
20 import java.util.Hashtable JavaDoc;
21 import java.util.Map JavaDoc;
22 import java.util.Iterator JavaDoc;
23
24 /**
25 Defines a standard object configuration
26 A Config provides the parameters passed in the current request as well
27 as init parameters.
28
29 @author <a HREF="mailto:raphael@apache.org">Raphaël Luta</a>
30 @version $Id: BaseConfig.java,v 1.3 2004/02/23 03:23:42 jford Exp $
31 */
32
33 public class BaseConfig extends Hashtable JavaDoc implements Config
34 {
35
36     private String JavaDoc name = null;
37
38     /**
39     Returns the name for this configuration
40     */
41     public String JavaDoc getName()
42     {
43         return this.name;
44     }
45
46     /**
47     Sets the name of this configuration
48     */
49     public void setName(String JavaDoc name)
50     {
51         this.name = name;
52     }
53
54     /**
55     Used to define a Portlet's parameters.
56     */
57     public void setInitParameters( Map JavaDoc init_params )
58     {
59         clear();
60         putAll( init_params );
61     }
62
63     /**
64     Used to override Portlet's parameters.
65     */
66     public void addInitParameters( Map JavaDoc init_params )
67     {
68         Iterator JavaDoc keys = init_params.keySet().iterator();
69         
70         while (keys.hasNext() )
71         {
72             String JavaDoc key = (String JavaDoc)keys.next();
73             
74             if( ! containsKey( key ) )
75             {
76                 put( key , (String JavaDoc)init_params.get( key ) );
77             }
78         }
79     }
80
81
82     /**
83     Retrieves the PortletController parameters
84     */
85     public Map JavaDoc getInitParameters()
86     {
87         return this;
88     }
89
90
91     /**
92     Used to define a PortletController's parameter.if value is null, removes
93     the key from the stored properties
94     */
95     public void setInitParameter(String JavaDoc name, Object JavaDoc value)
96     {
97         if (name!=null)
98         {
99             if (value==null)
100             {
101                 remove(name);
102             }
103             else
104             {
105                 put(name,value);
106             }
107         }
108     }
109
110     /**
111     Returns a parameter (or null) that was given the controller.
112     */
113     public String JavaDoc getInitParameter(String JavaDoc name)
114     {
115         return getInitParameter( name, null );
116     }
117
118     /**
119     Returns a parameter (or defaultValue) that was given the controller.
120     */
121     public String JavaDoc getInitParameter(String JavaDoc name, String JavaDoc defaultValue)
122     {
123         String JavaDoc value = null;
124
125         try
126         {
127             value=(String JavaDoc)get(name);
128             if (value==null) value=defaultValue;
129         }
130         catch (RuntimeException JavaDoc e)
131         {
132             value=defaultValue;
133         }
134
135         return value;
136     }
137
138     /**
139     Returns the parameter names of this Config.
140     */
141     public Iterator JavaDoc getInitParameterNames()
142     {
143         return keySet().iterator();
144     }
145
146 }
147
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