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org.apache.commons.configuration.BaseConfiguration	100%	100%

1		/*
2		* Copyright 2001-2005 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.commons.configuration;
18
19		import java.util.ArrayList;
20		import java.util.Iterator;
21		import java.util.List;
22		import java.util.Map;
23
24		import org.apache.commons.collections.map.LinkedMap;
25
26		/**
27		* Basic configuration classe. Stores the configuration data but does not
28		* provide any load or save functions. If you want to load your Configuration
29		* from a file use PropertiesConfiguration or XmlConfiguration.
30		*
31		* This class extends normal Java properties by adding the possibility
32		* to use the same key many times concatenating the value strings
33		* instead of overwriting them.
34		*
35		* @author <a href="mailto:stefano@apache.org">Stefano Mazzocchi</a>
36		* @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
37		* @author <a href="mailto:daveb@miceda-data">Dave Bryson</a>
38		* @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
39		* @author <a href="mailto:leon@opticode.co.za">Leon Messerschmidt</a>
40		* @author <a href="mailto:kjohnson@transparent.com">Kent Johnson</a>
41		* @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
42		* @author <a href="mailto:ipriha@surfeu.fi">Ilkka Priha</a>
43		* @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
44		* @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl</a>
45		* @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
46		* @author <a href="mailto:ksh@scand.com">Konstantin Shaposhnikov</a>
47		* @author <a href="mailto:oliver.heger@t-online.de">Oliver Heger</a>
48		* @version $Id: BaseConfiguration.java 239602 2005-08-24 11:15:27Z ebourg $
49		*/
50	5090	public class BaseConfiguration extends AbstractConfiguration
51		{
52		/** stores the configuration key-value pairs */
53	2545	private Map store = new LinkedMap();
54
55		/**
56		* Adds a key/value pair to the map. This routine does no magic morphing.
57		* It ensures the keylist is maintained
58		*
59		* @param key key to use for mapping
60		* @param value object to store
61		*/
62		protected void addPropertyDirect(String key, Object value)
63		{
64	60861	Object previousValue = getProperty(key);
65
66	60861	if (previousValue == null)
67		{
68	37410	store.put(key, value);
69		}
70	23451	else if (previousValue instanceof List)
71		{
72		// the value is added to the existing list
73	6573	((List) previousValue).add(value);
74		}
75		else
76		{
77		// the previous value is replaced by a list containing the previous value and the new value
78	16878	List list = new ArrayList();
79	16878	list.add(previousValue);
80	16878	list.add(value);
81
82	16878	store.put(key, list);
83		}
84	60861	}
85
86		/**
87		* Read property from underlying map.
88		*
89		* @param key key to use for mapping
90		*
91		* @return object associated with the given configuration key.
92		*/
93		public Object getProperty(String key)
94		{
95	65295	return store.get(key);
96		}
97
98		/**
99		* Check if the configuration is empty
100		*
101		* @return <code>true</code> if Configuration is empty,
102		* <code>false</code> otherwise.
103		*/
104		public boolean isEmpty()
105		{
106	21	return store.isEmpty();
107		}
108
109		/**
110		* check if the configuration contains the key
111		*
112		* @param key the configuration key
113		*
114		* @return <code>true</code> if Configuration contain given key,
115		* <code>false</code> otherwise.
116		*/
117		public boolean containsKey(String key)
118		{
119	3540	return store.containsKey(key);
120		}
121
122		/**
123		* Clear a property in the configuration.
124		*
125		* @param key the key to remove along with corresponding value.
126		*/
127		public void clearProperty(String key)
128		{
129	2400	if (containsKey(key))
130		{
131	147	store.remove(key);
132		}
133	2400	}
134
135		/**
136		* {@inheritDoc}
137		*/
138		public void clear()
139		{
140	6	store.clear();
141	6	}
142
143		/**
144		* Get the list of the keys contained in the configuration
145		* repository.
146		*
147		* @return An Iterator.
148		*/
149		public Iterator getKeys()
150		{
151	354	return store.keySet().iterator();
152		}
153		}

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