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Java > Open Source Codes > org > apache > avalon > excalibur > naming > memory > MemoryContext


1 /*
2
3  ============================================================================
4                    The Apache Software License, Version 1.1
5  ============================================================================
6  
7  Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8  
9  Redistribution and use in source and binary forms, with or without modifica-
10  tion, are permitted provided that the following conditions are met:
11  
12  1. Redistributions of source code must retain the above copyright notice,
13     this list of conditions and the following disclaimer.
14  
15  2. Redistributions in binary form must reproduce the above copyright notice,
16     this list of conditions and the following disclaimer in the documentation
17     and/or other materials provided with the distribution.
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19  3. The end-user documentation included with the redistribution, if any, must
20     include the following acknowledgment: "This product includes software
21     developed by the Apache Software Foundation (http://www.apache.org/)."
22     Alternately, this acknowledgment may appear in the software itself, if
23     and wherever such third-party acknowledgments normally appear.
24  
25  4. The names "Jakarta", "Avalon", "Excalibur" and "Apache Software Foundation"
26     must not be used to endorse or promote products derived from this software
27     without prior written permission. For written permission, please contact
28     apache@apache.org.
29  
30  5. Products derived from this software may not be called "Apache", nor may
31     "Apache" appear in their name, without prior written permission of the
32     Apache Software Foundation.
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34  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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39  DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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45  This software consists of voluntary contributions made by many individuals
46  on behalf of the Apache Software Foundation. For more information on the
47  Apache Software Foundation, please see <http://www.apache.org/>.
48  
49 */

50 package org.apache.avalon.excalibur.naming.memory;
51
52 import java.util.Hashtable JavaDoc;
53
54 import javax.naming.Context JavaDoc;
55 import javax.naming.Name JavaDoc;
56 import javax.naming.NameNotFoundException JavaDoc;
57 import javax.naming.NamingEnumeration JavaDoc;
58 import javax.naming.NamingException JavaDoc;
59
60 import org.apache.avalon.excalibur.naming.AbstractLocalContext;
61 import org.apache.avalon.excalibur.naming.Namespace;
62
63 /**
64  * An in memory context implementation.
65  *
66  * @author <a HREF="mailto:peter@apache.org">Peter Donald</a>
67  * @version $Revision: 1.1 $
68  * @deprecated Toolkit deprecated and replaced by http://spice.sourceforge.net/jndikit/
69  */

70 public class MemoryContext
71     extends AbstractLocalContext
72 {
73     private Hashtable JavaDoc m_bindings;
74
75     protected MemoryContext( final Namespace namespace,
76                              final Hashtable JavaDoc environment,
77                              final Context JavaDoc parent,
78                              final Hashtable JavaDoc bindings )
79     {
80         super( namespace, environment, parent );
81         m_bindings = bindings;
82     }
83
84     public MemoryContext( final Namespace namespace,
85                           final Hashtable JavaDoc environment,
86                           final Context JavaDoc parent )
87     {
88         this( namespace, environment, parent, new Hashtable JavaDoc( 11 ) );
89     }
90
91     protected Context JavaDoc newContext()
92         throws NamingException JavaDoc
93     {
94         return new MemoryContext( getNamespace(), getRawEnvironment(), getParent() );
95     }
96
97     protected Context JavaDoc cloneContext()
98         throws NamingException JavaDoc
99     {
100         return new MemoryContext( getNamespace(), getRawEnvironment(), getParent(), m_bindings );
101     }
102
103     protected void doLocalBind( final Name JavaDoc name, final Object JavaDoc object )
104         throws NamingException JavaDoc
105     {
106         m_bindings.put( name.get( 0 ), object );
107     }
108
109     protected NamingEnumeration JavaDoc doLocalList()
110         throws NamingException JavaDoc
111     {
112         return new MemoryNamingEnumeration( this, getNamespace(), m_bindings, false );
113     }
114
115     protected NamingEnumeration JavaDoc doLocalListBindings()
116         throws NamingException JavaDoc
117     {
118         return new MemoryNamingEnumeration( this, getNamespace(), m_bindings, true );
119     }
120
121     /**
122      * Actually lookup raw entry in local context.
123      * When overidding this it is not neccesary to resolve references etc.
124      *
125      * @param name the name in local context (size() == 1)
126      * @return the bound object
127      * @exception NamingException if an error occurs
128      */

129     protected Object JavaDoc doLocalLookup( final Name JavaDoc name )
130         throws NamingException JavaDoc
131     {
132         final Object JavaDoc object = m_bindings.get( name.get( 0 ) );
133         if( null == object ) throw new NameNotFoundException JavaDoc( name.get( 0 ) );
134         return object;
135     }
136
137     /**
138      * Actually unbind raw entry in local context.
139      *
140      * @param name the name in local context (size() == 1)
141      * @exception NamingException if an error occurs
142      */

143     protected void doLocalUnbind( final Name JavaDoc name )
144         throws NamingException JavaDoc
145     {
146         m_bindings.remove( name.get( 0 ) );
147     }
148 }
149
150
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