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Java > Open Source Codes > org > sapia > archie > strategy > LookupStrategy


1 package org.sapia.archie.strategy;
2
3 import org.sapia.archie.Name;
4 import org.sapia.archie.Node;
5 import org.sapia.archie.NotFoundException;
6 import org.sapia.archie.ProcessingException;
7
8
9 /**
10  * This interface specifies lookup strategy behavior. It decouples lookup
11  * logic from node implementations. Different strategies can be implemented,
12  * according to applications needs, without having to mingle with node
13  * implementations.
14  *
15  * @author Yanick Duchesne
16  *
17  * <dl>
18  * <dt><b>Copyright:</b><dd>Copyright &#169; 2002-2003 <a HREF="http://www.sapia-oss.org">Sapia Open Source Software</a>. All Rights Reserved.</dd></dt>
19  * <dt><b>License:</b><dd>Read the license.txt file of the jar or visit the
20  * <a HREF="http://www.sapia-oss.org/license.html">license page</a> at the Sapia OSS web site</dd></dt>
21  * </dl>
22  */
23 public interface LookupStrategy {
24   
25   /**
26    * Performs the lookup operation from the given node.
27    *
28    * @param n the <code>Name</code> of the value to lookup.
29    * @param from the <code>Node</code> from which the search starts.
30    * @return the <code>Object</code> that corresponds to the given name.
31    *
32    * @throws NotFoundException if no object is found for the given name.
33    * @throws ProcessingException if a problem occurs while performing the lookup.
34    */
35   public Object JavaDoc lookup(Name n, Node from)
36                 throws NotFoundException, ProcessingException;
37 }
38
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