Resource


1   package org.exoplatform.services.xml.querying.impl.xtas.resource;
2   
3   import java.io.IOException  ;
4   import org.exoplatform.services.xml.querying.ConfigException;
5   import org.exoplatform.services.xml.querying.UniFormTransformationException;
6   import org.exoplatform.services.xml.querying.XMLWellFormedData;
7   
8   /**
9    * Abstract class encapsulated Persistence storage for the XML data 
10   * @version $Id: Resource.java 566 2005-01-25 12:50:49Z kravchuk $
11   */
12  abstract public class Resource
13  {
14      protected String   resourceId;
15  
16      /**
17       * Loads XML from some resource 
18       */
19      public abstract XMLWellFormedData load() throws UniFormTransformationException, IOException   ;
20  
21      /**
22       * Stores XML into some resource 
23       */
24      public abstract void save(XMLWellFormedData tree) throws UniFormTransformationException, IOException   ;
25  
26      /**
27       * Creates resource 
28       */
29      public abstract void create(XMLWellFormedData initTree) throws IOException   ;
30  
31      /**
32       * drops resource 
33       */
34      public abstract void drop() throws IOException  ;
35  
36      /**
37       * Initializes Resource's context (if any)
38       */
39      public abstract void setContext(Object   context);
40  
41      /**
42       * Initializes Resource
43       */
44      public void init(String   resourceId) throws ConfigException
45      {
46         this.resourceId = resourceId;
47      }
48  
49      public String   toString()
50      {
51         return this.resourceId;
52      }
53  
54      /**
55       * Returns first element will be insert to any query on this resource
56       */
57      public String   getXPathPrefix()
58      {
59         return null;
60      }
61  
62      /**
63       * Closes Resource
64       */
65      public void close()
66      {
67      }
68  
69  }
70

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