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Java > Open Source Codes > com > hp > hpl > jena > graph > impl > ReifierFragmentHandler


1 /*
2      (c) Copyright 2004, 2005 Hewlett-Packard Development Company, LP, all rights reserved.
3      [See end of file]
4      $Id: ReifierFragmentHandler.java,v 1.3 2005/02/21 11:52:10 andy_seaborne Exp $
5 */
6
7 package com.hp.hpl.jena.graph.impl;
8
9 import com.hp.hpl.jena.graph.Node;
10 import com.hp.hpl.jena.graph.Triple;
11
12 /**
13      ReifierFragmentHandler: instances of this class handle fragments of reifications,
14      ie the triples (tag rdf:subject/predicate/object X) and (tag rdf:type Statement).
15      They are delivered from FragmentHandler instances and remain bound to
16      their originating instance.
17      
18      @author kers
19 */
20 public interface ReifierFragmentHandler
21     {
22     /**
23          If this handler clashed with the complete reification of <code>reified</code>,
24          because its predicate and the given object aren't the same as that of
25          <code>reified</code>, add all five fragments to the its underlying
26          fragmentsMap and answer <code>true</code>; otherwise answer
27          <code>false</code>.
28          
29          @param fragmentObject the object of the reification fragment
30          @param reified the completely reified triple
31          @return true iff the fragment clashed with the triple
32     */
33     public abstract boolean clashedWith( Node fragmentObject, Triple reified );
34
35     /**
36          If this <code>fragment</code> completes a reification for <code>tag</code>,
37          remove all the fragments from the underlying fragmentsMap and answer the
38          reified triple; otherwise add this fragment to the map and answer
39          <code>null</code>.
40          
41          @param fragment the new fragment to consider
42          @param tag the tag for the reification [equals the fragment subject]
43          @param object the object of the fragment. Hmm.
44          @return the reified triple, if there is one, otherwise null
45     */
46     public abstract Triple reifyIfCompleteQuad( Triple fragment, Node tag, Node object );
47
48     /**
49      * @param tag
50      * @param already
51      * @param fragment
52      * @return
53      */
54     public abstract Triple removeFragment( Node tag, Triple already, Triple fragment );
55     }
56
57 /*
58      (c) Copyright 2004, 2005 Hewlett-Packard Development Company, LP
59      All rights reserved.
60     
61      Redistribution and use in source and binary forms, with or without
62      modification, are permitted provided that the following conditions
63      are met:
64     
65      1. Redistributions of source code must retain the above copyright
66      notice, this list of conditions and the following disclaimer.
67     
68      2. Redistributions in binary form must reproduce the above copyright
69      notice, this list of conditions and the following disclaimer in the
70      documentation and/or other materials provided with the distribution.
71     
72      3. The name of the author may not be used to endorse or promote products
73      derived from this software without specific prior written permission.
74     
75      THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
76      IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
77      OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
78      IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
79      INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
80      NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
81      DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
82      THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
83      (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
84      THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
85  */
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