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Java > Open Source Codes > com > hp > hpl > jena > reasoner > dig > DIGQueryTypesTranslator


1 /*****************************************************************************
2  * Source code information
3  * -----------------------
4  * Original author Ian Dickinson, HP Labs Bristol
5  * Author email Ian.Dickinson@hp.com
6  * Package Jena 2
7  * Web http://sourceforge.net/projects/jena/
8  * Created July 19th 2003
9  * Filename $RCSfile: DIGQueryTypesTranslator.java,v $
10  * Revision $Revision: 1.7 $
11  * Release status $State: Exp $
12  *
13  * Last modified on $Date: 2005/03/16 18:52:28 $
14  * by $Author: ian_dickinson $
15  *
16  * (c) Copyright 2001, 2002, 2003, 2004, 2005 Hewlett-Packard Development Company, LP
17  * [See end of file]
18  * ****************************************************************************/
19
20 // Package
21 ///////////////
22 package com.hp.hpl.jena.reasoner.dig;
23
24
25 // Imports
26 ///////////////
27 import org.w3c.dom.*;
28
29 import com.hp.hpl.jena.rdf.model.Model;
30 import com.hp.hpl.jena.reasoner.TriplePattern;
31 import com.hp.hpl.jena.util.iterator.*;
32
33
34
35 /**
36  * <p>
37  * Translator that generates DIG 'types' queries in response to a find queries:
38  * <pre>
39  * :i rdf:type *
40  * </pre>
41  * or similar.
42  * </p>
43  *
44  * @author Ian Dickinson, HP Labs (<a HREF="mailto:Ian.Dickinson@hp.com">email</a>)
45  * @version CVS $Id: DIGQueryTypesTranslator.java,v 1.7 2005/03/16 18:52:28 ian_dickinson Exp $
46  */
47 public class DIGQueryTypesTranslator
48     extends DIGQueryTranslator
49 {
50
51     // Constants
52 //////////////////////////////////
53
54     // Static variables
55 //////////////////////////////////
56
57     // Instance variables
58 //////////////////////////////////
59
60
61     // Constructors
62 //////////////////////////////////
63
64     /**
65      * <p>Construct a translator for the DIG query 'instances'.</p>
66      * @param predicate The predicate URI to trigger on
67      */
68     public DIGQueryTypesTranslator( String JavaDoc predicate ) {
69         super( null, predicate, ALL );
70     }
71
72
73     // External signature methods
74 //////////////////////////////////
75
76
77     /**
78      * <p>Answer a query that will list the instances of a concept</p>
79      */
80     public Document translatePattern( TriplePattern pattern, DIGAdapter da ) {
81         DIGConnection dc = da.getConnection();
82         Document query = dc.createDigVerb( DIGProfile.ASKS, da.getProfile() );
83
84         Element types = da.createQueryElement( query, DIGProfile.TYPES );
85         da.addNamedElement( types, DIGProfile.INDIVIDUAL, da.getNodeID( pattern.getSubject() ) );
86
87         return query;
88     }
89
90
91     /**
92      * <p>Answer an iterator of triples that match the original find query.</p>
93      */
94     public ExtendedIterator translateResponseHook( Document response, TriplePattern query, DIGAdapter da ) {
95         // translate the concept set to triples, but then we must add :a rdfs:subClassOf :a to match owl semantics
96 return translateConceptSetResponse( response, query, true, da );
97     }
98
99
100     public Document translatePattern( TriplePattern pattern, DIGAdapter da, Model premises ) {
101         // not used
102 return null;
103     }
104
105     public boolean checkSubject( com.hp.hpl.jena.graph.Node subject, DIGAdapter da, Model premises ) {
106         return subject.isConcrete() && da.isIndividual( subject );
107     }
108
109
110     // Internal implementation methods
111 //////////////////////////////////
112
113     //==============================================================================
114 // Inner class definitions
115 //==============================================================================
116
117 }
118
119
120 /*
121  * (c) Copyright 2001, 2002, 2003, 2004, 2005 Hewlett-Packard Development Company, LP
122  * All rights reserved.
123  *
124  * Redistribution and use in source and binary forms, with or without
125  * modification, are permitted provided that the following conditions
126  * are met:
127  * 1. Redistributions of source code must retain the above copyright
128  * notice, this list of conditions and the following disclaimer.
129  * 2. Redistributions in binary form must reproduce the above copyright
130  * notice, this list of conditions and the following disclaimer in the
131  * documentation and/or other materials provided with the distribution.
132  * 3. The name of the author may not be used to endorse or promote products
133  * derived from this software without specific prior written permission.
134  *
135  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
136  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
137  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
138  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
139  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
140  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
144  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145  */
146
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