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Java > Open Source Codes > org > xquark > extractor > sybase > SybaseQueryFactory


1 /*
2  * This file belongs to the XQuark distribution.
3  * Copyright (C) 2003 Universite de Versailles Saint-Quentin.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307.
18  * You can also get it at http://www.gnu.org/licenses/lgpl.html
19  *
20  * For more information on this software, see http://www.xquark.org.
21  */
22
23 package org.xquark.extractor.sybase;
24
25 import org.xquark.extractor.algebra.*;
26 import org.xquark.extractor.metadata.MetaDataManager;
27 import org.xquark.extractor.runtime.QueryFactory;
28 import org.xquark.extractor.runtime.Query;
29 import org.xquark.xml.xdbc.XMLDBCException;
30 import org.xquark.xquery.metadata.resolver.MetadataAccess;
31 import org.xquark.xquery.parser.XQueryExpression;
32
33 public class SybaseQueryFactory extends QueryFactory
34 {
35     private static final String JavaDoc RCSRevision = "$Revision: 1.5 $";
36     private static final String JavaDoc RCSName = "$Name: $";
37
38     protected TempTableIDGenerator _tmpTableIDProvider;
39     // NOTE: do not set to null since init is performed by super constructor
40
41     /**
42      * Execute the Xquery request and return an XML document as result.
43      *
44      * @param xquery the query to execute.
45      * @return the XML result document.
46      */
47
48     public SybaseQueryFactory(MetaDataManager metadataManager, MetadataAccess metadata)
49     throws XMLDBCException {
50         super(metadataManager, metadata);
51     }
52     
53     protected void createVisitors()
54     {
55         TypeInterpreter ti = new TypeInterpreter();
56         _genAlgebraVisitor = new GenAlgebraVisitor( ti,_metadataManager, _attIDProvider, _relIDProvider);
57
58         _algebraTypeVisitor = new AlgebraTypeVisitor();
59         _removeProjectVisitor = new RemoveIntermediateProjectVisitor();
60         _brav = new BuildReferredAttributes();
61         _apv = new AnalyzePredicateVisitor();
62
63         _tmpTableIDProvider = new TempTableIDGenerator();
64         _genSqlVisitor = new org.xquark.extractor.sybase.SybaseGenSqlVisitor(_relIDProvider, _tmpTableIDProvider);
65         _genSqlVisitor.setMetadataManager(_metadataManager);
66     }
67         
68     public Query.CompiledExpression compileQuery(XQueryExpression xExpr) throws XMLDBCException {
69         _tmpTableIDProvider.reset();
70         return super.compileQuery(xExpr);
71     }
72  }
73
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