Source Code Cross Referenced for DBQuery.java in  » RSS-RDF » Jena-2.5.5 » com » hp » hpl » jena » db » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » RSS RDF » Jena 2.5.5 » com.hp.hpl.jena.db.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:          (c) Copyright 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
003:          [See end of file]
004:          $Id: DBQuery.java,v 1.11 2008/01/02 12:08:24 andy_seaborne Exp $
005:         */
006:
007:        package com.hp.hpl.jena.db.impl;
008:
009:        import java.util.ArrayList;
010:        import java.util.List;
011:
012:        /**
013:         @author hedgehog
014:         */
015:
016:        public class DBQuery {
017:            int argCnt; // number of arguments to query
018:            String argType; // list of argument types
019:            List argIndex; // index of argument in input
020:            int varCnt; // number of variables in query
021:            int aliasCnt; // number of tables aliases (scans) in from clause
022:            String stmt; // query string
023:            VarDesc[] vars; // list of VarIndex, variables referenced in this query
024:            int[] resList; // indexes of result columns in mapping
025:            int graphId; // id of graph to query
026:            String table; // name of table to query
027:            IPSet pset; // pset to be queried
028:            IRDBDriver driver; // driver for store
029:            boolean qryOnlyStmt; // if true, ignore reified statements
030:            boolean qryOnlyReif; // if true, ignore asserted statements
031:            boolean qryFullReif; // if true, ignore partially reified statements
032:            DriverRDB.GenSQLAnd sqlAnd;
033:
034:            boolean isMultiModel; // true if graph is multi-model
035:            boolean isSingleValued; // true if property table is single-valued
036:            boolean isCacheable; // true if it is safe to cache compiled query
037:            boolean isReifier; // true if query is over a reifier specialized graph
038:            boolean isEmpty; // true if compiler determines query has no results
039:
040:            public DBQuery(SpecializedGraph sg, List varList,
041:                    boolean queryOnlyStmt, boolean queryOnlyReif,
042:                    boolean queryFullReif) {
043:
044:                argCnt = 0;
045:                argType = "";
046:                argIndex = new ArrayList();
047:                aliasCnt = 0;
048:                stmt = "";
049:                isMultiModel = true; // for now
050:                isSingleValued = false; // for now
051:                isCacheable = true;
052:                if (sg != null) {
053:                    pset = sg.getPSet();
054:                    isReifier = sg instanceof  SpecializedGraphReifier;
055:                    isEmpty = false;
056:                    graphId = sg.getGraphId();
057:                    table = pset.getTblName();
058:                    driver = pset.driver();
059:                } else {
060:                    pset = null;
061:                    isReifier = false;
062:                    isEmpty = true;
063:                    driver = null;
064:                }
065:                sqlAnd = new IRDBDriver.GenSQLAnd();
066:                qryOnlyStmt = queryOnlyStmt;
067:                qryOnlyReif = queryOnlyReif;
068:                qryFullReif = queryFullReif;
069:                // array of variable bound by query
070:                vars = new VarDesc[varList.size()];
071:                for (varCnt = 0; varCnt < varList.size(); varCnt++) {
072:                    vars[varCnt] = (VarDesc) varList.get(varCnt);
073:                }
074:
075:            }
076:
077:            public VarDesc getBinding(int i) {
078:                return vars[i];
079:            }
080:
081:            public VarDesc findBinding(String v) {
082:                int i;
083:                for (i = 0; i < vars.length; i++) {
084:                    if (vars[i].var.getName().equals(v))
085:                        return vars[i];
086:                }
087:                return null;
088:            }
089:
090:            public void newAlias() {
091:                aliasCnt++;
092:            }
093:
094:        }
095:
096:        /*
097:         (c) Copyright 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
098:         All rights reserved.
099:
100:         Redistribution and use in source and binary forms, with or without
101:         modification, are permitted provided that the following conditions
102:         are met:
103:
104:         1. Redistributions of source code must retain the above copyright
105:         notice, this list of conditions and the following disclaimer.
106:
107:         2. Redistributions in binary form must reproduce the above copyright
108:         notice, this list of conditions and the following disclaimer in the
109:         documentation and/or other materials provided with the distribution.
110:
111:         3. The name of the author may not be used to endorse or promote products
112:         derived from this software without specific prior written permission.
113:
114:         THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
115:         IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
116:         OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
117:         IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
118:         INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
119:         NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
120:         DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
121:         THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
122:         (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
123:         THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
124:         */
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