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/**
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203
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* '$RCSfile$'
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* Purpose: A Class that represents a structured query, and can be
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* constructed from an XML serialization conforming to
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* pathquery.dtd. The printSQL() method can be used to print
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* a SQL serialization of the query.
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Matt Jones
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349
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jones
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* Release: @release@
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155
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jones
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*
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203
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jones
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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669
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jones
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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155
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jones
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*/
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package edu.ucsb.nceas.metacat;
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899
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berkley
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import edu.ucsb.nceas.dbadapter.*;
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155
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jones
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import java.io.*;
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import java.util.Stack;
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158
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jones
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import java.util.Vector;
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159
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jones
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import java.util.Enumeration;
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155
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jones
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185
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jones
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import org.xml.sax.Attributes;
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158
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jones
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import org.xml.sax.InputSource;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXParseException;
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185
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jones
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import org.xml.sax.XMLReader;
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import org.xml.sax.helpers.XMLReaderFactory;
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import org.xml.sax.helpers.DefaultHandler;
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155
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jones
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402
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berkley
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/**
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172
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jones
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* A Class that represents a structured query, and can be
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* constructed from an XML serialization conforming to @see pathquery.dtd.
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* The printSQL() method can be used to print a SQL serialization of the query.
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155
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jones
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*/
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185
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jones
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public class QuerySpecification extends DefaultHandler {
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155
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jones
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745
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jones
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/** flag determining whether extended query terms are present */
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402
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berkley
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private boolean containsExtendedSQL=false;
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745
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jones
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/** Identifier for this query document */
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158
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jones
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private String meta_file_id;
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745
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jones
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/** Title of this query */
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private String queryTitle;
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/** List of document types to be returned using package back tracing */
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743
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jones
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private Vector returnDocList;
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745
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jones
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/** List of document types to be searched */
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743
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jones
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private Vector filterDocList;
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745
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jones
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/** List of fields to be returned in result set */
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402
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berkley
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private Vector returnFieldList;
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745
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jones
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/** List of users owning documents to be searched */
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535
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jones
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private Vector ownerList;
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745
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jones
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/** List of sites/scopes used to constrain search */
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535
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jones
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private Vector siteList;
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745
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jones
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/** The root query group that contains the recursive query constraints */
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158
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jones
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private QueryGroup query = null;
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745
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jones
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// Query data structures used temporarily during XML parsing
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158
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jones
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private Stack elementStack;
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private Stack queryStack;
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159
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jones
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private String currentValue;
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private String currentPathexpr;
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172
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jones
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private String parserName = null;
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535
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jones
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private String accNumberSeparator = null;
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899
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berkley
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private static final AbstractDatabase dbAdapter = MetaCatUtil.dbAdapter;
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158
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899
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berkley
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155
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jones
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/**
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* construct an instance of the QuerySpecification class
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*
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172
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jones
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* @param queryspec the XML representation of the query (should conform
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* to pathquery.dtd) as a Reader
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* @param parserName the fully qualified name of a Java Class implementing
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185
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jones
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* the org.xml.sax.XMLReader interface
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155
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jones
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*/
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535
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jones
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public QuerySpecification( Reader queryspec, String parserName,
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String accNumberSeparator ) throws IOException {
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jones
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super();
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berkley
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// Initialize the class variables
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returnDocList = new Vector();
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filterDocList = new Vector();
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158
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jones
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elementStack = new Stack();
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queryStack = new Stack();
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402
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berkley
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returnFieldList = new Vector();
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jones
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ownerList = new Vector();
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siteList = new Vector();
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jones
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this.parserName = parserName;
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535
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jones
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this.accNumberSeparator = accNumberSeparator;
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158
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jones
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// Initialize the parser and read the queryspec
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185
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jones
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XMLReader parser = initializeParser();
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181
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jones
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if (parser == null) {
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System.err.println("SAX parser not instantiated properly.");
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}
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155
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jones
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try {
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parser.parse(new InputSource(queryspec));
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} catch (SAXException e) {
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675
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berkley
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System.err.println("error parsing data in " +
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"QuerySpecification.QuerySpecification");
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jones
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System.err.println(e.getMessage());
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155
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jones
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}
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}
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/**
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* construct an instance of the QuerySpecification class
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*
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172
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jones
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* @param queryspec the XML representation of the query (should conform
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* to pathquery.dtd) as a String
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* @param parserName the fully qualified name of a Java Class implementing
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* the org.xml.sax.Parser interface
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155
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jones
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*/
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535
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jones
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public QuerySpecification( String queryspec, String parserName,
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String accNumberSeparator) throws IOException {
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this(new StringReader(queryspec), parserName, accNumberSeparator);
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155
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jones
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}
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133 |
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/** Main routine for testing */
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static public void main(String[] args) {
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if (args.length < 1) {
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System.err.println("Wrong number of arguments!!!");
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System.err.println("USAGE: java QuerySpecification <xmlfile>");
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return;
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} else {
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711
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jones
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int i = 0;
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boolean useXMLIndex = true;
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if ( args[i].equals( "-noindex" ) ) {
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useXMLIndex = false;
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i++;
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}
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String xmlfile = args[i];
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155
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jones
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try {
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203
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jones
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MetaCatUtil util = new MetaCatUtil();
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152 |
155
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jones
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FileReader xml = new FileReader(new File(xmlfile));
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153 |
203
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jones
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QuerySpecification qspec =
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154 |
535
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jones
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new QuerySpecification(xml, util.getOption("saxparser"),
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util.getOption("accNumberSeparator"));
|
156 |
706
|
bojilova
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System.out.println(qspec.printSQL(useXMLIndex));
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181
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jones
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158 |
155
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jones
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} catch (IOException e) {
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System.err.println(e.getMessage());
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}
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161 |
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162 |
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}
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163 |
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}
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164 |
402
|
berkley
|
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165 |
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/**
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166 |
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* Returns true if the parsed query contains and extended xml query
|
167 |
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* (i.e. there is at least one <returnfield> in the pathquery document)
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168 |
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*/
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169 |
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public boolean containsExtendedSQL()
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{
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if(containsExtendedSQL)
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{
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173 |
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return true;
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174 |
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}
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175 |
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else
|
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{
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177 |
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return false;
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178 |
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}
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179 |
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}
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180 |
|
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181 |
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/**
|
182 |
745
|
jones
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* Accessor method to return the identifier of this Query
|
183 |
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*/
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184 |
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public String getIdentifier()
|
185 |
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{
|
186 |
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return meta_file_id;
|
187 |
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}
|
188 |
|
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|
189 |
|
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/**
|
190 |
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* method to set the identifier of this query
|
191 |
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|
*/
|
192 |
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public void setIdentifier(String id) {
|
193 |
|
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this.meta_file_id = id;
|
194 |
|
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}
|
195 |
|
|
|
196 |
|
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/**
|
197 |
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* Accessor method to return the title of this Query
|
198 |
|
|
*/
|
199 |
|
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public String getQueryTitle()
|
200 |
|
|
{
|
201 |
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|
return queryTitle;
|
202 |
|
|
}
|
203 |
|
|
|
204 |
|
|
/**
|
205 |
|
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* method to set the title of this query
|
206 |
|
|
*/
|
207 |
|
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public void setQueryTitle(String title)
|
208 |
|
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{
|
209 |
|
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this.queryTitle = title;
|
210 |
|
|
}
|
211 |
|
|
|
212 |
|
|
/**
|
213 |
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|
* Accessor method to return a vector of the return document types as
|
214 |
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* defined in the <returndoctype> tag in the pathquery dtd.
|
215 |
|
|
*/
|
216 |
|
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public Vector getReturnDocList()
|
217 |
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|
{
|
218 |
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|
return this.returnDocList;
|
219 |
|
|
}
|
220 |
|
|
|
221 |
|
|
/**
|
222 |
|
|
* method to set the list of return docs of this query
|
223 |
|
|
*/
|
224 |
|
|
public void setReturnDocList(Vector returnDocList)
|
225 |
|
|
{
|
226 |
|
|
this.returnDocList = returnDocList;
|
227 |
|
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}
|
228 |
|
|
|
229 |
|
|
/**
|
230 |
|
|
* Accessor method to return a vector of the filter doc types as
|
231 |
|
|
* defined in the <filterdoctype> tag in the pathquery dtd.
|
232 |
|
|
*/
|
233 |
|
|
public Vector getFilterDocList()
|
234 |
|
|
{
|
235 |
|
|
return this.filterDocList;
|
236 |
|
|
}
|
237 |
|
|
|
238 |
|
|
/**
|
239 |
|
|
* method to set the list of filter docs of this query
|
240 |
|
|
*/
|
241 |
|
|
public void setFilterDocList(Vector filterDocList)
|
242 |
|
|
{
|
243 |
|
|
this.filterDocList = filterDocList;
|
244 |
|
|
}
|
245 |
|
|
|
246 |
|
|
/**
|
247 |
402
|
berkley
|
* Accessor method to return a vector of the extended return fields as
|
248 |
|
|
* defined in the <returnfield> tag in the pathquery dtd.
|
249 |
|
|
*/
|
250 |
|
|
public Vector getReturnFieldList()
|
251 |
|
|
{
|
252 |
|
|
return this.returnFieldList;
|
253 |
|
|
}
|
254 |
155
|
jones
|
|
255 |
172
|
jones
|
/**
|
256 |
745
|
jones
|
* method to set the list of fields to be returned by this query
|
257 |
|
|
*/
|
258 |
|
|
public void setReturnFieldList(Vector returnFieldList)
|
259 |
|
|
{
|
260 |
|
|
this.returnFieldList = returnFieldList;
|
261 |
|
|
}
|
262 |
|
|
|
263 |
|
|
/**
|
264 |
|
|
* Accessor method to return a vector of the owner fields as
|
265 |
|
|
* defined in the <owner> tag in the pathquery dtd.
|
266 |
|
|
*/
|
267 |
|
|
public Vector getOwnerList()
|
268 |
|
|
{
|
269 |
|
|
return this.ownerList;
|
270 |
|
|
}
|
271 |
|
|
|
272 |
|
|
/**
|
273 |
|
|
* method to set the list of owners used to constrain this query
|
274 |
|
|
*/
|
275 |
|
|
public void setOwnerList(Vector ownerList)
|
276 |
|
|
{
|
277 |
|
|
this.ownerList = ownerList;
|
278 |
|
|
}
|
279 |
|
|
|
280 |
|
|
/**
|
281 |
|
|
* Accessor method to return a vector of the site fields as
|
282 |
|
|
* defined in the <site> tag in the pathquery dtd.
|
283 |
|
|
*/
|
284 |
|
|
public Vector getSiteList()
|
285 |
|
|
{
|
286 |
|
|
return this.siteList;
|
287 |
|
|
}
|
288 |
|
|
|
289 |
|
|
/**
|
290 |
|
|
* method to set the list of sites used to constrain this query
|
291 |
|
|
*/
|
292 |
|
|
public void setSiteList(Vector siteList)
|
293 |
|
|
{
|
294 |
|
|
this.siteList = siteList;
|
295 |
|
|
}
|
296 |
|
|
|
297 |
|
|
/**
|
298 |
|
|
* get the QueryGroup used to express query constraints
|
299 |
|
|
*/
|
300 |
|
|
public QueryGroup getQueryGroup()
|
301 |
|
|
{
|
302 |
|
|
return query;
|
303 |
|
|
}
|
304 |
|
|
|
305 |
|
|
/**
|
306 |
172
|
jones
|
* Set up the SAX parser for reading the XML serialized query
|
307 |
|
|
*/
|
308 |
185
|
jones
|
private XMLReader initializeParser() {
|
309 |
|
|
XMLReader parser = null;
|
310 |
172
|
jones
|
|
311 |
155
|
jones
|
// Set up the SAX document handlers for parsing
|
312 |
|
|
try {
|
313 |
|
|
|
314 |
|
|
// Get an instance of the parser
|
315 |
185
|
jones
|
parser = XMLReaderFactory.createXMLReader(parserName);
|
316 |
155
|
jones
|
|
317 |
185
|
jones
|
// Set the ContentHandler to this instance
|
318 |
|
|
parser.setContentHandler(this);
|
319 |
155
|
jones
|
|
320 |
185
|
jones
|
// Set the error Handler to this instance
|
321 |
158
|
jones
|
parser.setErrorHandler(this);
|
322 |
155
|
jones
|
|
323 |
|
|
} catch (Exception e) {
|
324 |
675
|
berkley
|
System.err.println("Error in QuerySpcecification.initializeParser " +
|
325 |
|
|
e.toString());
|
326 |
155
|
jones
|
}
|
327 |
|
|
|
328 |
|
|
return parser;
|
329 |
|
|
}
|
330 |
|
|
|
331 |
172
|
jones
|
/**
|
332 |
|
|
* callback method used by the SAX Parser when the start tag of an
|
333 |
|
|
* element is detected. Used in this context to parse and store
|
334 |
|
|
* the query information in class variables.
|
335 |
|
|
*/
|
336 |
185
|
jones
|
public void startElement (String uri, String localName,
|
337 |
|
|
String qName, Attributes atts)
|
338 |
155
|
jones
|
throws SAXException {
|
339 |
185
|
jones
|
BasicNode currentNode = new BasicNode(localName);
|
340 |
159
|
jones
|
// add attributes to BasicNode here
|
341 |
|
|
if (atts != null) {
|
342 |
|
|
int len = atts.getLength();
|
343 |
|
|
for (int i = 0; i < len; i++) {
|
344 |
185
|
jones
|
currentNode.setAttribute(atts.getLocalName(i), atts.getValue(i));
|
345 |
159
|
jones
|
}
|
346 |
|
|
}
|
347 |
|
|
|
348 |
158
|
jones
|
elementStack.push(currentNode);
|
349 |
159
|
jones
|
if (currentNode.getTagName().equals("querygroup")) {
|
350 |
158
|
jones
|
QueryGroup currentGroup = new QueryGroup(
|
351 |
178
|
jones
|
currentNode.getAttribute("operator"));
|
352 |
158
|
jones
|
if (query == null) {
|
353 |
|
|
query = currentGroup;
|
354 |
159
|
jones
|
} else {
|
355 |
|
|
QueryGroup parentGroup = (QueryGroup)queryStack.peek();
|
356 |
|
|
parentGroup.addChild(currentGroup);
|
357 |
158
|
jones
|
}
|
358 |
159
|
jones
|
queryStack.push(currentGroup);
|
359 |
158
|
jones
|
}
|
360 |
155
|
jones
|
}
|
361 |
|
|
|
362 |
172
|
jones
|
/**
|
363 |
|
|
* callback method used by the SAX Parser when the end tag of an
|
364 |
|
|
* element is detected. Used in this context to parse and store
|
365 |
|
|
* the query information in class variables.
|
366 |
|
|
*/
|
367 |
185
|
jones
|
public void endElement (String uri, String localName,
|
368 |
|
|
String qName) throws SAXException {
|
369 |
158
|
jones
|
BasicNode leaving = (BasicNode)elementStack.pop();
|
370 |
159
|
jones
|
if (leaving.getTagName().equals("queryterm")) {
|
371 |
|
|
boolean isCaseSensitive = (new Boolean(
|
372 |
|
|
leaving.getAttribute("casesensitive"))).booleanValue();
|
373 |
|
|
QueryTerm currentTerm = null;
|
374 |
|
|
if (currentPathexpr == null) {
|
375 |
|
|
currentTerm = new QueryTerm(isCaseSensitive,
|
376 |
|
|
leaving.getAttribute("searchmode"),currentValue);
|
377 |
|
|
} else {
|
378 |
|
|
currentTerm = new QueryTerm(isCaseSensitive,
|
379 |
|
|
leaving.getAttribute("searchmode"),currentValue,
|
380 |
|
|
currentPathexpr);
|
381 |
|
|
}
|
382 |
|
|
QueryGroup currentGroup = (QueryGroup)queryStack.peek();
|
383 |
|
|
currentGroup.addChild(currentTerm);
|
384 |
|
|
currentValue = null;
|
385 |
|
|
currentPathexpr = null;
|
386 |
|
|
} else if (leaving.getTagName().equals("querygroup")) {
|
387 |
|
|
QueryGroup leavingGroup = (QueryGroup)queryStack.pop();
|
388 |
158
|
jones
|
}
|
389 |
155
|
jones
|
}
|
390 |
158
|
jones
|
|
391 |
172
|
jones
|
/**
|
392 |
|
|
* callback method used by the SAX Parser when the text sequences of an
|
393 |
|
|
* xml stream are detected. Used in this context to parse and store
|
394 |
|
|
* the query information in class variables.
|
395 |
|
|
*/
|
396 |
158
|
jones
|
public void characters(char ch[], int start, int length) {
|
397 |
|
|
|
398 |
|
|
String inputString = new String(ch, start, length);
|
399 |
|
|
BasicNode currentNode = (BasicNode)elementStack.peek();
|
400 |
|
|
String currentTag = currentNode.getTagName();
|
401 |
|
|
if (currentTag.equals("meta_file_id")) {
|
402 |
|
|
meta_file_id = inputString;
|
403 |
745
|
jones
|
} else if (currentTag.equals("querytitle")) {
|
404 |
|
|
queryTitle = inputString;
|
405 |
159
|
jones
|
} else if (currentTag.equals("value")) {
|
406 |
|
|
currentValue = inputString;
|
407 |
|
|
} else if (currentTag.equals("pathexpr")) {
|
408 |
|
|
currentPathexpr = inputString;
|
409 |
172
|
jones
|
} else if (currentTag.equals("returndoctype")) {
|
410 |
743
|
jones
|
returnDocList.add(inputString);
|
411 |
745
|
jones
|
} else if (currentTag.equals("filterdoctype")) {
|
412 |
|
|
filterDocList.add(inputString);
|
413 |
402
|
berkley
|
} else if (currentTag.equals("returnfield")) {
|
414 |
|
|
returnFieldList.add(inputString);
|
415 |
|
|
containsExtendedSQL = true;
|
416 |
743
|
jones
|
} else if (currentTag.equals("filterdoctype")) {
|
417 |
|
|
filterDocList.add(inputString);
|
418 |
535
|
jones
|
} else if (currentTag.equals("owner")) {
|
419 |
|
|
ownerList.add(inputString);
|
420 |
|
|
} else if (currentTag.equals("site")) {
|
421 |
|
|
siteList.add(inputString);
|
422 |
158
|
jones
|
}
|
423 |
|
|
}
|
424 |
|
|
|
425 |
172
|
jones
|
/**
|
426 |
|
|
* create a SQL serialization of the query that this instance represents
|
427 |
|
|
*/
|
428 |
706
|
bojilova
|
public String printSQL(boolean useXMLIndex) {
|
429 |
170
|
jones
|
StringBuffer self = new StringBuffer();
|
430 |
|
|
|
431 |
692
|
bojilova
|
self.append("SELECT docid,docname,doctype,");
|
432 |
626
|
berkley
|
self.append("date_created, date_updated, rev ");
|
433 |
172
|
jones
|
self.append("FROM xml_documents WHERE docid IN (");
|
434 |
170
|
jones
|
|
435 |
178
|
jones
|
// This determines the documents that meet the query conditions
|
436 |
706
|
bojilova
|
self.append(query.printSQL(useXMLIndex));
|
437 |
172
|
jones
|
|
438 |
|
|
self.append(") ");
|
439 |
402
|
berkley
|
|
440 |
172
|
jones
|
// Add SQL to filter for doctypes requested in the query
|
441 |
743
|
jones
|
// This is an implicit OR for the list of doctypes. Only doctypes in this
|
442 |
|
|
// list will be searched if the tag is present
|
443 |
|
|
if (!filterDocList.isEmpty()) {
|
444 |
172
|
jones
|
boolean firstdoctype = true;
|
445 |
|
|
self.append(" AND (");
|
446 |
743
|
jones
|
Enumeration en = filterDocList.elements();
|
447 |
172
|
jones
|
while (en.hasMoreElements()) {
|
448 |
|
|
String currentDoctype = (String)en.nextElement();
|
449 |
|
|
if (firstdoctype) {
|
450 |
402
|
berkley
|
firstdoctype = false;
|
451 |
|
|
self.append(" doctype = '" + currentDoctype + "'");
|
452 |
172
|
jones
|
} else {
|
453 |
|
|
self.append(" OR doctype = '" + currentDoctype + "'");
|
454 |
|
|
}
|
455 |
|
|
}
|
456 |
|
|
self.append(") ");
|
457 |
|
|
}
|
458 |
743
|
jones
|
|
459 |
535
|
jones
|
// Add SQL to filter for owners requested in the query
|
460 |
|
|
// This is an implicit OR for the list of owners
|
461 |
|
|
if (!ownerList.isEmpty()) {
|
462 |
|
|
boolean first = true;
|
463 |
|
|
self.append(" AND (");
|
464 |
|
|
Enumeration en = ownerList.elements();
|
465 |
|
|
while (en.hasMoreElements()) {
|
466 |
|
|
String current = (String)en.nextElement();
|
467 |
|
|
if (first) {
|
468 |
|
|
first = false;
|
469 |
|
|
self.append(" user_owner = '" + current + "'");
|
470 |
|
|
} else {
|
471 |
|
|
self.append(" OR user_owner = '" + current + "'");
|
472 |
|
|
}
|
473 |
|
|
}
|
474 |
|
|
self.append(") ");
|
475 |
|
|
}
|
476 |
|
|
|
477 |
|
|
// Add SQL to filter for sites requested in the query
|
478 |
|
|
// This is an implicit OR for the list of sites
|
479 |
|
|
if (!siteList.isEmpty()) {
|
480 |
|
|
boolean first = true;
|
481 |
|
|
self.append(" AND (");
|
482 |
|
|
Enumeration en = siteList.elements();
|
483 |
|
|
while (en.hasMoreElements()) {
|
484 |
|
|
String current = (String)en.nextElement();
|
485 |
|
|
if (first) {
|
486 |
|
|
first = false;
|
487 |
|
|
self.append(" SUBSTR(docid, 1, INSTR(docid, '" +
|
488 |
|
|
accNumberSeparator + "')-1) = '" + current + "'");
|
489 |
|
|
} else {
|
490 |
|
|
self.append(" OR SUBSTR(docid, 1, INSTR(docid, '" +
|
491 |
|
|
accNumberSeparator + "')-1) = '" + current + "'");
|
492 |
|
|
}
|
493 |
|
|
}
|
494 |
|
|
self.append(") ");
|
495 |
|
|
}
|
496 |
710
|
berkley
|
//System.out.println(self.toString());
|
497 |
170
|
jones
|
return self.toString();
|
498 |
|
|
}
|
499 |
402
|
berkley
|
|
500 |
|
|
/**
|
501 |
|
|
* This method prints sql based upon the <returnfield> tag in the
|
502 |
|
|
* pathquery document. This allows for customization of the
|
503 |
|
|
* returned fields
|
504 |
465
|
berkley
|
* @param doclist the list of document ids to search by
|
505 |
402
|
berkley
|
*/
|
506 |
465
|
berkley
|
public String printExtendedSQL(String doclist)
|
507 |
402
|
berkley
|
{
|
508 |
|
|
StringBuffer self = new StringBuffer();
|
509 |
423
|
berkley
|
self.append("select xml_nodes.docid, xml_index.path, xml_nodes.nodedata ");
|
510 |
|
|
self.append("from xml_index, xml_nodes where xml_index.nodeid=");
|
511 |
|
|
self.append("xml_nodes.parentnodeid and (xml_index.path like '");
|
512 |
402
|
berkley
|
boolean firstfield = true;
|
513 |
|
|
//put the returnfields into the query
|
514 |
|
|
//the for loop allows for multiple fields
|
515 |
|
|
for(int i=0; i<returnFieldList.size(); i++)
|
516 |
|
|
{
|
517 |
|
|
if(firstfield)
|
518 |
|
|
{
|
519 |
|
|
firstfield = false;
|
520 |
405
|
berkley
|
self.append((String)returnFieldList.elementAt(i));
|
521 |
402
|
berkley
|
self.append("' ");
|
522 |
|
|
}
|
523 |
|
|
else
|
524 |
|
|
{
|
525 |
423
|
berkley
|
self.append("or xml_index.path like '");
|
526 |
405
|
berkley
|
self.append((String)returnFieldList.elementAt(i));
|
527 |
402
|
berkley
|
self.append("' ");
|
528 |
|
|
}
|
529 |
|
|
}
|
530 |
423
|
berkley
|
self.append(") AND xml_nodes.docid in (");
|
531 |
465
|
berkley
|
//self.append(query.printSQL());
|
532 |
|
|
self.append(doclist);
|
533 |
402
|
berkley
|
self.append(")");
|
534 |
423
|
berkley
|
self.append(" AND xml_nodes.nodetype = 'TEXT'");
|
535 |
405
|
berkley
|
|
536 |
423
|
berkley
|
//System.out.println(self.toString());
|
537 |
402
|
berkley
|
return self.toString();
|
538 |
|
|
}
|
539 |
465
|
berkley
|
|
540 |
|
|
public static String printRelationSQL(String docid)
|
541 |
|
|
{
|
542 |
|
|
StringBuffer self = new StringBuffer();
|
543 |
489
|
berkley
|
self.append("select subject, relationship, object, subdoctype, ");
|
544 |
|
|
self.append("objdoctype from xml_relation ");
|
545 |
743
|
jones
|
self.append("where docid like '").append(docid).append("'");
|
546 |
465
|
berkley
|
return self.toString();
|
547 |
|
|
}
|
548 |
453
|
berkley
|
|
549 |
172
|
jones
|
/**
|
550 |
465
|
berkley
|
* Prints sql that returns all relations in the database.
|
551 |
453
|
berkley
|
*/
|
552 |
|
|
public static String printPackageSQL()
|
553 |
|
|
{
|
554 |
|
|
StringBuffer self = new StringBuffer();
|
555 |
|
|
self.append("select z.nodedata, x.nodedata, y.nodedata from ");
|
556 |
|
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
557 |
743
|
jones
|
self.append("'triple/subject') s, (select nodeid, parentnodeid ");
|
558 |
453
|
berkley
|
self.append("from xml_index where path like ");
|
559 |
743
|
jones
|
self.append("'triple/relationship') rel, ");
|
560 |
453
|
berkley
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
561 |
743
|
jones
|
self.append("'triple/object') o, ");
|
562 |
453
|
berkley
|
self.append("xml_nodes x, xml_nodes y, xml_nodes z ");
|
563 |
|
|
self.append("where s.parentnodeid = rel.parentnodeid ");
|
564 |
|
|
self.append("and rel.parentnodeid = o.parentnodeid ");
|
565 |
899
|
berkley
|
self.append("and x.parentnodeid in (rel.nodeid) ");
|
566 |
|
|
self.append("and y.parentnodeid in (o.nodeid) ");
|
567 |
|
|
self.append("and z.parentnodeid in (s.nodeid) ");
|
568 |
453
|
berkley
|
//self.append("and z.nodedata like '%");
|
569 |
|
|
//self.append(docid);
|
570 |
|
|
//self.append("%'");
|
571 |
|
|
return self.toString();
|
572 |
|
|
}
|
573 |
|
|
|
574 |
|
|
/**
|
575 |
465
|
berkley
|
* Prints sql that returns all relations in the database that were input
|
576 |
|
|
* under a specific docid
|
577 |
|
|
* @param docid the docid to search for.
|
578 |
|
|
*/
|
579 |
|
|
public static String printPackageSQL(String docid)
|
580 |
|
|
{
|
581 |
|
|
StringBuffer self = new StringBuffer();
|
582 |
|
|
self.append("select z.nodedata, x.nodedata, y.nodedata from ");
|
583 |
|
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
584 |
743
|
jones
|
self.append("'triple/subject') s, (select nodeid, parentnodeid ");
|
585 |
465
|
berkley
|
self.append("from xml_index where path like ");
|
586 |
743
|
jones
|
self.append("'triple/relationship') rel, ");
|
587 |
465
|
berkley
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
588 |
743
|
jones
|
self.append("'triple/object') o, ");
|
589 |
465
|
berkley
|
self.append("xml_nodes x, xml_nodes y, xml_nodes z ");
|
590 |
|
|
self.append("where s.parentnodeid = rel.parentnodeid ");
|
591 |
|
|
self.append("and rel.parentnodeid = o.parentnodeid ");
|
592 |
899
|
berkley
|
self.append("and x.parentnodeid in (rel.nodeid) ");
|
593 |
|
|
self.append("and y.parentnodeid in (o.nodeid) ");
|
594 |
|
|
self.append("and z.parentnodeid in (s.nodeid) ");
|
595 |
465
|
berkley
|
self.append("and z.docid like '").append(docid).append("'");
|
596 |
|
|
|
597 |
|
|
return self.toString();
|
598 |
|
|
}
|
599 |
|
|
|
600 |
|
|
/**
|
601 |
|
|
* Returns all of the relations that has a certain docid in the subject
|
602 |
|
|
* or the object.
|
603 |
|
|
*
|
604 |
|
|
* @param docid the docid to search for
|
605 |
|
|
*/
|
606 |
|
|
public static String printPackageSQL(String subDocidURL, String objDocidURL)
|
607 |
|
|
{
|
608 |
|
|
StringBuffer self = new StringBuffer();
|
609 |
|
|
self.append("select z.nodedata, x.nodedata, y.nodedata from ");
|
610 |
|
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
611 |
743
|
jones
|
self.append("'triple/subject') s, (select nodeid, parentnodeid ");
|
612 |
465
|
berkley
|
self.append("from xml_index where path like ");
|
613 |
743
|
jones
|
self.append("'triple/relationship') rel, ");
|
614 |
465
|
berkley
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
615 |
743
|
jones
|
self.append("'triple/object') o, ");
|
616 |
465
|
berkley
|
self.append("xml_nodes x, xml_nodes y, xml_nodes z ");
|
617 |
|
|
self.append("where s.parentnodeid = rel.parentnodeid ");
|
618 |
|
|
self.append("and rel.parentnodeid = o.parentnodeid ");
|
619 |
899
|
berkley
|
self.append("and x.parentnodeid in (rel.nodeid) ");
|
620 |
|
|
self.append("and y.parentnodeid in (o.nodeid) ");
|
621 |
|
|
self.append("and z.parentnodeid in (s.nodeid) ");
|
622 |
465
|
berkley
|
self.append("and (z.nodedata like '");
|
623 |
|
|
self.append(subDocidURL);
|
624 |
|
|
self.append("' or y.nodedata like '");
|
625 |
|
|
self.append(objDocidURL);
|
626 |
|
|
self.append("')");
|
627 |
|
|
return self.toString();
|
628 |
|
|
}
|
629 |
|
|
|
630 |
|
|
public static String printGetDocByDoctypeSQL(String docid)
|
631 |
|
|
{
|
632 |
|
|
StringBuffer self = new StringBuffer();
|
633 |
|
|
|
634 |
692
|
bojilova
|
self.append("SELECT docid,docname,doctype,");
|
635 |
465
|
berkley
|
self.append("date_created, date_updated ");
|
636 |
|
|
self.append("FROM xml_documents WHERE docid IN (");
|
637 |
|
|
self.append(docid).append(")");
|
638 |
|
|
return self.toString();
|
639 |
|
|
}
|
640 |
|
|
|
641 |
|
|
/**
|
642 |
172
|
jones
|
* create a String description of the query that this instance represents.
|
643 |
|
|
* This should become a way to get the XML serialization of the query.
|
644 |
|
|
*/
|
645 |
159
|
jones
|
public String toString() {
|
646 |
692
|
bojilova
|
return "meta_file_id=" + meta_file_id + "\n" + query;
|
647 |
|
|
//DOCTITLE attr cleared from the db
|
648 |
|
|
// return "meta_file_id=" + meta_file_id + "\n" +
|
649 |
|
|
// "querytitle=" + querytitle + "\n" + query;
|
650 |
159
|
jones
|
}
|
651 |
|
|
|
652 |
158
|
jones
|
/** a utility class that represents a group of terms in a query */
|
653 |
|
|
private class QueryGroup {
|
654 |
178
|
jones
|
private String operator = null; // indicates how query terms are combined
|
655 |
|
|
private Vector children = null; // the list of query terms and groups
|
656 |
158
|
jones
|
|
657 |
172
|
jones
|
/**
|
658 |
|
|
* construct a new QueryGroup
|
659 |
|
|
*
|
660 |
178
|
jones
|
* @param operator the boolean conector used to connect query terms
|
661 |
172
|
jones
|
* in this query group
|
662 |
|
|
*/
|
663 |
178
|
jones
|
public QueryGroup(String operator) {
|
664 |
|
|
this.operator = operator;
|
665 |
158
|
jones
|
children = new Vector();
|
666 |
|
|
}
|
667 |
|
|
|
668 |
172
|
jones
|
/**
|
669 |
|
|
* Add a child QueryGroup to this QueryGroup
|
670 |
|
|
*
|
671 |
|
|
* @param qgroup the query group to be added to the list of terms
|
672 |
|
|
*/
|
673 |
158
|
jones
|
public void addChild(QueryGroup qgroup) {
|
674 |
|
|
children.add((Object)qgroup);
|
675 |
|
|
}
|
676 |
|
|
|
677 |
172
|
jones
|
/**
|
678 |
|
|
* Add a child QueryTerm to this QueryGroup
|
679 |
|
|
*
|
680 |
|
|
* @param qterm the query term to be added to the list of terms
|
681 |
|
|
*/
|
682 |
158
|
jones
|
public void addChild(QueryTerm qterm) {
|
683 |
|
|
children.add((Object)qterm);
|
684 |
|
|
}
|
685 |
|
|
|
686 |
172
|
jones
|
/**
|
687 |
|
|
* Retrieve an Enumeration of query terms for this QueryGroup
|
688 |
|
|
*/
|
689 |
158
|
jones
|
public Enumeration getChildren() {
|
690 |
|
|
return children.elements();
|
691 |
|
|
}
|
692 |
159
|
jones
|
|
693 |
172
|
jones
|
/**
|
694 |
|
|
* create a SQL serialization of the query that this instance represents
|
695 |
|
|
*/
|
696 |
706
|
bojilova
|
public String printSQL(boolean useXMLIndex) {
|
697 |
170
|
jones
|
StringBuffer self = new StringBuffer();
|
698 |
|
|
boolean first = true;
|
699 |
|
|
|
700 |
|
|
self.append("(");
|
701 |
|
|
|
702 |
|
|
Enumeration en= getChildren();
|
703 |
|
|
while (en.hasMoreElements()) {
|
704 |
|
|
Object qobject = en.nextElement();
|
705 |
|
|
if (first) {
|
706 |
|
|
first = false;
|
707 |
|
|
} else {
|
708 |
178
|
jones
|
self.append(" " + operator + " ");
|
709 |
170
|
jones
|
}
|
710 |
|
|
if (qobject instanceof QueryGroup) {
|
711 |
|
|
QueryGroup qg = (QueryGroup)qobject;
|
712 |
706
|
bojilova
|
self.append(qg.printSQL(useXMLIndex));
|
713 |
170
|
jones
|
} else if (qobject instanceof QueryTerm) {
|
714 |
|
|
QueryTerm qt = (QueryTerm)qobject;
|
715 |
706
|
bojilova
|
self.append(qt.printSQL(useXMLIndex));
|
716 |
170
|
jones
|
} else {
|
717 |
|
|
System.err.println("qobject wrong type: fatal error");
|
718 |
|
|
}
|
719 |
|
|
}
|
720 |
|
|
self.append(") \n");
|
721 |
|
|
return self.toString();
|
722 |
|
|
}
|
723 |
|
|
|
724 |
172
|
jones
|
/**
|
725 |
|
|
* create a String description of the query that this instance represents.
|
726 |
|
|
* This should become a way to get the XML serialization of the query.
|
727 |
|
|
*/
|
728 |
159
|
jones
|
public String toString() {
|
729 |
|
|
StringBuffer self = new StringBuffer();
|
730 |
|
|
|
731 |
178
|
jones
|
self.append(" (Query group operator=" + operator + "\n");
|
732 |
159
|
jones
|
Enumeration en= getChildren();
|
733 |
|
|
while (en.hasMoreElements()) {
|
734 |
|
|
Object qobject = en.nextElement();
|
735 |
|
|
self.append(qobject);
|
736 |
|
|
}
|
737 |
|
|
self.append(" )\n");
|
738 |
|
|
return self.toString();
|
739 |
|
|
}
|
740 |
158
|
jones
|
}
|
741 |
|
|
|
742 |
|
|
/** a utility class that represents a single term in a query */
|
743 |
|
|
private class QueryTerm {
|
744 |
|
|
private boolean casesensitive = false;
|
745 |
|
|
private String searchmode = null;
|
746 |
|
|
private String value = null;
|
747 |
|
|
private String pathexpr = null;
|
748 |
|
|
|
749 |
172
|
jones
|
/**
|
750 |
|
|
* Construct a new instance of a query term for a free text search
|
751 |
|
|
* (using the value only)
|
752 |
|
|
*
|
753 |
|
|
* @param casesensitive flag indicating whether case is used to match
|
754 |
|
|
* @param searchmode determines what kind of substring match is performed
|
755 |
|
|
* (one of starts-with|ends-with|contains|matches-exactly)
|
756 |
|
|
* @param value the text value to match
|
757 |
|
|
*/
|
758 |
158
|
jones
|
public QueryTerm(boolean casesensitive, String searchmode,
|
759 |
|
|
String value) {
|
760 |
|
|
this.casesensitive = casesensitive;
|
761 |
|
|
this.searchmode = searchmode;
|
762 |
|
|
this.value = value;
|
763 |
|
|
}
|
764 |
|
|
|
765 |
172
|
jones
|
/**
|
766 |
|
|
* Construct a new instance of a query term for a structured search
|
767 |
|
|
* (matching the value only for those nodes in the pathexpr)
|
768 |
|
|
*
|
769 |
|
|
* @param casesensitive flag indicating whether case is used to match
|
770 |
|
|
* @param searchmode determines what kind of substring match is performed
|
771 |
|
|
* (one of starts-with|ends-with|contains|matches-exactly)
|
772 |
|
|
* @param value the text value to match
|
773 |
|
|
* @param pathexpr the hierarchical path to the nodes to be searched
|
774 |
|
|
*/
|
775 |
158
|
jones
|
public QueryTerm(boolean casesensitive, String searchmode,
|
776 |
|
|
String value, String pathexpr) {
|
777 |
|
|
this(casesensitive, searchmode, value);
|
778 |
|
|
this.pathexpr = pathexpr;
|
779 |
|
|
}
|
780 |
|
|
|
781 |
172
|
jones
|
/** determine if the QueryTerm is case sensitive */
|
782 |
158
|
jones
|
public boolean isCaseSensitive() {
|
783 |
|
|
return casesensitive;
|
784 |
|
|
}
|
785 |
|
|
|
786 |
172
|
jones
|
/** get the searchmode parameter */
|
787 |
158
|
jones
|
public String getSearchMode() {
|
788 |
|
|
return searchmode;
|
789 |
|
|
}
|
790 |
|
|
|
791 |
172
|
jones
|
/** get the Value parameter */
|
792 |
158
|
jones
|
public String getValue() {
|
793 |
|
|
return value;
|
794 |
|
|
}
|
795 |
|
|
|
796 |
172
|
jones
|
/** get the path expression parameter */
|
797 |
158
|
jones
|
public String getPathExpression() {
|
798 |
|
|
return pathexpr;
|
799 |
|
|
}
|
800 |
159
|
jones
|
|
801 |
172
|
jones
|
/**
|
802 |
|
|
* create a SQL serialization of the query that this instance represents
|
803 |
|
|
*/
|
804 |
706
|
bojilova
|
public String printSQL(boolean useXMLIndex) {
|
805 |
170
|
jones
|
StringBuffer self = new StringBuffer();
|
806 |
|
|
|
807 |
|
|
// Uppercase the search string if case match is not important
|
808 |
|
|
String casevalue = null;
|
809 |
|
|
String nodedataterm = null;
|
810 |
|
|
|
811 |
|
|
if (casesensitive) {
|
812 |
|
|
nodedataterm = "nodedata";
|
813 |
|
|
casevalue = value;
|
814 |
|
|
} else {
|
815 |
|
|
nodedataterm = "UPPER(nodedata)";
|
816 |
|
|
casevalue = value.toUpperCase();
|
817 |
|
|
}
|
818 |
|
|
|
819 |
|
|
// Add appropriate wildcards to search string
|
820 |
795
|
bojilova
|
//String searchvalue = null;
|
821 |
|
|
String searchexpr = null;
|
822 |
170
|
jones
|
if (searchmode.equals("starts-with")) {
|
823 |
795
|
bojilova
|
//searchvalue = casevalue + "%";
|
824 |
|
|
searchexpr = nodedataterm + " LIKE '" + casevalue + "%' ";
|
825 |
170
|
jones
|
} else if (searchmode.equals("ends-with")) {
|
826 |
795
|
bojilova
|
//searchvalue = "%" + casevalue;
|
827 |
|
|
searchexpr = nodedataterm + " LIKE '%" + casevalue + "' ";
|
828 |
170
|
jones
|
} else if (searchmode.equals("contains")) {
|
829 |
795
|
bojilova
|
//searchvalue = "%" + casevalue + "%";
|
830 |
|
|
searchexpr = nodedataterm + " LIKE '%" + casevalue + "%' ";
|
831 |
|
|
} else if (searchmode.equals("equals")) {
|
832 |
|
|
//searchvalue = casevalue;
|
833 |
|
|
searchexpr = nodedataterm + " = '" + casevalue + "' ";
|
834 |
|
|
} else if (searchmode.equals("isnot-equal")) {
|
835 |
|
|
//searchvalue = casevalue;
|
836 |
|
|
searchexpr = nodedataterm + " != '" + casevalue + "' ";
|
837 |
|
|
} else {
|
838 |
|
|
//searchvalue = casevalue;
|
839 |
|
|
String oper = null;
|
840 |
|
|
if (searchmode.equals("greater-than")) {
|
841 |
|
|
oper = ">";
|
842 |
|
|
} else if (searchmode.equals("greater-than-equals")) {
|
843 |
|
|
oper = ">=";
|
844 |
|
|
} else if (searchmode.equals("less-than")) {
|
845 |
|
|
oper = "<";
|
846 |
|
|
} else if (searchmode.equals("less-than-equals")) {
|
847 |
|
|
oper = "<=";
|
848 |
|
|
} else {
|
849 |
|
|
System.out.println("NOT expected case. NOT recognized operator: " +
|
850 |
|
|
searchmode);
|
851 |
|
|
return null;
|
852 |
|
|
}
|
853 |
|
|
try {
|
854 |
|
|
// it is number; numeric comparison
|
855 |
|
|
searchexpr = nodedataterm + " " + oper + " " +
|
856 |
|
|
new Double(casevalue) + " ";
|
857 |
|
|
} catch (NumberFormatException nfe) {
|
858 |
|
|
// these are characters; character comparison
|
859 |
|
|
searchexpr = nodedataterm + " " + oper + " '" + casevalue + "' ";
|
860 |
|
|
}
|
861 |
170
|
jones
|
}
|
862 |
|
|
|
863 |
178
|
jones
|
self.append("SELECT DISTINCT docid FROM xml_nodes WHERE \n");
|
864 |
795
|
bojilova
|
//self.append(nodedataterm + " LIKE " + "'" + searchvalue + "' ");
|
865 |
|
|
self.append(searchexpr);
|
866 |
170
|
jones
|
|
867 |
|
|
if (pathexpr != null) {
|
868 |
|
|
self.append("AND parentnodeid IN ");
|
869 |
706
|
bojilova
|
// use XML Index
|
870 |
|
|
if ( useXMLIndex ) {
|
871 |
|
|
self.append("(SELECT nodeid FROM xml_index WHERE path LIKE " +
|
872 |
|
|
"'" + pathexpr + "') " );
|
873 |
|
|
// without using XML Index; using nested statements instead
|
874 |
|
|
} else {
|
875 |
|
|
self.append(useNestedStatements(pathexpr));
|
876 |
|
|
}
|
877 |
170
|
jones
|
}
|
878 |
|
|
|
879 |
|
|
return self.toString();
|
880 |
|
|
}
|
881 |
|
|
|
882 |
706
|
bojilova
|
/*
|
883 |
|
|
* Constraint the query with @pathexp without using the XML Index,
|
884 |
|
|
* but nested SQL statements instead. The query migth be slower.
|
885 |
|
|
*/
|
886 |
|
|
private String useNestedStatements(String pathexpr)
|
887 |
|
|
{
|
888 |
|
|
StringBuffer nestedStmts = new StringBuffer();
|
889 |
|
|
Vector nodes = new Vector();
|
890 |
|
|
String path = pathexpr;
|
891 |
|
|
int inx = 0;
|
892 |
|
|
|
893 |
|
|
do {
|
894 |
|
|
inx = path.lastIndexOf("/");
|
895 |
|
|
//System.out.println(path.substring(inx+1));
|
896 |
|
|
nodes.addElement(path.substring(inx+1));
|
897 |
|
|
path = path.substring(0, Math.abs(inx));
|
898 |
|
|
} while ( inx > 0 );
|
899 |
|
|
|
900 |
|
|
// nested statements
|
901 |
|
|
int i = 0;
|
902 |
|
|
for (i = 0; i < nodes.size()-1; i++) {
|
903 |
|
|
nestedStmts.append("(SELECT nodeid FROM xml_nodes" +
|
904 |
|
|
" WHERE nodename LIKE '" +
|
905 |
|
|
(String)nodes.elementAt(i) + "'" +
|
906 |
|
|
" AND parentnodeid IN ");
|
907 |
|
|
}
|
908 |
|
|
// for the last statement: it is without " AND parentnodeid IN "
|
909 |
|
|
nestedStmts.append("(SELECT nodeid FROM xml_nodes" +
|
910 |
|
|
" WHERE nodename LIKE '" +
|
911 |
|
|
(String)nodes.elementAt(i) + "'" );
|
912 |
|
|
// node.size() number of closing brackets
|
913 |
|
|
for (i = 0; i < nodes.size(); i++) {
|
914 |
|
|
nestedStmts.append(")");
|
915 |
|
|
}
|
916 |
|
|
|
917 |
|
|
|
918 |
710
|
berkley
|
//System.out.println(nestedStmts.toString());
|
919 |
706
|
bojilova
|
return nestedStmts.toString();
|
920 |
|
|
}
|
921 |
|
|
|
922 |
172
|
jones
|
/**
|
923 |
|
|
* create a String description of the query that this instance represents.
|
924 |
|
|
* This should become a way to get the XML serialization of the query.
|
925 |
|
|
*/
|
926 |
709
|
bojilova
|
public String toString() {
|
927 |
159
|
jones
|
|
928 |
709
|
bojilova
|
return this.printSQL(true);
|
929 |
159
|
jones
|
}
|
930 |
158
|
jones
|
}
|
931 |
155
|
jones
|
}
|