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Viewing changes to lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/BooleanQueryBuilder.java

  • Committer: Sebastian Meyer
  • Date: 2012-08-03 09:12:40 UTC
  • Revision ID: sebastian.meyer@slub-dresden.de-20120803091240-x6861b0vabq1xror
https://launchpad.net/bugs/985487
Remove Lucene and Solr source code and add patches instead
Fix Bug #985487: Auto-suggestion for the search interface

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lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/BooleanQueryBuilder.java
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/*
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 * Created on 25-Jan-2006
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 */
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package org.apache.lucene.xmlparser.builders;
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import org.apache.lucene.search.BooleanClause;
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import org.apache.lucene.search.BooleanQuery;
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import org.apache.lucene.search.Query;
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import org.apache.lucene.xmlparser.DOMUtils;
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import org.apache.lucene.xmlparser.ParserException;
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import org.apache.lucene.xmlparser.QueryBuilder;
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import org.w3c.dom.Element;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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/**
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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * contributor license agreements.  See the NOTICE file distributed with
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 * this work for additional information regarding copyright ownership.
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 * The ASF licenses this file to You under the Apache License, Version 2.0
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 * (the "License"); you may not use this file except in compliance with
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 * the License.  You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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/**
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 * 
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 */
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public class BooleanQueryBuilder implements QueryBuilder {
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        private QueryBuilder factory;
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        public BooleanQueryBuilder(QueryBuilder factory)
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        {
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                this.factory=factory;
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        }
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        /* (non-Javadoc)
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         * @see org.apache.lucene.xmlparser.QueryObjectBuilder#process(org.w3c.dom.Element)
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         */
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        public Query getQuery(Element e) throws ParserException {
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                BooleanQuery bq=new BooleanQuery(DOMUtils.getAttribute(e,"disableCoord",false));
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                bq.setMinimumNumberShouldMatch(DOMUtils.getAttribute(e,"minimumNumberShouldMatch",0));
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                bq.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));
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                NodeList nl = e.getChildNodes();
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                for(int i=0;i<nl.getLength();i++)
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                {
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                        Node node = nl.item(i);
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                        if(node.getNodeName().equals("Clause"))
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                        {
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                                Element clauseElem=(Element) node;
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                                BooleanClause.Occur occurs=getOccursValue(clauseElem);
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                                Element clauseQuery=DOMUtils.getFirstChildOrFail(clauseElem);
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                                Query q=factory.getQuery(clauseQuery);
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                                bq.add(new BooleanClause(q,occurs));
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                        }
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                }
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                return bq;
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        }
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        static BooleanClause.Occur getOccursValue(Element clauseElem) throws ParserException
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        {
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                String occs=clauseElem.getAttribute("occurs");
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                BooleanClause.Occur occurs=BooleanClause.Occur.SHOULD;
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                if("must".equalsIgnoreCase(occs))
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                {
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                        occurs=BooleanClause.Occur.MUST;
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                }
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                else
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                {
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                        if("mustNot".equalsIgnoreCase(occs))
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                        {
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                                occurs=BooleanClause.Occur.MUST_NOT;
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                        }                       
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                        else
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                        {
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                                if(("should".equalsIgnoreCase(occs))||("".equals(occs)))
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                                {
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                                        occurs=BooleanClause.Occur.SHOULD;
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                                }                       
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                                else                            
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                                {
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                                        if(occs!=null)
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                                        {
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                                                throw new ParserException("Invalid value for \"occurs\" attribute of clause:"+occs);
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                                        }
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                                }
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                        }
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                }
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                return occurs;
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        }
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}