package com.jph.lucene.parsers;
/**
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;
/**
* A QueryParser which constructs queries to indexSearcher multiple
fields.
* <p/>
* Deze parser kan waarschijnlijk gekicked worden bij Lucene 2.0.
*
* @author Peter Veentjer
*/
public class MultiFieldQueryParserUtil {
/**
* <p/>
* Parses a query which searches on the fields specified.
* <p/>
* If x fields are specified, this effectively constructs:
* <pre>
* <code>
* (field1:query) (field2:query) (field3:query)...(fieldx:query)
* </code>
* </pre>
*
* @param query Query string to parse
* @param fields Fields to indexSearcher on
* @param analyzer Analyzer to use
* @throws ParseException if query parsing fails
* @throws org.apache.lucene.queryParser.TokenMgrError
* if query parsing fails
*/
public static Query parse(String query, String[] fields,
Analyzer analyzer, boolean and) throws ParseException {
BooleanQuery bQuery = new BooleanQuery();
for (int i = 0; i < fields.length; i++) {
QueryParser queryParser = new
QueryParser(fields[i], analyzer);
queryParser.setOperator(and ? QueryParser.AND :
QueryParser.OR);
Query q = queryParser.parse(query);
bQuery.add(q, false, false);
}
return bQuery;
}
/**
* <p/>
* Parses a query, searching on the fields specified.
* Use this if you need to specify certain fields as required,
* and others as prohibited.
* <p><pre>
* Usage:
* <code>
* String[] fields = {"filename", "contents", "description"};
* int[] flags = {MultiFieldQueryParser.NORMAL FIELD,
* MultiFieldQueryParser.REQUIRED FIELD,
* MultiFieldQueryParser.PROHIBITED FIELD,};
* parse(query, fields, flags, analyzer);
* </code>
* </pre>
* <p/>
* The code above would construct a query:
* <pre>
* <code>
* (filename:query) +(contents:query) -(description:query)
* </code>
* </pre>
*
* @param query Query string to parse
* @param fields Fields to indexSearcher on
* @param flags Flags describing the fields
* @param analyzer Analyzer to use
* @throws ParseException if query parsing fails
* @throws org.apache.lucene.queryParser.TokenMgrError
* if query parsing fails
*/
public static Query parse(String query, String[] fields, int[]
flags, Analyzer analyzer, boolean and) throws ParseException {
if (query == null)
throw new NullPointerException("query can`t be
null");
if (fields == null)
throw new NullPointerException("fields can`t be
null");
if (flags == null)
throw new NullPointerException("flags can`t be
null");
if (fields.length != flags.length)
throw new IllegalArgumentException();
if (analyzer == null)
throw new NullPointerException("analyzer can`t
be null");
BooleanQuery bQuery = new BooleanQuery();
for (int i = 0; i < fields.length; i++) {
QueryParser queryParser = new
QueryParser(fields[i], analyzer);
queryParser.setOperator(and ? QueryParser.AND :
QueryParser.OR);
Query q = queryParser.parse(query);
int flag = flags[i];
switch (flag) {
case
MultiFieldQueryParser.REQUIRED_FIELD:
bQuery.add(q, true, false);
break;
case
MultiFieldQueryParser.PROHIBITED_FIELD:
bQuery.add(q, false, true);
break;
case MultiFieldQueryParser.NORMAL_FIELD:
bQuery.add(q, false, false);
break;
default:
throw new
IllegalArgumentException("unrecognized fieldflag: " + flag);
}
}
return bQuery;
}
public static Query parseAnd(String query, String[] fields,
int[] flags, Analyzer analyzer) throws ParseException {
return parse(query, fields, flags, analyzer, true);
}
public static Query parseOr(String query, String[] fields, int[]
flags, Analyzer analyzer) throws ParseException {
return parse(query, fields, flags, analyzer, false);
}
}
-----Oorspronkelijk bericht-----
Van: Volodymyr Bychkoviak [mailto:[EMAIL PROTECTED]
Verzonden: woensdag 20 april 2005 15:21
Aan: [email protected]
Onderwerp: Re: What is going on with subversion.
Sorry, I've already read about servers moving.
Can somebody mail me latest MultiFieldQueryParser.java and
highlighting source code. Because I can't get it from subversion and I
need it urgently.
Thanks in advance.
Regards,
Volodymyr Bychkoviak
Volodymyr Bychkoviak wrote:
I can't connect svn.apache.org. It seems that apache.org is down.
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