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- Added 2 new parse methods that take arrays of query strings. 

Submited by Andraz Skoric (andraz.skoric@medius.si) back in April 2004


git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150447 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Otis Gospodnetic 2004-08-23 23:07:41 +00:00
parent 34bab2ca15
commit 7123444b75
1 changed files with 88 additions and 0 deletions
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88
src/java/org/apache/lucene/queryParser/MultiFieldQueryParser.java
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@ -80,6 +80,37 @@ public class MultiFieldQueryParser extends QueryParser
return bQuery;
}
/**
* <p>
* Parses a query which searches on the fields specified.
* <p>
* If x fields are specified, this effectively constructs:
* <pre>
* <code>
* (field1:query1) (field2:query2) (field3:query3)...(fieldx:queryx)
* </code>
* </pre>
* @param queries Queries strings to parse
* @param fields Fields to search on
* @param analyzer Analyzer to use
* @throws ParseException if query parsing fails
* @throws TokenMgrError if query parsing fails
*/
public static Query parse(String[] queries, String[] fields,
Analyzer analyzer) throws ParseException
{
if (queries.length != fields.length)
// TODO Exception handling
throw new ParseException("queries.length != fields.length");
BooleanQuery bQuery = new BooleanQuery();
for (int i = 0; i < fields.length; i++)
{
Query q = parse(queries[i], fields[i], analyzer);
bQuery.add(q, false, false);
}
return bQuery;
}
/**
* <p>
* Parses a query, searching on the fields specified.
@ -134,4 +165,61 @@ public class MultiFieldQueryParser extends QueryParser
}
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:query1) +(contents:query2) -(description:query3)
* </code>
* </pre>
*
* @param queries Queries string to parse
* @param fields Fields to search on
* @param flags Flags describing the fields
* @param analyzer Analyzer to use
* @throws ParseException if query parsing fails
* @throws TokenMgrError if query parsing fails
*/
public static Query parse(String[] queries, String[] fields, int[] flags,
Analyzer analyzer) throws ParseException
{
if (queries.length != fields.length)
// TODO Exception handling
throw new ParseException("queries.length != fields.length");
BooleanQuery bQuery = new BooleanQuery();
for (int i = 0; i < fields.length; i++)
{
Query q = parse(queries[i], fields[i], analyzer);
int flag = flags[i];
switch (flag)
{
case REQUIRED_FIELD:
bQuery.add(q, true, false);
break;
case PROHIBITED_FIELD:
bQuery.add(q, false, true);
break;
default:
bQuery.add(q, false, false);
break;
}
}
return bQuery;
}
}