DO NOT REPLY [Bug 32115] - [PATCH] add boost feature to MultiFieldQueryParser

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http://issues.apache.org/bugzilla/show_bug.cgi?id=32115





------- Additional Comments From john.wang@gmail.com  2005-05-15 19:40 -------
Created an attachment (id=15037)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=15037&action=view)
Added multifield selective boost functionality to MultiFieldQueryParser class.


The attachment includes the changes made in the attachment 15036 for bug 33848.


Here is the unit test I used:

		String[] fields=new String[]{"f1","f2","f3","f4","f5"};
		
		HashMap boostMap=new HashMap();
		boostMap.put("f2",new Float(1.2));
		boostMap.put("f3",new Float(1.3));
		
		MultiFieldQueryParser parser=new
MultiFieldQueryParser(fields,new TestAnalyzer(fields));
		parser.setBoostMap(boostMap);
		String qString="bla AND blo";
	
		Query q=parser.parse(qString);
		//Query q=QueryParser.parse(qString,"f1",new
TestAnalyzer(fields));
		//Query q=MultiFieldQueryParser.parse(qString,fields,new
TestAnalyzer(fields));
		System.out.println(q);
	}

	static class TestAnalyzer extends Analyzer{
		String[] _defaultFields;
		StandardAnalyzer _std;
		public TestAnalyzer(String[] defaultFields){
			_defaultFields=defaultFields;
			_std=new StandardAnalyzer();
		}
		public TokenStream tokenStream(String fieldName, Reader reader)
{
			if ("f1".equals(fieldName)){
				return new EmptyTokenStream();
			}
			else{
				return _std.tokenStream(fieldName, reader);
			}
		}
		
		private static class EmptyTokenStream extends TokenStream{

			public Token next() throws IOException {
				return null;
			}
			
		}
	}


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