DO NOT REPLY [Bug 33848] - ArrayIndexOutOfBoundsException when using MultiFieldQueryParser

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http://issues.apache.org/bugzilla/show_bug.cgi?id=33848





------- Additional Comments From john.wang@gmail.com  2005-05-15 19:10 -------
Created an attachment (id=15035)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=15035&action=view)
Added a nullcheck for Query instances before adding to the multi clause.

I wrote a unit test to try to recreate this issue with the latest trunk code. I
see that the ArrayIndexOutofBounds issue is gone. However, I do see null
Queries are added to resulting Query when switching from the deprecated method
by using the non-static parse method. After a little investigation, I see that
it is missing some null checks.

Here is the unit test and attached is the modified source of
MultiFieldQueryParser.java.

public static void main(String[] args) throws Exception{

		String[] fields=new String[]{"f1","f2","f3","f4","f5"};
		
		MultiFieldQueryParser parser=new
MultiFieldQueryParser(fields,new TestAnalyzer(fields));
		String qString="bla AND blo";
	
		Query q=parser.parse(qString);
		
		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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