The method BooleanQuery.add( Query q, BooleanClause.Occur o) accepts Query objects that are null for its first parameter i.e. it doesn't throw any exception. However, when we try to get the string form of the same BooleanQuery object, it throws a NullPointerException from within the toString() code of BooleanQuery.
Try this code for example: BooleanQuery bq = new BooleanQuery(); bq.add(null, BooleanClause.Occur.SHOULD); System.out.println( bq.toString() ); It throws the following exception: Exception in thread "main" java.lang.NullPointerException at org.apache.lucene.search.BooleanQuery.toString(BooleanQuery.java:421) at org.apache.lucene.search.Query.toString(Query.java:79) at deshaw.reccms.search.LuceneGenerator.main(LuceneGenerator.java:751) It seems to me that an IllegalArgumentException or some other RuntimeException should be thrown at line no. 2, from the BooleanQuery.add() method, because clearly BooleanQuery objects don't handle null Queries. Thoughts? Thanks, Venu --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]