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Message-ID: <9050778747856585878CMPYMWVNLK.tlai@trekspace.com>
Date: Thu, 7 Jul 2005 15:04:51 -0400 (EDT)
From: Terence Lai <tlai@trekspace.com>
Reply-To: Terence Lai <tlai@trekspace.com>
To: java-user@lucene.apache.org
Subject: Help on the ParallelMultiSearcher.rewrite(Query) method
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Hi all,

I am currently using Lucene 1.4.2. Since my search documents are huge, I divide the search index into different index directory and make use of the ParallelMultiSearcher to perform the search.

Currently, I am working on the highlight feature using Lucene Sandbox Highlighter. One of the requirements is to convert the Query into the primitive form. I invoked the ParallelMultiSearcher.rewrite(Query). However, I got the exception, UnsupportedOperationException.

I start studying the source code. I discover that the ParallelMultiSearcher calls Query.combine() method to combine multiple primitive query into a single one. By looking at the Query.java, the method hasn't been implemented as you see below:

  /** Expert: called when re-writing queries under MultiSearcher.
   *
   * <p>Only implemented by derived queries, with no
   * {@link #createWeight(Searcher)} implementatation.
   */
  public Query combine(Query[] queries) {
    throw new UnsupportedOperationException();
  }

Does anyone know any alternative to rewrite the query if I have multiple index directories?

Thanks,
Terence


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