Lucene Free text search Engine

When I was working with the Lucene  search engine, I faced with some problems of "Too many clauses" in the search criteria. To avoid above problem always use PrefixFilters

Term term = new Term(_facetName, axisValue.FromValue);
PrefixFilter filter = new PrefixFilter(term);

instead of

Term term = new Term(_facetName, axisValue.FromValue);
Filter p = new QueryWrapperFilter(new TermQuery(term));


You can avoid words which are very short when indexing. This will improve the performance of the searching. Following is a sample of implementing custom analyzer with the Token filter.


   public class CustomAnalyzer : Analyzer {

      private Set stopSet;
      private int _minTokenLength = 3;


      public static  string[] STOP_WORDS = StopAnalyzer.ENGLISH_STOP_WORDS;

      /** Builds an analyzer. */
      public CustomAnalyzer(int minTokenLength)
          : this(STOP_WORDS, minTokenLength)
      {
      }

      /** Builds an analyzer with the given stop words. */
      public CustomAnalyzer(String[] stopWords,int minTokenLength)
      {
        stopSet = StopFilter.makeStopSet(stopWords);
        _minTokenLength = minTokenLength;
      }

      /** Constructs a {@link StandardTokenizer} filtered by a {@link
      StandardFilter}, a {@link LowerCaseFilter} and a {@link StopFilter}. */
      public override TokenStream tokenStream(String fieldName, Reader reader) {
        TokenStream result = new StandardTokenizer(reader);
        result = new StandardFilter(result);
        result = new LengthTokenFilter(result, _minTokenLength);
        result = new LowerCaseFilter(result);
        result = new StopFilter(result, stopSet);
        return result;
      }
}


ToenFilter to remove tokens with short lengths

public class LengthTokenFilter: TokenFilter {
    private int minLength;

    public int MinLength
    {
        get { return minLength; }
        set { minLength = value; }
    }

    internal LengthTokenFilter(TokenStream input, int minLength)
        : base(input)
    {
        this.minLength = minLength;
    }

    public override Token next(Token result){

        while ((result = input.next(result)) != null) {
            if (result.termLength() >= minLength) {
                return result;
            }
        }

        return null;
    }
}

Flex PopupButton

While I am working with Flex PopupButton, I faced with some issues of Event dispatching and propagation. All the events dispatched inside the PopupButton control will not propagate to the parent container components.I couldn't find a way to catch the events from the controls inside the popup button from the main application.

Flex component explorer

This is really helpful to visualize the flex components and its behavior. http://examples.adobe.com/flex3/componentexplorer/explorer.html

Adobe Flex

Adobe Flex is one of the best RIA application generation platform and for the current project we have decided to use flex.Flex is a highly productive, free open source framework for building and maintaining expressive web applications that deploy consistently on all major browsers, desktops, and operating systems.You can get more information and resources from
http://www.adobe.com/products/flex/