Examples of org.apache.lucene.search.WildcardQuery

org.apache.lucene.search.WildcardQuery
Implements the wildcard search query. Supported wildcards are *, which matches any character sequence (including the empty one), and ?, which matches any single character. Note this query can be slow, as it needs to iterate over many terms. In order to prevent extremely slow WildcardQueries, a Wildcard term should not start with one of the wildcards * or ?.
This query uses the {@link MultiTermQuery#CONSTANT_SCORE_AUTO_REWRITE_DEFAULT}rewrite method. @see WildcardTermEnum

    }


    private void validateIndexContents( NexusIndexer indexer )
        throws Exception
    {
        WildcardQuery q = new WildcardQuery( new Term( ArtifactInfo.UINFO, "*aopalliance*" ) );


        FlatSearchRequest request = new FlatSearchRequest( q );
        request.getContexts().add( context );


        FlatSearchResponse response = indexer.searchFlat( request );

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    // but the two test explicitly testing LIMIT_EXCEEDED were just removed/commented out.


    public void testHitLimitNotReachedSingleContext()
        throws Exception
    {
        WildcardQuery q = new WildcardQuery( new Term( ArtifactInfo.UINFO, "*testng*" ) );


        FlatSearchRequest request = new FlatSearchRequest( q );
        request.setCount( 5 );
        // request.setResultHitLimit( 5 );
        request.getContexts().add( context );

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    }


    public void testHitLimitEqualSingleContext()
        throws Exception
    {
        WildcardQuery q = new WildcardQuery( new Term( ArtifactInfo.UINFO, "*testng*" ) );


        FlatSearchRequest request = new FlatSearchRequest( q );
        request.setCount( 4 );
        // request.setResultHitLimit( 4 );
        request.getContexts().add( context );

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    // }


    public void testHitLimitNotReachedMultipleContexts()
        throws Exception
    {
        WildcardQuery q = new WildcardQuery( new Term( ArtifactInfo.UINFO, "*testng*" ) );


        FlatSearchRequest request = new FlatSearchRequest( q );
        request.setCount( 9 );
        // request.setResultHitLimit( 9 );
        request.setArtifactInfoComparator( ArtifactInfo.REPOSITORY_VERSION_COMPARATOR );

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    }


    public void testHitLimitEqualMultipleContexts()
        throws Exception
    {
        WildcardQuery q = new WildcardQuery( new Term( ArtifactInfo.UINFO, "*testng*" ) );


        FlatSearchRequest request = new FlatSearchRequest( q );
        request.setCount( 8 );
        // request.setResultHitLimit( 8 );
        request.setArtifactInfoComparator( ArtifactInfo.REPOSITORY_VERSION_COMPARATOR );

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         final ValueFactoryImpl valueFactory = new ValueFactoryImpl(new LocationFactory(nsReg));
         BooleanQuery.setMaxClauseCount(Integer.MAX_VALUE);
         BooleanQuery query = new BooleanQuery();


         final String prefix = nsReg.getNamespacePrefixByURI(uri);
         query.add(new WildcardQuery(new Term(FieldNames.LABEL, prefix + ":*")), Occur.SHOULD);
         // name of the property
         query.add(new WildcardQuery(new Term(FieldNames.PROPERTIES_SET, prefix + ":*")), Occur.SHOULD);


         result = getNodes(query);


         // value of the property


         try
         {
            final Set<String> props = getFieldNames();


            query = new BooleanQuery();
            for (final String fieldName : props)
            {
               if (!FieldNames.PROPERTIES_SET.equals(fieldName))
               {
                  query.add(new WildcardQuery(new Term(fieldName, "*" + prefix + ":*")), Occur.SHOULD);
               }
            }
         }
         catch (final IndexException e)
         {

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         final ValueFactoryImpl valueFactory = new ValueFactoryImpl(new LocationFactory(nsReg));
         BooleanQuery.setMaxClauseCount(Integer.MAX_VALUE);
         BooleanQuery query = new BooleanQuery();


         final String prefix = nsReg.getNamespacePrefixByURI(uri);
         query.add(new WildcardQuery(new Term(FieldNames.LABEL, prefix + ":*")), Occur.SHOULD);
         // name of the property
         query.add(new WildcardQuery(new Term(FieldNames.PROPERTIES_SET, prefix + ":*")), Occur.SHOULD);


         result = getNodes(query);


         // value of the property


         try
         {
            final Set<String> props = getFieldNames();


            query = new BooleanQuery();
            for (final String fieldName : props)
            {
               if (!FieldNames.PROPERTIES_SET.equals(fieldName))
               {
                  query.add(new WildcardQuery(new Term(fieldName, "*" + prefix + ":*")), Occur.SHOULD);
               }
            }
         }
         catch (final IndexException e)
         {

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         final ValueFactoryImpl valueFactory = new ValueFactoryImpl(new LocationFactory(nsReg), cleanerHolder);
         BooleanQuery.setMaxClauseCount(Integer.MAX_VALUE);
         BooleanQuery query = new BooleanQuery();


         final String prefix = nsReg.getNamespacePrefixByURI(uri);
         query.add(new WildcardQuery(new Term(FieldNames.LABEL, prefix + ":*")), Occur.SHOULD);
         // name of the property
         query.add(new WildcardQuery(new Term(FieldNames.PROPERTIES_SET, prefix + ":*")), Occur.SHOULD);


         result = getNodes(query);


         // value of the property


         try
         {
            final Set<String> props = getFieldNames();


            query = new BooleanQuery();
            for (final String fieldName : props)
            {
               if (!FieldNames.PROPERTIES_SET.equals(fieldName))
               {
                  query.add(new WildcardQuery(new Term(fieldName, "*" + prefix + ":*")), Occur.SHOULD);
               }
            }
         }
         catch (final IndexException e)
         {

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                aField = "content";
            }


            Query aQuery;
            if (aQueryStr.endsWith("*")) {
                aQuery = new WildcardQuery(new Term(aField, aQueryStr));
            } else {
                aQuery = new TermQuery(new Term(aField, aQueryStr));
            }


            // Perform search

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  @Override
  public void readFields(DataInput in) throws IOException {
    float boost = in.readFloat();
    TermWritable termWritable = new TermWritable();
    termWritable.readFields(in);
    query = new WildcardQuery(termWritable.getTerm());
    query.setBoost(boost);
  }

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