Package org.apache.lucene.queryParser.core.config

Examples of org.apache.lucene.queryParser.core.config.QueryConfigHandler

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    // convert the CharSequence into a QueryNode tree
    QueryNode queryTree = queryParser.parse("body:text", null);

    // create a config handler with a attribute used in
    // UniqueFieldQueryNodeProcessor
    QueryConfigHandler spanQueryConfigHandler = new SpansQueryConfigHandler();
    UniqueFieldAttribute uniqueFieldAtt = spanQueryConfigHandler
        .getAttribute(UniqueFieldAttribute.class);
    uniqueFieldAtt.setUniqueField("index");

    // set up the processor pipeline with the ConfigHandler
    // and create the pipeline for this simple demo
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    AnalyzerAttribute attr = getQueryConfigHandler().getAttribute(AnalyzerAttribute.class);
    attr.setAnalyzer(analyzer);
  }
 
  public Analyzer getAnalyzer() {   
    QueryConfigHandler config = this.getQueryConfigHandler();

    if ( config.hasAttribute(AnalyzerAttribute.class)) {
      AnalyzerAttribute attr = config.getAttribute(AnalyzerAttribute.class);
      return attr.getAnalyzer();
    }

    return null;      
  }
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    // empty constructor
  }

  @Override
  public QueryNode process(QueryNode queryTree) throws QueryNodeException {
    QueryConfigHandler queryConfig = getQueryConfigHandler();

    if (queryConfig != null) {

      if (queryConfig.hasAttribute(DefaultPhraseSlopAttribute.class)) {
        this.defaultPhraseSlop = queryConfig.getAttribute(
            DefaultPhraseSlopAttribute.class).getDefaultPhraseSlop();

        return super.process(queryTree);

      }
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  @Override
  protected QueryNode preProcessNode(QueryNode node) throws QueryNodeException {

    if (node instanceof FuzzyQueryNode) {
      FuzzyQueryNode fuzzyNode = (FuzzyQueryNode) node;
      QueryConfigHandler config = getQueryConfigHandler();

      if (config != null && config.hasAttribute(FuzzyAttribute.class)) {
        FuzzyAttribute fuzzyAttr = config.getAttribute(FuzzyAttribute.class);
        fuzzyNode.setPrefixLength(fuzzyAttr.getPrefixLength());

        if (fuzzyNode.getSimilarity() < 0) {
          fuzzyNode.setSimilarity(fuzzyAttr.getFuzzyMinSimilarity());
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    if (node instanceof FieldableNode &&
        (node.getParent() == null || !(node.getParent() instanceof FieldableNode))) {
     
      FieldableNode fieldNode = (FieldableNode) node;
      QueryConfigHandler config = getQueryConfigHandler();

      if (config != null) {
        CharSequence field = fieldNode.getField();
        FieldConfig fieldConfig = config.getFieldConfig(StringUtils.toString(field));

        if (fieldConfig != null && fieldConfig.hasAttribute(BoostAttribute.class)) {
          BoostAttribute boostAttr = fieldConfig.getAttribute(BoostAttribute.class);

          return new BoostQueryNode(node, boostAttr.getBoost());
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  protected QueryNode preProcessNode(QueryNode node) throws QueryNodeException {

    if (node instanceof FieldableNode) {
      FieldableNode fieldNode = (FieldableNode) node;

      QueryConfigHandler queryConfig = getQueryConfigHandler();

      if (queryConfig == null) {
        throw new IllegalArgumentException(
            "A config handler is expected by the processor UniqueFieldQueryNodeProcessor!");
      }

      if (!queryConfig.hasAttribute(UniqueFieldAttribute.class)) {
        throw new IllegalArgumentException(
            "UniqueFieldAttribute should be defined in the config handler!");
      }

      CharSequence uniqueField = queryConfig.getAttribute(
          UniqueFieldAttribute.class).getUniqueField();

      fieldNode.setField(uniqueField);

    }
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    if (node instanceof FieldableNode &&
        (node.getParent() == null || !(node.getParent() instanceof FieldableNode))) {
     
      FieldableNode fieldNode = (FieldableNode) node;
      QueryConfigHandler config = getQueryConfigHandler();

      if (config != null) {
        FieldConfig fieldConfig = config.getFieldConfig(fieldNode.getField());

        if (fieldConfig != null && fieldConfig.hasAttribute(BoostAttribute.class)) {
          BoostAttribute boostAttr = (BoostAttribute) fieldConfig.getAttribute(BoostAttribute.class);

          return new BoostQueryNode(node, boostAttr.getBoost());
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  public DefaultPhraseSlopQueryNodeProcessor() {
    // empty constructor
  }

  public QueryNode process(QueryNode queryTree) throws QueryNodeException {
    QueryConfigHandler queryConfig = getQueryConfigHandler();

    if (queryConfig != null) {

      if (queryConfig.hasAttribute(DefaultPhraseSlopAttribute.class)) {
        this.defaultPhraseSlop = ((DefaultPhraseSlopAttribute) queryConfig
            .getAttribute(DefaultPhraseSlopAttribute.class))
            .getDefaultPhraseSlop();

        return super.process(queryTree);
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  @Override
  protected QueryNode preProcessNode(QueryNode node) throws QueryNodeException {

    if (node instanceof FuzzyQueryNode) {
      FuzzyQueryNode fuzzyNode = (FuzzyQueryNode) node;
      QueryConfigHandler config = getQueryConfigHandler();

      if (config != null && config.hasAttribute(FuzzyAttribute.class)) {
        FuzzyAttribute fuzzyAttr = (FuzzyAttribute) config
            .getAttribute(FuzzyAttribute.class);
        fuzzyNode.setPrefixLength(fuzzyAttr.getPrefixLength());

        if (fuzzyNode.getSimilarity() < 0) {
          fuzzyNode.setSimilarity(fuzzyAttr.getFuzzyMinSimilarity());
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    // convert the CharSequence into a QueryNode tree
    QueryNode queryTree = queryParser.parse("body:text", null);

    // create a config handler with a attribute used in
    // UniqueFieldQueryNodeProcessor
    QueryConfigHandler spanQueryConfigHandler = new SpansQueryConfigHandler();
    UniqueFieldAttribute uniqueFieldAtt = (UniqueFieldAttribute) spanQueryConfigHandler
        .getAttribute(UniqueFieldAttribute.class);
    uniqueFieldAtt.setUniqueField("index");

    // set up the processor pipeline with the ConfigHandler
    // and create the pipeline for this simple demo
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Related Classes of org.apache.lucene.queryParser.core.config.QueryConfigHandler

  • org.apache.lucene.queryParser.spans.TestSpanQueryParserSimpleSample
  • org.apache.lucene.queryParser.spans.UniqueFieldQueryNodeProcessor
  • org.apache.lucene.queryParser.standard.processors.BoostQueryNodeProcessor
  • org.apache.lucene.queryParser.standard.processors.DefaultPhraseSlopQueryNodeProcessor
  • org.apache.lucene.queryParser.standard.processors.FuzzyQueryNodeProcessor
  • org.apache.lucene.queryParser.standard.processors.NumericQueryNodeProcessor
  • org.apache.lucene.queryParser.standard.processors.NumericRangeQueryNodeProcessor
  • org.apache.lucene.queryParser.standard.StandardQueryParser
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