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

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

This class can be used to hold any query configuration and no field configuration. For field configuration, it creates a empty {@link FieldConfig} object and delegate it to field config listeners, these are responsible for setting up all the field configuration. {@link QueryConfigHandler} should be extended by classes that intends toprovide configuration to {@link QueryNodeProcessor} objects.This class extends {@link AttributeSource}, so {@link Attribute}s can be attached to it. The class that extends {@link QueryConfigHandler} should also provide{@link FieldConfig} objects for each collection field. @see Attribute @see FieldConfig @see FieldConfigListener @see QueryConfigHandler

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


      fieldNode.setField(uniqueField);


    }

    AnalyzerAttribute attr= (AnalyzerAttribute) getQueryConfigHandler().getAttribute(AnalyzerAttribute.class);
    attr.setAnalyzer(analyzer);
  }
  
  public Analyzer getAnalyzer() {    
    QueryConfigHandler config = this.getQueryConfigHandler();


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


    return null;       
  }

Related Classes of org.apache.lucene.queryParser.core.config.QueryConfigHandler

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