AqpFieldQueryNodeBuilder.java

package org.apache.lucene.queryparser.flexible.aqp.builders;

import org.apache.lucene.index.Term;
import org.apache.lucene.queryparser.flexible.core.QueryNodeException;
import org.apache.lucene.queryparser.flexible.core.nodes.FieldQueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.standard.builders.StandardQueryBuilder;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;

public class AqpFieldQueryNodeBuilder implements StandardQueryBuilder {

  public AqpFieldQueryNodeBuilder() {
    // empty constructor
  }

  public Query build(QueryNode queryNode) throws QueryNodeException {
    FieldQueryNode fieldNode = (FieldQueryNode) queryNode;

    if (fieldNode.getFieldAsString().equals("*")
        && fieldNode.getTextAsString().equals("*")) {
      return new MatchAllDocsQuery();
    }

    return new TermQuery(new Term(fieldNode.getFieldAsString(),
        fieldNode.getTextAsString()));

  }

}