/**
 * Copyright 2014 National University of Ireland, Galway.
 *
 * This file is part of the SIREn project. Project and contact information:
 *
 *  https://github.com/rdelbru/SIREn
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sindice.siren.qparser.keyword.builders;

import org.apache.lucene.queryparser.flexible.core.QueryNodeException;
import org.apache.lucene.queryparser.flexible.core.messages.QueryParserMessages;
import org.apache.lucene.queryparser.flexible.core.nodes.MatchNoDocsQueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.messages.MessageImpl;
import org.apache.lucene.queryparser.flexible.standard.parser.EscapeQuerySyntaxImpl;
import org.sindice.siren.search.node.NodeBooleanQuery;

/**
 * Builds an empty {@link NodeBooleanQuery} object from a
 * {@link MatchNoDocsQueryNode} object.
 */
public class MatchNoDocsQueryNodeBuilder implements KeywordQueryBuilder {

  public MatchNoDocsQueryNodeBuilder() {
    // empty constructor
  }

  public NodeBooleanQuery build(final QueryNode queryNode) throws QueryNodeException {

    // validates node
    if (!(queryNode instanceof MatchNoDocsQueryNode)) {
      throw new QueryNodeException(new MessageImpl(
          QueryParserMessages.LUCENE_QUERY_CONVERSION_ERROR, queryNode
              .toQueryString(new EscapeQuerySyntaxImpl()), queryNode.getClass()
              .getName()));
    }

    return new NodeBooleanQuery();
  }

}