/**
* 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.commons.lang.NotImplementedException;
import org.apache.lucene.queryparser.flexible.core.QueryNodeException;
import org.apache.lucene.queryparser.flexible.core.builders.QueryTreeBuilder;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.SlopQueryNode;
import org.apache.lucene.search.Query;
import org.sindice.siren.search.node.NodePhraseQuery;
/**
* This builder basically reads the {@link Query} object set on the
* {@link SlopQueryNode} child using
* {@link QueryTreeBuilder#QUERY_TREE_BUILDER_TAGID} and applies the slop value
* defined in the {@link SlopQueryNode}.
*/
public class SlopQueryNodeBuilder implements KeywordQueryBuilder {
public SlopQueryNodeBuilder() {
// empty constructor
}
public NodePhraseQuery build(QueryNode queryNode) throws QueryNodeException {
final SlopQueryNode phraseSlopNode = (SlopQueryNode) queryNode;
if (phraseSlopNode.getValue() != 0)
throw new NotImplementedException("Slop Queries not supported in Siren yet");
return (NodePhraseQuery) phraseSlopNode.getChild().getTag(QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID);
// TODO: To implement when siren will support slop queries
// SlopQueryNode phraseSlopNode = (SlopQueryNode) queryNode;
//
// Query query = (Query) phraseSlopNode.getChild().getTag(
// QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID);
//
//
// if (query instanceof PhraseQuery) {
// ((PhraseQuery) query).setSlop(phraseSlopNode.getValue());
//
// } else {
// ((MultiPhraseQuery) query).setSlop(phraseSlopNode.getValue());
// }
//
// return query;
}
}