/**
* 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 java.util.List;
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.FieldQueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.TokenizedPhraseQueryNode;
import org.apache.lucene.queryparser.flexible.standard.builders.PhraseQueryNodeBuilder;
import org.sindice.siren.search.node.NodePhraseQuery;
import org.sindice.siren.search.node.NodeTermQuery;
/**
* Builds a {@link NodePhraseQuery} object from a {@link TokenizedPhraseQueryNode}
* object.
*
* <p>
*
* Code taken from {@link PhraseQueryNodeBuilder} and adapted for SIREn
*/
public class NodePhraseQueryNodeBuilder implements KeywordQueryBuilder {
public NodePhraseQueryNodeBuilder() {
// empty constructor
}
public NodePhraseQuery build(final QueryNode queryNode) throws QueryNodeException {
final TokenizedPhraseQueryNode phraseNode = (TokenizedPhraseQueryNode) queryNode;
final NodePhraseQuery phraseQuery = new NodePhraseQuery();
final List<QueryNode> children = phraseNode.getChildren();
if (children != null) {
for (final QueryNode child : children) {
final NodeTermQuery termQuery = (NodeTermQuery) child
.getTag(QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID);
final FieldQueryNode termNode = (FieldQueryNode) child;
phraseQuery.add(termQuery.getTerm(), termNode.getPositionIncrement());
}
}
return phraseQuery;
}
}