/**
* 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.processors;
import java.util.List;
import org.apache.lucene.queryparser.flexible.core.QueryNodeException;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.SlopQueryNode;
import org.apache.lucene.queryparser.flexible.core.processors.QueryNodeProcessorImpl;
import org.apache.lucene.queryparser.flexible.messages.MessageImpl;
import org.apache.lucene.queryparser.flexible.standard.nodes.MultiPhraseQueryNode;
import org.apache.lucene.queryparser.flexible.standard.parser.EscapeQuerySyntaxImpl;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.MultiPhraseQuery;
import org.apache.lucene.search.Query;
import org.sindice.siren.qparser.keyword.builders.MatchAllDocsQueryNodeBuilder;
import org.sindice.siren.search.node.NodePhraseQuery;
/**
* This processor throws an exception if it encounters a {@link Query}
* that is not supported in SIREn.
*
* <p>
*
* Such queries are:
* <ul>
* <li>{@link NodePhraseQuery} with slop different to 0</li>
* <li>{@link MultiPhraseQuery}</li>
* <li>{@link MatchAllDocsQuery}</li>
* </ul>
*/
public class NotSupportedQueryProcessor
extends QueryNodeProcessorImpl {
@Override
protected QueryNode preProcessNode(final QueryNode node)
throws QueryNodeException {
if (node instanceof SlopQueryNode && ((SlopQueryNode) node).getValue() != 0) {
throw new QueryNodeException(new MessageImpl("Slop queries are not supported",
node.toQueryString(new EscapeQuerySyntaxImpl())));
} else if (node instanceof MultiPhraseQueryNode) {
throw new QueryNodeException(new MessageImpl("Multi phrase queries are not supported",
node.toQueryString(new EscapeQuerySyntaxImpl())));
} else if (node instanceof MatchAllDocsQueryNodeBuilder) {
throw new QueryNodeException(new MessageImpl("MatchAllDocsQueries are not supported",
node.toQueryString(new EscapeQuerySyntaxImpl())));
}
return node;
}
@Override
protected QueryNode postProcessNode(final QueryNode node)
throws QueryNodeException {
return node;
}
@Override
protected List<QueryNode> setChildrenOrder(final List<QueryNode> children)
throws QueryNodeException {
return children;
}
}