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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.solr.spelling.suggest.fst;
import org.apache.lucene.search.suggest.Lookup;
import org.apache.lucene.search.suggest.fst.WFSTCompletionLookup;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.core.SolrCore;
import org.apache.solr.spelling.suggest.LookupFactory;
/**
* Factory for {@link WFSTCompletionLookup}
*
* @lucene.experimental
*/
public class WFSTLookupFactory extends LookupFactory {
/**
* If true
, exact suggestions are returned first, even if they are prefixes of other
* strings in the automaton (possibly with larger weights).
*/
public static final String EXACT_MATCH_FIRST = "exactMatchFirst";
/** File name for the automaton. */
private static final String FILENAME = "wfst.bin";
@Override
public Lookup create(NamedList params, SolrCore core) {
boolean exactMatchFirst =
params.get(EXACT_MATCH_FIRST) != null
? Boolean.valueOf(params.get(EXACT_MATCH_FIRST).toString())
: true;
return new WFSTCompletionLookup(getTempDir(), "suggester", exactMatchFirst);
}
@Override
public String storeFileName() {
return FILENAME;
}
}