org.apache.solr.spelling.suggest.FileDictionaryFactory.java Source code

Introduction

Here is the source code for org.apache.solr.spelling.suggest.FileDictionaryFactory.java

Source

package org.apache.solr.spelling.suggest;

/*
 * 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.
 */

import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;

import org.apache.lucene.search.spell.Dictionary;
import org.apache.lucene.search.suggest.FileDictionary;
import org.apache.solr.core.SolrCore;
import org.apache.solr.search.SolrIndexSearcher;

/**
 * Factory for {@link FileDictionary}
 */
public class FileDictionaryFactory extends DictionaryFactory {

    /** Label for defining fieldDelimiter to be used */
    public static final String FIELD_DELIMITER = "fieldDelimiter";

    @Override
    public Dictionary create(SolrCore core, SolrIndexSearcher searcher) {
        if (params == null) {
            // should not happen; implies setParams was not called
            throw new IllegalStateException("Value of params not set");
        }

        String sourceLocation = (String) params.get(Suggester.LOCATION);

        if (sourceLocation == null) {
            throw new IllegalArgumentException(
                    Suggester.LOCATION + " parameter is mandatory for using FileDictionary");
        }

        String fieldDelimiter = (params.get(FIELD_DELIMITER) != null) ? (String) params.get(FIELD_DELIMITER)
                : FileDictionary.DEFAULT_FIELD_DELIMITER;

        try {
            return new FileDictionary(new InputStreamReader(core.getResourceLoader().openResource(sourceLocation),
                    StandardCharsets.UTF_8), fieldDelimiter);
        } catch (IOException e) {
            throw new RuntimeException();
        }
    }

}