/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.indices.analysis.pl;

import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.pl.PolishAnalyzer;
import org.apache.lucene.analysis.stempel.StempelFilter;
import org.apache.lucene.analysis.stempel.StempelStemmer;
import org.egothor.stemmer.Trie;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.analysis.AnalyzerScope;
import org.elasticsearch.index.analysis.PreBuiltAnalyzerProviderFactory;
import org.elasticsearch.index.analysis.PreBuiltTokenFilterFactoryFactory;
import org.elasticsearch.index.analysis.TokenFilterFactory;
import org.elasticsearch.indices.analysis.IndicesAnalysisService;

import java.io.IOException;

/**
 * Registers indices level analysis components so, if not explicitly configured, will be shared
 * among all indices.
 */
public class PolishIndicesAnalysis extends AbstractComponent {

    @Inject
    public PolishIndicesAnalysis(Settings settings, IndicesAnalysisService indicesAnalysisService) {
        super(settings);
        indicesAnalysisService.analyzerProviderFactories().put("polish", new PreBuiltAnalyzerProviderFactory("polish", AnalyzerScope.INDICES, new PolishAnalyzer()));

        indicesAnalysisService.tokenFilterFactories().put("polish_stem", new PreBuiltTokenFilterFactoryFactory(new TokenFilterFactory() {
            @Override public String name() {
                return "polish_stem";
            }

            @Override public TokenStream create(TokenStream tokenStream) {
                Trie tire;
                try {
                    tire = StempelStemmer.load(PolishAnalyzer.class.getResourceAsStream(PolishAnalyzer.DEFAULT_STEMMER_FILE));
                } catch (IOException ex) {
                    throw new RuntimeException("Unable to load default stemming tables", ex);
                }
                return new StempelFilter(tokenStream, new StempelStemmer(tire));
            }
        }));
    }
}