/*
 * Copyright (c) 2011 LinkedIn, Inc
 * 
 * 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 com.flaptor.indextank.query;

import java.io.IOException;
import java.io.Reader;
import java.util.Map;

import org.apache.lucene.analysis.ASCIIFoldingFilter;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.LowerCaseFilter;
import org.apache.lucene.analysis.StopFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.standard.StandardFilter;
import org.apache.lucene.analysis.standard.StandardTokenizer;

import com.flaptor.indextank.query.analyzers.StopAnalyzer;
import com.google.common.collect.Maps;

public class IndexEngineAnalyzer extends StopAnalyzer {

    @SuppressWarnings("deprecation")
	public IndexEngineAnalyzer(Map<Object, Object> configuration) {
        super(configuration);
    }

    public IndexEngineAnalyzer() {
        this(Maps.newHashMap());
    }
    
    /** Constructs a {@link StandardTokenizer} filtered by a {@link
      StandardFilter}, a {@link LowerCaseFilter} and a {@link StopFilter}. */
    @Override
    public TokenStream tokenStream(String fieldName, Reader reader) {
        TokenStream result = super.tokenStream(fieldName, reader);
        result = new ASCIIFoldingFilter(result);
        
        return result;
    }

    @Override
    public TokenStream reusableTokenStream(String fieldName, Reader reader) throws IOException {
        return tokenStream(fieldName, reader);
    }

    public static Analyzer buildAnalyzer(Map<Object, Object> configuration) {
        return new IndexEngineAnalyzer(configuration);
    }
    
}