/*
 * 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.index.analysis;

import org.apache.lucene.analysis.Analyzer;

import java.io.IOException;
import java.io.Reader;

/**
 *
 */
public abstract class NumericAnalyzer<T extends NumericTokenizer> extends Analyzer {

    @Override
    protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
        try {
            // LUCENE 4 UPGRADE: in reusableTokenStream the buffer size was char[120]
            // Not sure if this is intentional or not
            return new TokenStreamComponents(createNumericTokenizer(reader, new char[32]));
        } catch (IOException e) {
            throw new RuntimeException("Failed to create numeric tokenizer", e);
        }
    }

    protected abstract T createNumericTokenizer(Reader reader, char[] buffer) throws IOException;
}
