asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/fuzzyjoin/tokenorder/TokenLoad.java

/**
 * 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.asterix.fuzzyjoin.tokenorder;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Serializable;

import org.apache.asterix.fuzzyjoin.FuzzyJoinConfig;

public class TokenLoad implements Serializable {
    private final String path;
    private final TokenRank rank;

    public TokenLoad(String path, TokenRank rank) {
        this.path = path;
        this.rank = rank;
    }

    public void loadTokenRank() {
        loadTokenRank(1);
    }

    public void loadTokenRank(int factor) {
        try (BufferedReader fis = new BufferedReader(
                // new FileReader(path.toString())
                new InputStreamReader(new FileInputStream(path), "UTF-8"))) {
            String token = null;
            while ((token = fis.readLine()) != null) {
                rank.add(token);
                // only used when increasing the token dictionary
                for (int i = 1; i < factor; i++) {
                    // remove _COUNT at the end of the token (it is removed in
                    // the new records anyway)
                    rank.add(token.split(FuzzyJoinConfig.TOKEN_SEPARATOR_REGEX)[0] + i);
                }
            }
        } catch (IOException ioe) {
            throw new RuntimeException(ioe);
        }
    }
}