asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/fuzzyjoin/tokenorder/IntTokenCountRankFrequency.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.util.HashMap;

import org.apache.asterix.fuzzyjoin.IntPair;

public class IntTokenCountRankFrequency implements IntTokenCountRank {
    /**
     *
     */
    private static final long serialVersionUID = 1L;

    private final HashMap<IntPair, Integer> ranksMap = new HashMap<IntPair, Integer>();
    private final IntPair tmpPair = new IntPair();
    private int crtRank = 0;

    @Override
    public int add(int token, int count) {
        int prevRank = crtRank;
        ranksMap.put(new IntPair(token, count), prevRank);
        crtRank++;
        return prevRank;
    }

    @Override
    public int getRank(int token, int count) {
        tmpPair.set(token, count);
        Integer rank = ranksMap.get(tmpPair);
        if (rank == null) {
            return -1;
        }
        return rank;
    }

    @Override
    public String toString() {
        return "[" + crtRank + ",\n " + ranksMap + "\n]";
    }
}