asterixdb/asterix-fuzzyjoin/src/test/java/org/apache/asterix/fuzzyjoin/tests/FuzzyJoinTest.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.tests;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.util.ArrayList;

import org.apache.asterix.fuzzyjoin.FuzzyJoinMemory;
import org.apache.asterix.fuzzyjoin.ResultSelfJoin;
import org.apache.asterix.fuzzyjoin.tests.dataset.AbstractDataset;
import org.apache.asterix.fuzzyjoin.tests.dataset.AbstractDataset.Directory;
import org.apache.asterix.fuzzyjoin.tests.dataset.DBLPSmallDataset;
import org.junit.Test;

public class FuzzyJoinTest {

    private static final AbstractDataset dataset = new DBLPSmallDataset();
    private static final String base = "data/";

    @Test
    public void test() throws Exception {

        ArrayList<int[]> records = new ArrayList<int[]>();
        ArrayList<Integer> rids = new ArrayList<Integer>();
        ArrayList<ResultSelfJoin> results = new ArrayList<ResultSelfJoin>();

        dataset.createDirecotries(new String[] { base });

        FuzzyJoinMemory fj = new FuzzyJoinMemory(dataset.getThreshold());

        FuzzyJoinMemory.readRecords(base + dataset.getPathPart0(Directory.SSJOININ), records, rids);

        for (int[] record : records) {
            results.addAll(fj.selfJoinAndAddRecord(record));
        }

        BufferedWriter out = new BufferedWriter(new FileWriter(base + dataset.getPathPart0(Directory.SSJOINOUT)));
        for (ResultSelfJoin result : results) {
            out.write(
                    String.format("%d %d %.3f\n", rids.get(result.indexX), rids.get(result.indexY), result.similarity));
        }
        out.close();

        FuzzyJoinTestUtil.verifyDirectory(base + dataset.getPathPart0(Directory.SSJOINOUT),
                base + dataset.getPathExpected(Directory.SSJOINOUT));
    }
}