/**
* 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.crunch.contrib.bloomfilter;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.apache.crunch.test.CrunchTestSupport;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.util.bloom.BloomFilter;
import org.apache.hadoop.util.bloom.Key;
import org.junit.Test;
public class BloomFiltersIT extends CrunchTestSupport implements Serializable {
@Test
public void testFilterCreation() throws IOException {
String inputPath = tempDir.copyResourceFileName("shakes.txt");
BloomFilterFn<String> filterFn = new BloomFilterFn<String>() {
@Override
public Collection<Key> generateKeys(String input) {
List<String> parts = Arrays.asList(StringUtils.split(input, " "));
Collection<Key> keys = new HashSet<Key>();
for (String stringpart : parts) {
keys.add(new Key(stringpart.getBytes()));
}
return keys;
}
};
Map<String, BloomFilter> filterValues = BloomFilterFactory.createFilter(new Path(inputPath), filterFn).getValue();
assertEquals(1, filterValues.size());
BloomFilter filter = filterValues.get("shakes.txt");
assertTrue(filter.membershipTest(new Key("Mcbeth".getBytes())));
assertTrue(filter.membershipTest(new Key("apples".getBytes())));
}
}