Example usage for org.apache.hadoop.util.bloom Key Key

Introduction

In this page you can find the example usage for org.apache.hadoop.util.bloom Key Key.

Prototype

public Key() 

Source Link

Document

default constructor - use with readFields

Usage

From source file:hivemall.sketch.bloom.BloomAndUDFTest.java

License:Apache License

@Nonnull
private static DynamicBloomFilter createBloomFilter(long seed, int size) {
    DynamicBloomFilter dbf = BloomFilterUtils.newDynamicBloomFilter(3000);
    final Key key = new Key();

    final Random rnd1 = new Random(seed);
    for (int i = 0; i < size; i++) {
        double d = rnd1.nextGaussian();
        String s = Double.toHexString(d);

        key.set(s.getBytes(), 1.0);/* w w  w.  java 2  s.  co m*/
        dbf.add(key);
    }

    return dbf;
}

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From source file:hivemall.sketch.bloom.BloomAndUDFTest.java

License:Apache License

private static void assertNotContains(@Nonnull Filter expected, @Nonnull Filter actual, long seed, int size) {
    final Key key = new Key();

    final Random rnd1 = new Random(seed);
    for (int i = 0; i < size; i++) {
        double d = rnd1.nextGaussian();
        String s = Double.toHexString(d);
        key.set(s.getBytes(), 1.0);//from w  w w .  j a v a  2 s .c  o  m
        Assert.assertEquals(expected.membershipTest(key), actual.membershipTest(key));
    }
}

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From source file:hivemall.sketch.bloom.BloomContainsUDFTest.java

License:Apache License

@Nonnull
private static DynamicBloomFilter createBloomFilter(long seed, int size) {
    DynamicBloomFilter dbf = BloomFilterUtils.newDynamicBloomFilter(30);
    final Key key = new Key();

    final Random rnd1 = new Random(seed);
    for (int i = 0; i < size; i++) {
        double d = rnd1.nextGaussian();
        String s = Double.toHexString(d);
        Text t = new Text(s);
        key.set(t.getBytes(), 1.0);//from   w  ww  .j av  a2s . c  om
        dbf.add(key);
    }

    return dbf;
}

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From source file:hivemall.sketch.bloom.BloomFilterUtilsTest.java

License:Apache License

@Test
public void testDynamicBloomFilter() {
    DynamicBloomFilter dbf = BloomFilterUtils.newDynamicBloomFilter(300000);
    final Key key = new Key();

    final Random rnd1 = new Random(43L);
    for (int i = 0; i < 1000000; i++) {
        double d = rnd1.nextGaussian();
        String s = Double.toHexString(d);
        key.set(s.getBytes(), 1.0);/*from ww  w .  j  a  va2  s  .co  m*/
        dbf.add(key);
    }

    final Random rnd2 = new Random(43L);
    for (int i = 0; i < 1000000; i++) {
        double d = rnd2.nextGaussian();
        String s = Double.toHexString(d);
        key.set(s.getBytes(), 1.0);
        Assert.assertTrue(dbf.membershipTest(key));
    }
}

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From source file:hivemall.sketch.bloom.BloomFilterUtilsTest.java

License:Apache License

@Test
public void testDynamicBloomFilterSerde() throws IOException {
    final Key key = new Key();

    DynamicBloomFilter dbf1 = BloomFilterUtils.newDynamicBloomFilter(300000);
    final Random rnd1 = new Random(43L);
    for (int i = 0; i < 1000000; i++) {
        double d = rnd1.nextGaussian();
        String s = Double.toHexString(d);
        key.set(s.getBytes(), 1.0);/*ww  w . j  ava 2  s. c  o m*/
        dbf1.add(key);
    }

    DynamicBloomFilter dbf2 = BloomFilterUtils.deserialize(BloomFilterUtils.serialize(dbf1),
            new DynamicBloomFilter());
    final Random rnd2 = new Random(43L);
    for (int i = 0; i < 1000000; i++) {
        double d = rnd2.nextGaussian();
        String s = Double.toHexString(d);
        key.set(s.getBytes(), 1.0);
        Assert.assertTrue(dbf2.membershipTest(key));
    }
}

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From source file:hivemall.sketch.bloom.BloomOrUDFTest.java

License:Apache License

private static void assertEquals(@Nonnull Filter expected, @Nonnull Filter actual, long seed, int size) {
    final Key key = new Key();

    final Random rnd1 = new Random(seed);
    for (int i = 0; i < size; i++) {
        double d = rnd1.nextGaussian();
        String s = Double.toHexString(d);
        key.set(s.getBytes(), 1.0);//from  w w w . ja  va 2s  . c o  m
        Assert.assertEquals(expected.membershipTest(key), actual.membershipTest(key));
    }
}

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From source file:org.apache.mahout.utils.nlp.collocations.llr.BloomTokenFilter.java

License:Apache License

/** 
 * @param filter tokens will be checked for membership in this bloom filter
 * @param in the tokenstream to read.//from   w  w  w. j  a  v  a 2 s.  co m
 * @param keepMembers keep memoers of the bloom filter? If true works like
 *   a whitelist and members found in the list are kept and all others are
 *   dropped. If false works like a stoplist and members found in the 
 *   filter are dropped all others are kept.
 */
public BloomTokenFilter(Filter filter, boolean keepMembers, TokenStream in) {
    super(in);
    this.filter = filter;
    this.keepMembers = keepMembers;
    this.key = new Key();
    this.termAtt = addAttribute(CharTermAttribute.class);
    this.encoder = Charsets.UTF_8.newEncoder().onMalformedInput(CodingErrorAction.REPORT)
            .onUnmappableCharacter(CodingErrorAction.REPORT);
}

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From source file:org.apache.mahout.utils.nlp.collocations.llr.BloomTokenFilterTest.java

License:Apache License

/** test standalone filter without tokenfilter wrapping */
@Test//from ww  w.j  a  v  a 2 s  .  co m
public void testFilter() throws IOException {
    Filter filter = getFilter(filterTokens);
    Key k = new Key();
    for (String s : filterTokens) {
        setKey(k, s);
        assertTrue("Key for string " + s + " should be filter member", filter.membershipTest(k));
    }

    for (String s : notFilterTokens) {
        setKey(k, s);
        assertFalse("Key for string " + s + " should not be filter member", filter.membershipTest(k));
    }
}

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From source file:org.apache.mahout.utils.nlp.collocations.llr.BloomTokenFilterTest.java

License:Apache License

private static Filter getFilter(String[] tokens) throws IOException {
    Filter filter = new BloomFilter(100, 50, Hash.JENKINS_HASH);
    Key k = new Key();
    for (String s : tokens) {
        setKey(k, s);/*from  ww  w. j  a  va2 s  .co m*/
        filter.add(k);
    }
    return filter;
}

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