Package ivory.lsh.data

Examples of ivory.lsh.data.PermutationByBit.nextPermutation()

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      return randomPermFile;
    }
    SequenceFile.Writer writer = SequenceFile.createWriter(fs, job, new Path(randomPermFile), IntWritable.class, ArrayListOfIntsWritable.class);
    Permutation p = new PermutationByBit(numBits);
    for(int i=0;i<numOfPermutations;i++){
      ArrayListOfIntsWritable perm = p.nextPermutation();
      writer.append(new IntWritable(i), perm);
      sLogger.debug(i +":"+perm);
    }
    writer.close();
    sLogger.info("Random permutations written.");
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    SequenceFile.Writer writer = SequenceFile.createWriter(fs, job, new Path(randomPermFile),
        IntWritable.class, ArrayListOfIntsWritable.class);
    Permutation p = new PermutationByBit(numBits);
    for (int i = 0; i < numOfPermutations; i++) {
      ArrayListOfIntsWritable perm = p.nextPermutation();
      writer.append(new IntWritable(i), perm);
      sLogger.debug(i + ":" + perm);
    }
    writer.close();
    sLogger.info("Random permutations written.");
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    }
    SequenceFile.Writer writer = SequenceFile.createWriter(fs, job, new Path(randomPermFile),
        IntWritable.class, ArrayListOfIntsWritable.class);
    Permutation p = new PermutationByBit(numBits);
    for (int i = 0; i < numOfPermutations; i++) {
      ArrayListOfIntsWritable perm = p.nextPermutation();
      writer.append(new IntWritable(i), perm);
      sLogger.debug(i + ":" + perm);
    }
    writer.close();
    sLogger.info("Random permutations written.");
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    System.out.println(s);

    int loopcnt = 0;
    MinhashSignature permutedS = new MinhashSignature(D);
    while (loopcnt++ < 10) {
      ArrayListOfIntsWritable a = p.nextPermutation();
      s.perm(a, permutedS);
      for (int i = 0; i < s.size(); i++) {
        assertTrue(permutedS.containsTerm(s.get(i)));
      }
      assertTrue(permutedS.size() == s.size());
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    int cntBits = s.countSetBits();

    int loopcnt = 0;
    NBitSignature permutedS = new NBitSignature(D);
    while (loopcnt++ < 100) {
      ArrayListOfIntsWritable a = p.nextPermutation();
      s.perm(a, permutedS);
      System.out.println(permutedS.countSetBits());
      assertTrue(cntBits == permutedS.countSetBits());
      // System.out.println(permutedS);
    }
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  // }

  @Test
  public void testSubSignature() {
    PermutationByBit p = new PermutationByBit(D);
    ArrayListOfIntsWritable a = p.nextPermutation();

    for (int i = 0; i < 100000; i++) {

      NBitSignature s = getRandomSignature();
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    System.out.println(s);

    int loopcnt = 0;
    MinhashSignature permutedS = new MinhashSignature(D);
    while (loopcnt++ < 10) {
      ArrayListOfIntsWritable a = p.nextPermutation();
      s.perm(a, permutedS);
      for (int i = 0; i < s.size(); i++) {
        assertTrue(permutedS.containsTerm(s.get(i)));
      }
      assertTrue(permutedS.size() == s.size());
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    PermutationByBit p = new PermutationByBit(64);
    SixtyFourBitSignature permutedS = new SixtyFourBitSignature(64);
    ArrayListOfIntsWritable a;
    int loopcnt = 0;
    while (loopcnt++ < 1000000) {
        a = p.nextPermutation();
        s.perm(a, permutedS);
       
    }
  }
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