List of longHashCode() Examples

Examples of longHashCode()

org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()
Calculate a 64-bit hash function for this path. Unlike {@link #hashCode()}, this method is not part of the Java standard, and is only used if explicitly called by the user.
If two objects are equal(), their hash codes need to be equal, so like in {@link #equals(Object)}, longHashCode does not consider unused portions of the internal buffers in its calculation.
The hash function used is a simple multiplicative hash function, with the multiplier 65599. While Java's standard multiplier 31 (used in {@link #hashCode()}) gives a good distribution for ASCII strings, it turns out that for foreign-language strings (with 16-bit characters) it gives too many collisions, and a bigger multiplier produces fewer collisions in this case.

Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    
    // check that two empty paths are equal, even if they have different
    // capacities:
    CategoryPath p1 = new CategoryPath(0,0);
    CategoryPath p2 = new CategoryPath(1000,300);
    assertEquals(p1.longHashCode(), p2.longHashCode());
    // If we make p2 different, it is no longer equals:
    p2.add("hi");
    assertEquals(false, p1.longHashCode()==p2.longHashCode());
    // Build two paths separately, and compare them
    p1.clear();

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Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    CategoryPath p1 = new CategoryPath(0,0);
    CategoryPath p2 = new CategoryPath(1000,300);
    assertEquals(p1.longHashCode(), p2.longHashCode());
    // If we make p2 different, it is no longer equals:
    p2.add("hi");
    assertEquals(false, p1.longHashCode()==p2.longHashCode());
    // Build two paths separately, and compare them
    p1.clear();
    p1.add("hello");
    p1.add("world");
    p2.clear();

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Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    p1.add("hello");
    p1.add("world");
    p2.clear();
    p2.add("hello");
    p2.add("world");
    assertEquals(p1.longHashCode(), p2.longHashCode());
    // Check that comparison really don't look at old data which might
    // be stored in the array
    p1.clear();
    p1.add("averylongcategoryname");
    p1.clear();

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Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    p1.add("averylongcategoryname");
    p1.clear();
    p1.add("hi");
    p2.clear();
    p2.add("hi");
    assertEquals(p1.longHashCode(), p2.longHashCode());
    // Being of the same length is obviously not enough to be equal
    p1.clear();
    p1.add("hi");
    p2.clear();
    p2.add("hello");

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Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    // Being of the same length is obviously not enough to be equal
    p1.clear();
    p1.add("hi");
    p2.clear();
    p2.add("hello");
    assertEquals(false, p1.longHashCode()==p2.longHashCode());
    p1.clear();
    p1.add("hi");
    p2.clear();
    p2.add("ho");
    assertEquals(false, p1.longHashCode()==p2.longHashCode());

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Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    assertEquals(false, p1.longHashCode()==p2.longHashCode());
    p1.clear();
    p1.add("hi");
    p2.clear();
    p2.add("ho");
    assertEquals(false, p1.longHashCode()==p2.longHashCode());
  }
  
  @Test 
  public void testLongHashCodePrefix() {
    // First, repeat the tests of testLongHashCode() using longHashCode(-1)

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Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    
    // check that two empty paths are equal, even if they have different
    // capacities:
    CategoryPath p1 = new CategoryPath(0,0);
    CategoryPath p2 = new CategoryPath(1000,300);
    assertEquals(p1.longHashCode(-1), p2.longHashCode(-1));
    // If we make p2 different, it is no longer equals:
    p2.add("hi");
    assertEquals(false, p1.longHashCode(-1)==p2.longHashCode(-1));
    // Build two paths separately, and compare them
    p1.clear();

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Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    CategoryPath p1 = new CategoryPath(0,0);
    CategoryPath p2 = new CategoryPath(1000,300);
    assertEquals(p1.longHashCode(-1), p2.longHashCode(-1));
    // If we make p2 different, it is no longer equals:
    p2.add("hi");
    assertEquals(false, p1.longHashCode(-1)==p2.longHashCode(-1));
    // Build two paths separately, and compare them
    p1.clear();
    p1.add("hello");
    p1.add("world");
    p2.clear();

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Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    p1.add("hello");
    p1.add("world");
    p2.clear();
    p2.add("hello");
    p2.add("world");
    assertEquals(p1.longHashCode(-1), p2.longHashCode(-1));
    // Check that comparison really don't look at old data which might
    // be stored in the array
    p1.clear();
    p1.add("averylongcategoryname");
    p1.clear();

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Examples of org.apache.lucene.facet.taxonomy.CategoryPath.longHashCode()

    p1.add("averylongcategoryname");
    p1.clear();
    p1.add("hi");
    p2.clear();
    p2.add("hi");
    assertEquals(p1.longHashCode(-1), p2.longHashCode(-1));
    // Being of the same length is obviously not enough to be equal
    p1.clear();
    p1.add("hi");
    p2.clear();
    p2.add("hello");

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