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java.lang.Object org.apache.hadoop.util.bloom.HashFunction
@InterfaceAudience.Public @InterfaceStability.Stable public final class HashFunction
Implements a hash object that returns a certain number of hashed values.
The general behavior of a key being stored in a filter
,
The general behavior of a filter
Constructor Summary | |
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HashFunction(int maxValue,
int nbHash,
int hashType)
Constructor. |
Method Summary | |
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void |
clear()
Clears this hash function. |
int[] |
hash(org.apache.hadoop.util.bloom.Key k)
Hashes a specified key into several integers. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public HashFunction(int maxValue, int nbHash, int hashType)
Builds a hash function that must obey to a given maximum number of returned values and a highest value.
maxValue
- The maximum highest returned value.nbHash
- The number of resulting hashed values.hashType
- type of the hashing function (see Hash
).Method Detail |
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public void clear()
public int[] hash(org.apache.hadoop.util.bloom.Key k)
k
- The specified key.
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