public class Permutation
extends java.lang.Object
Constructor and Description |
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Permutation(byte[] enc)
Create a permutation from an encoded permutation.
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Permutation(int n)
Create the identity permutation of the given size.
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Permutation(int[] perm)
Create a permutation using the given permutation vector.
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Permutation(int n,
java.security.SecureRandom sr)
Create a random permutation of the given size.
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Modifier and Type | Method and Description |
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Permutation |
computeInverse()
Compute the inverse permutation P-1.
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boolean |
equals(java.lang.Object other)
checks if given object is equal to this permutation.
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byte[] |
getEncoded()
Encode this permutation as byte array.
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int[] |
getVector() |
int |
hashCode() |
Permutation |
rightMultiply(Permutation p)
Compute the product of this permutation and another permutation.
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java.lang.String |
toString() |
public Permutation(int n)
n
- the size of the permutationpublic Permutation(int[] perm)
perm
- the permutation vectorpublic Permutation(byte[] enc)
enc
- the encoded permutationpublic Permutation(int n, java.security.SecureRandom sr)
n
- the size of the permutationsr
- the source of randomnesspublic byte[] getEncoded()
public int[] getVector()
public Permutation computeInverse()
public Permutation rightMultiply(Permutation p)
p
- the other permutationpublic boolean equals(java.lang.Object other)
The method returns false whenever the given object is not permutation.
equals
in class java.lang.Object
other
- -
permutationpublic java.lang.String toString()
toString
in class java.lang.Object
public int hashCode()
hashCode
in class java.lang.Object