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trait HashBuilder extends AnyRef

The methods of HashBuilder change its internal state and return this for convenience.

Requirements for all implementations:

For any HashBuilder hb, it is computationally infeasible to find two sequences as1 and as2 of calls to add such that the concatenation of as1 differs from the concatenation as2, yet their computed hashes are the same, i.e., as1.foldLeft(hb)((hb, a) => hb.add(a)).finish is the same as as2.foldLeft(hb)((hb, a) => hb.add(a)).finish.

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Abstract Value Members

  1. abstract def addWithoutLengthPrefix(a: ByteString): HashBuilder.this.type

    Appends a com.google.protobuf.ByteString a to the sequence of bytes to be hashed.

    Appends a com.google.protobuf.ByteString a to the sequence of bytes to be hashed. Use add for com.google.protobuf.ByteStrings of variable length to prevent hash collisions due to concatenation of variable-length strings.

    Document at the call site in production code why it is not necessary to include a length prefix.

    returns

    the updated hash builder

    Exceptions thrown

    java.lang.IllegalStateException if the finish method has already been called on this HashBuilder

  2. abstract def finish(): Hash

    Terminates the building of the hash.

    Terminates the building of the hash. No more additions can be made using HashBuilder.addWithoutLengthPrefix after this method has been called.

    returns

    The hash of the array accumulated so far.

    Exceptions thrown

    java.lang.IllegalStateException if finish had been called before on this HashBuilder

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
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  2. final def ##: Int
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  3. final def ==(arg0: Any): Boolean
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  4. def add(a: Long): HashBuilder.this.type

    Shorthand for addWithoutLengthPrefix(DeterministicEncoding.encodeLong(a))

  5. def add(a: Int): HashBuilder.this.type

    Shorthand for addWithoutLengthPrefix(DeterministicEncoding.encodeInt(a))

  6. def add(a: String): HashBuilder.this.type

    Shorthand for add(ByteString.copyFromUtf8(a))

  7. def add(a: ByteString): HashBuilder.this.type

    Appends the length of a (encoded as fixed length com.google.protobuf.ByteString) as well as a to this builder.

    Appends the length of a (encoded as fixed length com.google.protobuf.ByteString) as well as a to this builder.

    returns

    the updated hash builder

    Exceptions thrown

    java.lang.IllegalStateException if the finish method has already been called on this HashBuilder

  8. def addWithoutLengthPrefix(a: String): HashBuilder.this.type

    Shorthand for addWithoutLengthPrefix(ByteString.copyFromUtf8(a)) Use add for strings of variable length to prevent hash collisions due to concatenation of variable-length strings.

    Shorthand for addWithoutLengthPrefix(ByteString.copyFromUtf8(a)) Use add for strings of variable length to prevent hash collisions due to concatenation of variable-length strings.

    Document at the call site in production code why it is not necessary to include a length prefix.

  9. def addWithoutLengthPrefix(a: Array[Byte]): HashBuilder.this.type

    Shorthand for addWithoutLengthPrefix(ByteString.copyFrom(a))

  10. final def asInstanceOf[T0]: T0
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  11. def clone(): AnyRef
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  12. final def eq(arg0: AnyRef): Boolean
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  13. def equals(arg0: AnyRef): Boolean
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  14. final def getClass(): Class[_ <: AnyRef]
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    @native() @HotSpotIntrinsicCandidate()
  15. def hashCode(): Int
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    @native() @HotSpotIntrinsicCandidate()
  16. final def isInstanceOf[T0]: Boolean
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  17. final def ne(arg0: AnyRef): Boolean
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  18. final def notify(): Unit
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  19. final def notifyAll(): Unit
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  20. final def synchronized[T0](arg0: => T0): T0
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  21. def toString(): String
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  22. final def wait(arg0: Long, arg1: Int): Unit
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    @throws(classOf[java.lang.InterruptedException])
  23. final def wait(arg0: Long): Unit
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  24. final def wait(): Unit
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    @throws(classOf[java.lang.InterruptedException])

Deprecated Value Members

  1. def finalize(): Unit
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    @throws(classOf[java.lang.Throwable]) @Deprecated
    Deprecated

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