Packages

sealed trait ZeroLengthDetector extends Serializable

Rapidly determines if an Infoset Element will have non-zero length when unparsed.

This enables an important optimization for separator suppression.

If by looking at the infoset value/nilled status we can tell whether it would be non-zero length immediately, then we don't need to suspend whether to unparse the separator or not, we just unparse it directly.

Conversely, if we don't know if the value will unparse to zero-length or not, we must use a suspendable unparser for the separator, and that has a lot of overhead. But we avoid this overhead in most cases.

The specific concrete sub-class is selected based on a compile time analysis of whether the element can have zero length at all, and if so, under what conditions.

Linear Supertypes
Serializable, Serializable, AnyRef, Any
Known Subclasses
HexBinaryZeroLengthDetector, NeverZeroLengthDetector, NillableHexBinaryZeroLengthDetector, NillableStringZeroLengthDetector, NillableZeroLengthDetector, NotRepresentedZeroLengthDetector, PossiblyZeroArrayOccurrencesDetector, PossiblyZeroLengthModelGroupDetector, StringZeroLengthDetector
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Abstract Value Members

  1. abstract def isKnownNonZeroLength(diElement: DIElement): Boolean

    Determines if the representation is known for certain to be non-zero length.

    Determines if the representation is known for certain to be non-zero length.

    Used to avoid complexity when unparsing and trailing separator suppression is a possibility.

  2. abstract def isKnownZeroLength(diElement: DIElement): Boolean

    Determines if the representation is known for certain to be zero length.

    Determines if the representation is known for certain to be zero length.

    Used to optimize for dfdl:separatorSuppressionPolicy="anyEmpty".

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
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  2. final def ##(): Int
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  3. final def ==(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def clone(): AnyRef
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    @throws( ... ) @native()
  6. final def eq(arg0: AnyRef): Boolean
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  7. def equals(arg0: Any): Boolean
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  8. def finalize(): Unit
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  9. final def getClass(): Class[_]
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  10. def hashCode(): Int
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    @native()
  11. final def isInstanceOf[T0]: Boolean
    Definition Classes
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  12. def isKnownNonZeroLengthModelGroup: Boolean
  13. def isKnownZeroLengthModelGroup: Boolean
  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
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  15. final def notify(): Unit
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    @native()
  16. final def notifyAll(): Unit
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  17. final def synchronized[T0](arg0: ⇒ T0): T0
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  18. def toString(): String
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  19. final def wait(): Unit
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  20. final def wait(arg0: Long, arg1: Int): Unit
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  21. final def wait(arg0: Long): Unit
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