Class

org.apache.daffodil.processors

VariableMap

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class VariableMap extends Serializable

Pure functional data structure for implementing DFDL's variables.

Key concepts: DFDL variables are single-assignment. Once they have been set, they may not be set again. Furthermore, they have default values, and if the default value has been read, then they may not subsequently be set.

These constraints insure that the variables do NOT become a sneaky way to get generalized accumulators and hence turing-complete semantics (and complexity) into designing and debugging DFDL schemas. They also allow for parallel implementations since order of evaluation does not matter.

The DPath implementation must be made to implement the no-set-after-default-value-has-been-read behavior. This requires that reading the variables causes a state transition.

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Instance Constructors

  1. new VariableMap(topLevelVRDs: Seq[VariableRuntimeData] = Nil)

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Value Members

  1. final def !=(arg0: Any): Boolean

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    AnyRef → Any

  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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    Attributes
    protected[java.lang]
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    @throws( ... )

  6. lazy val context: Nothing

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  7. final def eq(arg0: AnyRef): Boolean

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  8. def equals(arg0: Any): Boolean

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  9. def finalize(): Unit

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    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )

  10. def find(qName: GlobalQName): Option[Variable]

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  11. final def getClass(): Class[_]

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  12. def getVariableBindings(qn: GlobalQName): List[List[Variable]]

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    For testing mostly.

  13. def getVariableRuntimeData(qName: GlobalQName): Option[VariableRuntimeData]

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  14. def hashCode(): Int

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  15. final def isInstanceOf[T0]: Boolean

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  16. final def ne(arg0: AnyRef): Boolean

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  17. final def notify(): Unit

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  18. final def notifyAll(): Unit

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  19. def readVariable(vrd: VariableRuntimeData, referringContext: ThrowsSDE): (AnyRef, VariableMap)

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    Returns the value of a variable, constructing also a modified variable map which shows that the variable has been read (state VariableRead), when the variable hadn't previously been read yet.

  20. def setExtVariable(varQName: GlobalQName, newValue: Any, referringContext: ThrowsSDE): VariableMap

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    Assigns a variable, returning a new VariableMap which shows the state of the variable.

  21. def setVariable(vrd: VariableRuntimeData, newValue: Any, referringContext: ThrowsSDE, pstate: ParseOrUnparseState): VariableMap

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    Assigns a variable, returning a new VariableMap which shows the state of the variable.

  22. final def synchronized[T0](arg0: ⇒ T0): T0

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  23. def toString(): String

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    VariableMap → AnyRef → Any

  24. final def wait(): Unit

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    @throws( ... )

  25. final def wait(arg0: Long, arg1: Int): Unit

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    @throws( ... )

  26. final def wait(arg0: Long): Unit

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Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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