org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred

## Class TypeFilterConstraint

- java.lang.Object
- - org.eclipse.viatra.query.runtime.matchers.psystem.BasePConstraint
  - - org.eclipse.viatra.query.runtime.matchers.psystem.DeferredPConstraint
    - - org.eclipse.viatra.query.runtime.matchers.psystem.VariableDeferredPConstraint
      - - org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.TypeFilterConstraint

- All Implemented Interfaces:
    ITypeConstraint, ITypeInfoProviderConstraint, PConstraint, PTraceable

      public class TypeFilterConstraint
      extends VariableDeferredPConstraint
      implements ITypeConstraint

  Represents a non-enumerable type constraint that asserts that values substituted for the given tuple of variables form a tuple that belongs to a (typically non-enumerable) extensional relation identified by an `IInputKey`.

  The InputKey is typically not enumerable. If it is enumerable, use `TypeConstraint` instead, so that the PConstraint carries over the property of enumerability.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.eclipse.viatra.query.runtime.matchers.psystem.ITypeConstraint

      `ITypeConstraint.TypeConstraintUtil`

    - ### Nested classes/interfaces inherited from interface org.eclipse.viatra.query.runtime.matchers.psystem.PConstraint

      `PConstraint.CompareByMonotonousID`

  - ### Field Summary

    - ### Fields inherited from class org.eclipse.viatra.query.runtime.matchers.psystem.BasePConstraint

      `pBody`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `TypeFilterConstraint(PBody pBody, Tuple variablesTuple, IInputKey inputKey)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected void` | `doReplaceVariable(PVariable obsolete, PVariable replacement)`
    `java.util.Set<PVariable>` | `getDeducedVariables()` The set of variables whose potential values can be enumerated (once all non-deduced variables have known values).
    `java.util.Set<PVariable>` | `getDeferringVariables()`
    `TypeJudgement` | `getEquivalentJudgement()`
    `java.util.Map<java.util.Set<PVariable>,java.util.Set<PVariable>>` | `getFunctionalDependencies(IQueryMetaContext context)` A (preferably minimal) cover of known functional dependencies between variables.
    `java.util.Set<TypeJudgement>` | `getImpliedJudgements(IQueryMetaContext context)` Returns type information implied by this constraint.
    `IInputKey` | `getInputKey()`
    `Tuple` | `getVariablesTuple()`
    `protected java.lang.String` | `toStringRest()`

    - ### Methods inherited from class org.eclipse.viatra.query.runtime.matchers.psystem.VariableDeferredPConstraint

      `isReadyAt`

    - ### Methods inherited from class org.eclipse.viatra.query.runtime.matchers.psystem.BasePConstraint

      `checkSanity, delete, getAffectedVariables, getMonotonousID, getPSystem, replaceVariable, toString`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface org.eclipse.viatra.query.runtime.matchers.psystem.PConstraint

      `checkSanity, delete, getAffectedVariables, getMonotonousID, replaceVariable`

- - ### Constructor Detail

    - #### TypeFilterConstraint

          public TypeFilterConstraint(PBody pBody,
                                      Tuple variablesTuple,
                                      IInputKey inputKey)

  - ### Method Detail

    - #### getVariablesTuple

          public Tuple getVariablesTuple()

    - #### getInputKey

          public IInputKey getInputKey()

    - #### getEquivalentJudgement

          public TypeJudgement getEquivalentJudgement()

      Specified by:
        `getEquivalentJudgement` in interface `ITypeConstraint`

    - #### doReplaceVariable

          protected void doReplaceVariable(PVariable obsolete,
                                           PVariable replacement)

      Specified by:
        `doReplaceVariable` in class `BasePConstraint`

    - #### getImpliedJudgements

          public java.util.Set<TypeJudgement> getImpliedJudgements(IQueryMetaContext context)

      Description copied from interface: `ITypeInfoProviderConstraint`
      Returns type information implied by this constraint.
      Specified by:
        `getImpliedJudgements` in interface `ITypeInfoProviderConstraint`

    - #### getDeducedVariables

          public java.util.Set<PVariable> getDeducedVariables()

      Description copied from interface: `PConstraint`
      The set of variables whose potential values can be enumerated (once all non-deduced variables have known values).
      Specified by:
        `getDeducedVariables` in interface `PConstraint`

    - #### getDeferringVariables

          public java.util.Set<PVariable> getDeferringVariables()

      Specified by:
        `getDeferringVariables` in class `VariableDeferredPConstraint`

    - #### toStringRest

          protected java.lang.String toStringRest()

      Specified by:
        `toStringRest` in class `BasePConstraint`

    - #### getFunctionalDependencies

          public java.util.Map<java.util.Set<PVariable>,java.util.Set<PVariable>> getFunctionalDependencies(IQueryMetaContext context)

      Description copied from interface: `PConstraint`
      A (preferably minimal) cover of known functional dependencies between variables.
      Specified by:
        `getFunctionalDependencies` in interface `PConstraint`
      Overrides:
        `getFunctionalDependencies` in class `BasePConstraint`
      Returns:
        non-trivial functional dependencies in the form of {variables} --> {variables}, where dependencies with the same lhs are unified.