Package org.eclipse.viatra.query.runtime.rete.recipes

## Interface ExistenceJoinRecipe

- All Superinterfaces:
    `BetaRecipe`, `org.eclipse.emf.ecore.EObject`, `org.eclipse.emf.common.notify.Notifier`, `ReteNodeRecipe`
  All Known Subinterfaces:
    `AntiJoinRecipe`, `SemiJoinRecipe`
  All Known Implementing Classes:
    `AntiJoinRecipeImpl`, `ExistenceJoinRecipeImpl`, `SemiJoinRecipeImpl`

      public interface ExistenceJoinRecipe
      extends BetaRecipe

  A representation of the model object 'Existence Join Recipe'. Existence joins are TODO See http://en.wikipedia.org/wiki/Relational_algebra
  See Also:
    `RecipesPackage.getExistenceJoinRecipe()`
  Generated:
  Model:
    abstract="true"

- - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static java.lang.String` | `copyright`

  - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `int` | `getArity()`

    - ### Methods inherited from interface org.eclipse.viatra.query.runtime.rete.recipes.BetaRecipe

      `getLeftParent, getRightParent, setLeftParent, setRightParent`

    - ### Methods inherited from interface org.eclipse.emf.ecore.EObject

      `eAllContents, eClass, eContainer, eContainingFeature, eContainmentFeature, eContents, eCrossReferences, eGet, eGet, eInvoke, eIsProxy, eIsSet, eResource, eSet, eUnset`

    - ### Methods inherited from interface org.eclipse.emf.common.notify.Notifier

      `eAdapters, eDeliver, eNotify, eSetDeliver`

    - ### Methods inherited from interface org.eclipse.viatra.query.runtime.rete.recipes.ReteNodeRecipe

      `getEquivalenceClassIDs, getTraceInfo, setTraceInfo`

- - ### Field Detail

    - #### copyright

          static final java.lang.String copyright

      See Also:
        Constant Field Values
      Generated:

  - ### Method Detail

    - #### getArity

          int getArity()

      Specified by:
        `getArity` in interface `ReteNodeRecipe`
      Generated:
      Model:
        kind="operation" unique="false"