org.eclipse.incquery.runtime.matchers.psystem

Interface PConstraint

All Known Subinterfaces:

ITypeConstraint, ITypeInfoProviderConstraint

All Known Implementing Classes:

BasePConstraint, BaseTypeSafeConstraint, BinaryTransitiveClosure, ConstantValue, DeferredPConstraint, EnumerablePConstraint, Equality, ExportedParameter, ExpressionEvaluation, Inequality, KeyedEnumerablePConstraint, NegativePatternCall, PatternCallBasedDeferred, PatternMatchCounter, PositivePatternCall, TypeConstraint, TypeFilterConstraint, VariableDeferredPConstraint

public interface PConstraint

Author:

Gabor Bergmann

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	PConstraint.CompareByMonotonousID Compares by getMonotonousID()

Method Summary

Modifier and Type	Method and Description
void	checkSanity()
void	delete()
java.util.Set<PVariable>	getAffectedVariables() All variables affected by this constraint.
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.Map<java.util.Set<PVariable>,java.util.Set<PVariable>>	getFunctionalDependencies(IQueryMetaContext context) A (preferably minimal) cover of known functional dependencies between variables.
int	getMonotonousID() Returns an integer ID that is guaranteed to increase strictly monotonously for constraints within a pBody.
void	replaceVariable(PVariable obsolete, PVariable replacement)

Method Detail

getAffectedVariables

java.util.Set<PVariable> getAffectedVariables()

All variables affected by this constraint.

getDeducedVariables

java.util.Set<PVariable> getDeducedVariables()

The set of variables whose potential values can be enumerated (once all non-deduced variables have known values).

getFunctionalDependencies

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

A (preferably minimal) cover of known functional dependencies between variables.

Returns:

non-trivial functional dependencies in the form of {variables} --> {variables}, where dependencies with the same lhs are unified.

replaceVariable

void replaceVariable(PVariable obsolete,
                     PVariable replacement)

delete

void delete()

checkSanity

void checkSanity()
          throws QueryProcessingException

Throws:

QueryProcessingException

getMonotonousID

int getMonotonousID()

Returns an integer ID that is guaranteed to increase strictly monotonously for constraints within a pBody.