org.eclipse.incquery.runtime.rete.construction.plancompiler

Class CompilerHelper

java.lang.Object

org.eclipse.incquery.runtime.rete.construction.plancompiler.CompilerHelper

public class CompilerHelper
extends java.lang.Object

Author:

Bergmann Gabor

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CompilerHelper.JoinHelper Calculated index mappings for a join, based on the common variables of the two parent subplans.

Constructor Summary

Constructors

Constructor and Description
CompilerHelper()

Method Summary

Modifier and Type	Method and Description
static PlanningTrace	checkAndTrimEqualVariables(SubPlan plan, PlanningTrace coreTrace) Makes sure that all variables in the tuple are different so that it can be used as CompiledSubPlan.
static java.util.List<PVariable>	convertVariablesTuple(EnumerablePConstraint constraint) Extracts the variable list representation of the variables tuple.
static java.util.List<PVariable>	convertVariablesTuple(Tuple variablesTuple) Extracts the variable list representation of the variables tuple.
static RecipeTraceInfo	makeIndexerTrace(SubPlan planToCompile, PlanningTrace parentTrace, TupleMask mask) Returns a compiled indexer trace according to a mask
static Mask	makeProjectionMask(PlanningTrace compiledParent, java.lang.Iterable<PVariable> projectedVariables)
static CompiledQuery	makeQueryTrace(PQuery query, java.util.Collection<RecipeTraceInfo> bodyFinalTraces, java.util.Collection<ReteNodeRecipe> bodyFinalRecipes) Creates a recipe for a production node and the corresponding trace.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CompilerHelper

public CompilerHelper()

Method Detail

checkAndTrimEqualVariables

public static PlanningTrace checkAndTrimEqualVariables(SubPlan plan,
                                                       PlanningTrace coreTrace)

Makes sure that all variables in the tuple are different so that it can be used as CompiledSubPlan. If a variable occurs multiple times, equality checks are applied and then the results are trimmed so that duplicates are hidden. If no manipulation is necessary, the original trace is returned.

to be used whenever a constraint introduces new variables.

convertVariablesTuple

public static java.util.List<PVariable> convertVariablesTuple(EnumerablePConstraint constraint)

Extracts the variable list representation of the variables tuple.

convertVariablesTuple

public static java.util.List<PVariable> convertVariablesTuple(Tuple variablesTuple)

Extracts the variable list representation of the variables tuple.

makeIndexerTrace

public static RecipeTraceInfo makeIndexerTrace(SubPlan planToCompile,
                                               PlanningTrace parentTrace,
                                               TupleMask mask)

Returns a compiled indexer trace according to a mask

makeProjectionMask

public static Mask makeProjectionMask(PlanningTrace compiledParent,
                                      java.lang.Iterable<PVariable> projectedVariables)

makeQueryTrace

public static CompiledQuery makeQueryTrace(PQuery query,
                                           java.util.Collection<RecipeTraceInfo> bodyFinalTraces,
                                           java.util.Collection<ReteNodeRecipe> bodyFinalRecipes)

Creates a recipe for a production node and the corresponding trace.