org.drools.compiler.rule.builder

Class MVELConstraintBuilder

java.lang.Object

org.drools.compiler.rule.builder.MVELConstraintBuilder

All Implemented Interfaces:

ConstraintBuilder

public class MVELConstraintBuilder
extends Object
implements ConstraintBuilder

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MVELConstraintBuilder.BooleanConversionHandler
static class	MVELConstraintBuilder.StringCoercionCompatibilityEvaluator

Field Summary

Fields

Modifier and Type	Field and Description
protected static Set<String>	MVEL_OPERATORS
static boolean	USE_MVEL_EXPRESSION

Constructor Summary

Constructors

Constructor and Description
MVELConstraintBuilder()

Method Summary

Modifier and Type	Method and Description
org.drools.core.base.mvel.MVELCompilationUnit	buildCompilationUnit(RuleBuildContext context, org.drools.core.rule.Declaration[] previousDeclarations, org.drools.core.rule.Declaration[] localDeclarations, PredicateDescr predicateDescr, AnalysisResult analysis)
org.drools.core.base.mvel.MVELCompilationUnit	buildCompilationUnit(RuleBuildContext context, org.drools.core.rule.Pattern pattern, String expression, Map<String,OperatorDescr> aliases)
org.drools.core.spi.Constraint	buildLiteralConstraint(RuleBuildContext context, org.drools.core.rule.Pattern pattern, org.drools.core.base.ValueType vtype, org.drools.core.spi.FieldValue field, String expression, String leftValue, String operator, String rightValue, org.drools.core.spi.InternalReadAccessor extractor, LiteralRestrictionDescr restrictionDescr, Map<String,OperatorDescr> aliases)
org.drools.core.spi.Evaluator	buildLiteralEvaluator(RuleBuildContext context, org.drools.core.spi.InternalReadAccessor extractor, LiteralRestrictionDescr literalRestrictionDescr, org.drools.core.base.ValueType vtype)
org.drools.core.spi.Constraint	buildMvelConstraint(Collection<String> packageNames, String expression, org.drools.core.rule.Declaration[] declarations, org.drools.core.base.EvaluatorWrapper[] operators, org.drools.core.base.mvel.MVELCompilationUnit compilationUnit, org.drools.core.util.index.IndexUtil.ConstraintType constraintType, org.drools.core.rule.Declaration indexingDeclaration, org.drools.core.spi.InternalReadAccessor extractor, boolean isUnification)
org.drools.core.spi.Constraint	buildMvelConstraint(String packageName, String expression, org.drools.core.rule.Declaration[] declarations, org.drools.core.base.EvaluatorWrapper[] operators, org.drools.core.base.mvel.MVELCompilationUnit compilationUnit, boolean isDynamic)
org.drools.core.spi.Constraint	buildVariableConstraint(RuleBuildContext context, org.drools.core.rule.Pattern pattern, String expression, org.drools.core.rule.Declaration[] declarations, String leftValue, OperatorDescr operatorDescr, String rightValue, org.drools.core.spi.InternalReadAccessor extractor, org.drools.core.rule.Declaration requiredDeclaration, RelationalExprDescr relDescr, Map<String,OperatorDescr> aliases)
org.drools.core.spi.Evaluator	getEvaluator(RuleBuildContext context, BaseDescr descr, org.drools.core.base.ValueType valueType, String evaluatorString, boolean isNegated, String parameters, org.drools.core.base.evaluators.EvaluatorDefinition.Target left, org.drools.core.base.evaluators.EvaluatorDefinition.Target right)
protected static String	getNormalizeDate(org.drools.core.spi.FieldValue field)
org.drools.core.base.evaluators.EvaluatorDefinition.Target	getRightTarget(org.drools.core.spi.InternalReadAccessor extractor)
boolean	isMvelOperator(String operator)
protected static String	normalizeEmptyKeyword(String expr, String operator)
protected static String	normalizeMVELLiteralExpression(org.drools.core.base.ValueType vtype, org.drools.core.spi.FieldValue field, String expr, String leftValue, String operator, String rightValue, LiteralRestrictionDescr restrictionDescr)
protected static String	normalizeMVELVariableExpression(String expr, String leftValue, String rightValue, RelationalExprDescr relDescr)
protected static String	normalizeStringOperator(String leftValue, String rightValue, LiteralRestrictionDescr restrictionDescr)
protected static String	resolveUnificationAmbiguity(String expr, org.drools.core.rule.Declaration[] declrations, String leftValue, String rightValue)
boolean	useMvelExpression()
org.drools.core.base.EvaluatorWrapper	wrapEvaluator(org.drools.core.spi.Evaluator evaluator, org.drools.core.rule.Declaration left, org.drools.core.rule.Declaration right)

Methods inherited from class java.lang.Object

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

Field Detail

USE_MVEL_EXPRESSION

public static final boolean USE_MVEL_EXPRESSION

See Also:

Constant Field Values

MVEL_OPERATORS

protected static final Set<String> MVEL_OPERATORS

Constructor Detail

MVELConstraintBuilder

public MVELConstraintBuilder()

Method Detail

isMvelOperator

public boolean isMvelOperator(String operator)

Specified by:

isMvelOperator in interface ConstraintBuilder

useMvelExpression

public boolean useMvelExpression()

buildVariableConstraint

public org.drools.core.spi.Constraint buildVariableConstraint(RuleBuildContext context,
                                                              org.drools.core.rule.Pattern pattern,
                                                              String expression,
                                                              org.drools.core.rule.Declaration[] declarations,
                                                              String leftValue,
                                                              OperatorDescr operatorDescr,
                                                              String rightValue,
                                                              org.drools.core.spi.InternalReadAccessor extractor,
                                                              org.drools.core.rule.Declaration requiredDeclaration,
                                                              RelationalExprDescr relDescr,
                                                              Map<String,OperatorDescr> aliases)

Specified by:

buildVariableConstraint in interface ConstraintBuilder

buildMvelConstraint

public org.drools.core.spi.Constraint buildMvelConstraint(String packageName,
                                                          String expression,
                                                          org.drools.core.rule.Declaration[] declarations,
                                                          org.drools.core.base.EvaluatorWrapper[] operators,
                                                          org.drools.core.base.mvel.MVELCompilationUnit compilationUnit,
                                                          boolean isDynamic)

Specified by:

buildMvelConstraint in interface ConstraintBuilder

buildMvelConstraint

public org.drools.core.spi.Constraint buildMvelConstraint(Collection<String> packageNames,
                                                          String expression,
                                                          org.drools.core.rule.Declaration[] declarations,
                                                          org.drools.core.base.EvaluatorWrapper[] operators,
                                                          org.drools.core.base.mvel.MVELCompilationUnit compilationUnit,
                                                          org.drools.core.util.index.IndexUtil.ConstraintType constraintType,
                                                          org.drools.core.rule.Declaration indexingDeclaration,
                                                          org.drools.core.spi.InternalReadAccessor extractor,
                                                          boolean isUnification)

Specified by:

buildMvelConstraint in interface ConstraintBuilder

buildLiteralConstraint

public org.drools.core.spi.Constraint buildLiteralConstraint(RuleBuildContext context,
                                                             org.drools.core.rule.Pattern pattern,
                                                             org.drools.core.base.ValueType vtype,
                                                             org.drools.core.spi.FieldValue field,
                                                             String expression,
                                                             String leftValue,
                                                             String operator,
                                                             String rightValue,
                                                             org.drools.core.spi.InternalReadAccessor extractor,
                                                             LiteralRestrictionDescr restrictionDescr,
                                                             Map<String,OperatorDescr> aliases)

Specified by:

buildLiteralConstraint in interface ConstraintBuilder

resolveUnificationAmbiguity

protected static String resolveUnificationAmbiguity(String expr,
                                                    org.drools.core.rule.Declaration[] declrations,
                                                    String leftValue,
                                                    String rightValue)

normalizeMVELLiteralExpression

protected static String normalizeMVELLiteralExpression(org.drools.core.base.ValueType vtype,
                                                       org.drools.core.spi.FieldValue field,
                                                       String expr,
                                                       String leftValue,
                                                       String operator,
                                                       String rightValue,
                                                       LiteralRestrictionDescr restrictionDescr)

getNormalizeDate

protected static String getNormalizeDate(org.drools.core.spi.FieldValue field)

normalizeStringOperator

protected static String normalizeStringOperator(String leftValue,
                                                String rightValue,
                                                LiteralRestrictionDescr restrictionDescr)

normalizeEmptyKeyword

protected static String normalizeEmptyKeyword(String expr,
                                              String operator)

normalizeMVELVariableExpression

protected static String normalizeMVELVariableExpression(String expr,
                                                        String leftValue,
                                                        String rightValue,
                                                        RelationalExprDescr relDescr)

buildLiteralEvaluator

public org.drools.core.spi.Evaluator buildLiteralEvaluator(RuleBuildContext context,
                                                           org.drools.core.spi.InternalReadAccessor extractor,
                                                           LiteralRestrictionDescr literalRestrictionDescr,
                                                           org.drools.core.base.ValueType vtype)

Specified by:

buildLiteralEvaluator in interface ConstraintBuilder

getRightTarget

public org.drools.core.base.evaluators.EvaluatorDefinition.Target getRightTarget(org.drools.core.spi.InternalReadAccessor extractor)

Specified by:

getRightTarget in interface ConstraintBuilder

getEvaluator

public org.drools.core.spi.Evaluator getEvaluator(RuleBuildContext context,
                                                  BaseDescr descr,
                                                  org.drools.core.base.ValueType valueType,
                                                  String evaluatorString,
                                                  boolean isNegated,
                                                  String parameters,
                                                  org.drools.core.base.evaluators.EvaluatorDefinition.Target left,
                                                  org.drools.core.base.evaluators.EvaluatorDefinition.Target right)

Specified by:

getEvaluator in interface ConstraintBuilder

wrapEvaluator

public org.drools.core.base.EvaluatorWrapper wrapEvaluator(org.drools.core.spi.Evaluator evaluator,
                                                           org.drools.core.rule.Declaration left,
                                                           org.drools.core.rule.Declaration right)

Specified by:

wrapEvaluator in interface ConstraintBuilder

buildCompilationUnit

public org.drools.core.base.mvel.MVELCompilationUnit buildCompilationUnit(RuleBuildContext context,
                                                                          org.drools.core.rule.Pattern pattern,
                                                                          String expression,
                                                                          Map<String,OperatorDescr> aliases)

Specified by:

buildCompilationUnit in interface ConstraintBuilder

buildCompilationUnit

public org.drools.core.base.mvel.MVELCompilationUnit buildCompilationUnit(RuleBuildContext context,
                                                                          org.drools.core.rule.Declaration[] previousDeclarations,
                                                                          org.drools.core.rule.Declaration[] localDeclarations,
                                                                          PredicateDescr predicateDescr,
                                                                          AnalysisResult analysis)

Specified by:

buildCompilationUnit in interface ConstraintBuilder