Package org.drools.mvel

Class MVELConstraintBuilder

java.lang.Object

org.drools.mvel.MVELConstraintBuilder

All Implemented Interfaces:

Comparable<KieService>, ConstraintBuilder, KieService

public class MVELConstraintBuilder
extends Object
implements ConstraintBuilder

Nested Class Summary

Nested Classes

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

Nested classes/interfaces inherited from interface org.drools.compiler.rule.builder.ConstraintBuilder

ConstraintBuilder.DummyConstraintBuilder, ConstraintBuilder.Holder

Field Summary

Fields

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

Fields inherited from interface org.kie.api.internal.utils.KieService

UNDEFINED

Constructor Summary

Constructors

Constructor	Description
MVELConstraintBuilder()

Method Summary

Modifier and Type	Method	Description
AnalysisResult	analyzeExpression(Class<?> thisClass, String expr)
org.drools.base.rule.QueryArgument	buildExpressionQueryArgument(RuleBuildContext context, List<org.drools.base.rule.Declaration> declarations, String expression)
org.drools.base.rule.constraint.Constraint	buildLiteralConstraint(RuleBuildContext context, org.drools.base.rule.Pattern pattern, org.drools.base.base.ValueType vtype, org.drools.base.rule.accessor.FieldValue field, String expression, String leftValue, String operator, boolean negated, String rightValue, org.drools.base.rule.accessor.ReadAccessor extractor, org.drools.drl.ast.descr.LiteralRestrictionDescr restrictionDescr, Map<String,org.drools.drl.ast.descr.OperatorDescr> aliases)
org.drools.base.rule.constraint.Constraint	buildMvelConstraint(String packageName, String expression, org.drools.base.rule.Declaration[] declarations, EvaluatorWrapper[] operators, RuleBuildContext context, org.drools.base.rule.Declaration[] previousDeclarations, org.drools.base.rule.Declaration[] localDeclarations, org.drools.drl.ast.descr.PredicateDescr predicateDescr, AnalysisResult analysis, boolean isDynamic)
org.drools.base.rule.accessor.ReadAccessor	buildMvelFieldReadAccessor(RuleBuildContext context, org.drools.drl.ast.descr.BaseDescr descr, org.drools.base.rule.Pattern pattern, org.drools.base.base.ObjectType objectType, String fieldName, boolean reportError)
TimerExpression	buildTimerExpression(String expression, RuleBuildContext context)
org.drools.base.rule.constraint.Constraint	buildVariableConstraint(RuleBuildContext context, org.drools.base.rule.Pattern pattern, String expression, org.drools.base.rule.Declaration[] declarations, String leftValue, org.drools.drl.ast.descr.OperatorDescr operatorDescr, String rightValue, org.drools.base.rule.accessor.ReadAccessor extractor, org.drools.base.rule.Declaration requiredDeclaration, org.drools.drl.ast.descr.RelationalExprDescr relDescr, Map<String,org.drools.drl.ast.descr.OperatorDescr> aliases)
DialectConfiguration	createJavaDialectConfiguration(KnowledgeBuilderConfigurationImpl conf)
BeanCreator	createMVELBeanCreator(Map<String,Object> parameters)
DialectConfiguration	createMVELDialectConfiguration(KnowledgeBuilderConfigurationImpl conf)
org.drools.base.rule.accessor.Evaluator	getEvaluator(RuleBuildContext context, org.drools.drl.ast.descr.BaseDescr descr, org.drools.base.base.ValueType valueType, String evaluatorString, boolean isNegated, String parameters, EvaluatorDefinition.Target left, EvaluatorDefinition.Target right)
List<EvaluatorDefinition>	getEvaluatorDefinitions()
org.drools.base.rule.accessor.FieldValue	getMvelFieldValue(RuleBuildContext context, org.drools.base.base.ValueType vtype, String value)
boolean	isMvelOperator(String operator)
protected static String	normalizeMVELLiteralExpression(org.drools.base.base.ValueType vtype, org.drools.base.rule.accessor.FieldValue field, String expr, String leftValue, String operator, String rightValue, boolean negated, org.drools.drl.ast.descr.LiteralRestrictionDescr restrictionDescr)
protected static String	normalizeMVELVariableExpression(String expr, String leftValue, String rightValue, org.drools.drl.ast.descr.RelationalExprDescr relDescr)
void	setExprInputs(RuleBuildContext context, PatternBuilder.ExprBindings descrBranch, Class<?> thisClass, String expr)
boolean	useMvelExpression()
EvaluatorWrapper	wrapEvaluator(org.drools.base.rule.accessor.Evaluator evaluator, org.drools.base.rule.Declaration left, org.drools.base.rule.Declaration right)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.kie.api.internal.utils.KieService

compareTo, servicePriority, serviceTag

Field Details

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 Details

MVELConstraintBuilder

public MVELConstraintBuilder()

Method Details

createJavaDialectConfiguration

public DialectConfiguration createJavaDialectConfiguration(KnowledgeBuilderConfigurationImpl conf)

Specified by:

createJavaDialectConfiguration in interface ConstraintBuilder

createMVELDialectConfiguration

public DialectConfiguration createMVELDialectConfiguration(KnowledgeBuilderConfigurationImpl conf)

Specified by:

createMVELDialectConfiguration in interface ConstraintBuilder

isMvelOperator

public boolean isMvelOperator(String operator)

Specified by:

isMvelOperator in interface ConstraintBuilder

useMvelExpression

public boolean useMvelExpression()

buildVariableConstraint

public org.drools.base.rule.constraint.Constraint buildVariableConstraint(RuleBuildContext context,
 org.drools.base.rule.Pattern pattern,
 String expression,
 org.drools.base.rule.Declaration[] declarations,
 String leftValue,
 org.drools.drl.ast.descr.OperatorDescr operatorDescr,
 String rightValue,
 org.drools.base.rule.accessor.ReadAccessor extractor,
 org.drools.base.rule.Declaration requiredDeclaration,
 org.drools.drl.ast.descr.RelationalExprDescr relDescr,
 Map<String,org.drools.drl.ast.descr.OperatorDescr> aliases)

Specified by:

buildVariableConstraint in interface ConstraintBuilder

buildMvelConstraint

public org.drools.base.rule.constraint.Constraint buildMvelConstraint(String packageName,
 String expression,
 org.drools.base.rule.Declaration[] declarations,
 EvaluatorWrapper[] operators,
 RuleBuildContext context,
 org.drools.base.rule.Declaration[] previousDeclarations,
 org.drools.base.rule.Declaration[] localDeclarations,
 org.drools.drl.ast.descr.PredicateDescr predicateDescr,
 AnalysisResult analysis,
 boolean isDynamic)

Specified by:

buildMvelConstraint in interface ConstraintBuilder

buildLiteralConstraint

public org.drools.base.rule.constraint.Constraint buildLiteralConstraint(RuleBuildContext context,
 org.drools.base.rule.Pattern pattern,
 org.drools.base.base.ValueType vtype,
 org.drools.base.rule.accessor.FieldValue field,
 String expression,
 String leftValue,
 String operator,
 boolean negated,
 String rightValue,
 org.drools.base.rule.accessor.ReadAccessor extractor,
 org.drools.drl.ast.descr.LiteralRestrictionDescr restrictionDescr,
 Map<String,org.drools.drl.ast.descr.OperatorDescr> aliases)

Specified by:

buildLiteralConstraint in interface ConstraintBuilder

normalizeMVELLiteralExpression

protected static String normalizeMVELLiteralExpression(org.drools.base.base.ValueType vtype,
 org.drools.base.rule.accessor.FieldValue field,
 String expr,
 String leftValue,
 String operator,
 String rightValue,
 boolean negated,
 org.drools.drl.ast.descr.LiteralRestrictionDescr restrictionDescr)

normalizeMVELVariableExpression

protected static String normalizeMVELVariableExpression(String expr,
 String leftValue,
 String rightValue,
 org.drools.drl.ast.descr.RelationalExprDescr relDescr)

getEvaluator

public org.drools.base.rule.accessor.Evaluator getEvaluator(RuleBuildContext context,
 org.drools.drl.ast.descr.BaseDescr descr,
 org.drools.base.base.ValueType valueType,
 String evaluatorString,
 boolean isNegated,
 String parameters,
 EvaluatorDefinition.Target left,
 EvaluatorDefinition.Target right)

Specified by:

getEvaluator in interface ConstraintBuilder

wrapEvaluator

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

Specified by:

wrapEvaluator in interface ConstraintBuilder

buildTimerExpression

public TimerExpression buildTimerExpression(String expression,
 RuleBuildContext context)

Specified by:

buildTimerExpression in interface ConstraintBuilder

analyzeExpression

public AnalysisResult analyzeExpression(Class<?> thisClass,
 String expr)

Specified by:

analyzeExpression in interface ConstraintBuilder

buildMvelFieldReadAccessor

public org.drools.base.rule.accessor.ReadAccessor buildMvelFieldReadAccessor(RuleBuildContext context,
 org.drools.drl.ast.descr.BaseDescr descr,
 org.drools.base.rule.Pattern pattern,
 org.drools.base.base.ObjectType objectType,
 String fieldName,
 boolean reportError)

Specified by:

buildMvelFieldReadAccessor in interface ConstraintBuilder

setExprInputs

public void setExprInputs(RuleBuildContext context,
 PatternBuilder.ExprBindings descrBranch,
 Class<?> thisClass,
 String expr)

Specified by:

setExprInputs in interface ConstraintBuilder

getMvelFieldValue

public org.drools.base.rule.accessor.FieldValue getMvelFieldValue(RuleBuildContext context,
 org.drools.base.base.ValueType vtype,
 String value)

Specified by:

getMvelFieldValue in interface ConstraintBuilder

buildExpressionQueryArgument

public org.drools.base.rule.QueryArgument buildExpressionQueryArgument(RuleBuildContext context,
 List<org.drools.base.rule.Declaration> declarations,
 String expression)

Specified by:

buildExpressionQueryArgument in interface ConstraintBuilder

createMVELBeanCreator

public BeanCreator createMVELBeanCreator(Map<String,Object> parameters)

Specified by:

createMVELBeanCreator in interface ConstraintBuilder

getEvaluatorDefinitions

public List<EvaluatorDefinition> getEvaluatorDefinitions()

Specified by:

getEvaluatorDefinitions in interface ConstraintBuilder