Package org.drools.mvel

Class MVELConstraintBuilder

java.lang.Object

org.drools.mvel.MVELConstraintBuilder

All Implemented Interfaces:

org.drools.compiler.rule.builder.ConstraintBuilder

public class MVELConstraintBuilder
extends Object
implements org.drools.compiler.rule.builder.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

org.drools.compiler.rule.builder.ConstraintBuilder.DummyConstraintBuilder, org.drools.compiler.rule.builder.ConstraintBuilder.Holder

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
MVELConstraintBuilder()

Method Summary

Modifier and Type	Method	Description
org.drools.compiler.compiler.AnalysisResult	analyzeExpression(Class<?> thisClass, String expr)
org.drools.core.rule.QueryArgument	buildExpressionQueryArgument(org.drools.compiler.rule.builder.RuleBuildContext context, List<org.drools.core.rule.Declaration> declarations, String expression)
org.drools.core.spi.Constraint	buildLiteralConstraint(org.drools.compiler.rule.builder.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, boolean negated, String rightValue, org.drools.core.spi.InternalReadAccessor extractor, org.drools.compiler.lang.descr.LiteralRestrictionDescr restrictionDescr, Map<String,org.drools.compiler.lang.descr.OperatorDescr> aliases)
org.drools.core.spi.Constraint	buildMvelConstraint(String packageName, String expression, org.drools.core.rule.Declaration[] declarations, org.drools.core.base.EvaluatorWrapper[] operators, org.drools.compiler.rule.builder.RuleBuildContext context, org.drools.core.rule.Declaration[] previousDeclarations, org.drools.core.rule.Declaration[] localDeclarations, org.drools.compiler.lang.descr.PredicateDescr predicateDescr, org.drools.compiler.compiler.AnalysisResult analysis, boolean isDynamic)
org.drools.core.spi.InternalReadAccessor	buildMvelFieldReadAccessor(org.drools.compiler.rule.builder.RuleBuildContext context, org.drools.compiler.lang.descr.BaseDescr descr, org.drools.core.rule.Pattern pattern, org.drools.core.spi.ObjectType objectType, String fieldName, boolean reportError)
org.drools.core.time.TimerExpression	buildTimerExpression(String expression, org.drools.compiler.rule.builder.RuleBuildContext context)
org.drools.core.spi.Constraint	buildVariableConstraint(org.drools.compiler.rule.builder.RuleBuildContext context, org.drools.core.rule.Pattern pattern, String expression, org.drools.core.rule.Declaration[] declarations, String leftValue, org.drools.compiler.lang.descr.OperatorDescr operatorDescr, String rightValue, org.drools.core.spi.InternalReadAccessor extractor, org.drools.core.rule.Declaration requiredDeclaration, org.drools.compiler.lang.descr.RelationalExprDescr relDescr, Map<String,org.drools.compiler.lang.descr.OperatorDescr> aliases)
org.drools.compiler.compiler.DialectConfiguration	createJavaDialectConfiguration()
org.drools.compiler.kie.util.BeanCreator	createMVELBeanCreator(Map<String,Object> parameters)
org.drools.compiler.compiler.DialectConfiguration	createMVELDialectConfiguration()
org.drools.core.spi.Evaluator	getEvaluator(org.drools.compiler.rule.builder.RuleBuildContext context, org.drools.compiler.lang.descr.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)
org.drools.core.spi.FieldValue	getMvelFieldValue(org.drools.compiler.rule.builder.RuleBuildContext context, org.drools.core.base.ValueType vtype, String value)
boolean	isMvelOperator(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, boolean negated, org.drools.compiler.lang.descr.LiteralRestrictionDescr restrictionDescr)
protected static String	normalizeMVELVariableExpression(String expr, String leftValue, String rightValue, org.drools.compiler.lang.descr.RelationalExprDescr relDescr)
protected static String	resolveUnificationAmbiguity(String expr, org.drools.core.rule.Declaration[] declrations, String leftValue, String rightValue)
void	setExprInputs(org.drools.compiler.rule.builder.RuleBuildContext context, org.drools.compiler.rule.builder.PatternBuilder.ExprBindings descrBranch, Class<?> thisClass, String expr)
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

createJavaDialectConfiguration

public org.drools.compiler.compiler.DialectConfiguration createJavaDialectConfiguration()

Specified by:

createJavaDialectConfiguration in interface org.drools.compiler.rule.builder.ConstraintBuilder

createMVELDialectConfiguration

public org.drools.compiler.compiler.DialectConfiguration createMVELDialectConfiguration()

Specified by:

createMVELDialectConfiguration in interface org.drools.compiler.rule.builder.ConstraintBuilder

isMvelOperator

public boolean isMvelOperator(String operator)

Specified by:

isMvelOperator in interface org.drools.compiler.rule.builder.ConstraintBuilder

useMvelExpression

public boolean useMvelExpression()

buildVariableConstraint

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

Specified by:

buildVariableConstraint in interface org.drools.compiler.rule.builder.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.compiler.rule.builder.RuleBuildContext context,
                                                          org.drools.core.rule.Declaration[] previousDeclarations,
                                                          org.drools.core.rule.Declaration[] localDeclarations,
                                                          org.drools.compiler.lang.descr.PredicateDescr predicateDescr,
                                                          org.drools.compiler.compiler.AnalysisResult analysis,
                                                          boolean isDynamic)

Specified by:

buildMvelConstraint in interface org.drools.compiler.rule.builder.ConstraintBuilder

buildLiteralConstraint

public org.drools.core.spi.Constraint buildLiteralConstraint(org.drools.compiler.rule.builder.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,
                                                             boolean negated,
                                                             String rightValue,
                                                             org.drools.core.spi.InternalReadAccessor extractor,
                                                             org.drools.compiler.lang.descr.LiteralRestrictionDescr restrictionDescr,
                                                             Map<String,org.drools.compiler.lang.descr.OperatorDescr> aliases)

Specified by:

buildLiteralConstraint in interface org.drools.compiler.rule.builder.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,
                                                       boolean negated,
                                                       org.drools.compiler.lang.descr.LiteralRestrictionDescr restrictionDescr)

normalizeMVELVariableExpression

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

getEvaluator

public org.drools.core.spi.Evaluator getEvaluator(org.drools.compiler.rule.builder.RuleBuildContext context,
                                                  org.drools.compiler.lang.descr.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 org.drools.compiler.rule.builder.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 org.drools.compiler.rule.builder.ConstraintBuilder

buildTimerExpression

public org.drools.core.time.TimerExpression buildTimerExpression(String expression,
                                                                 org.drools.compiler.rule.builder.RuleBuildContext context)

Specified by:

buildTimerExpression in interface org.drools.compiler.rule.builder.ConstraintBuilder

analyzeExpression

public org.drools.compiler.compiler.AnalysisResult analyzeExpression(Class<?> thisClass,
                                                                     String expr)

Specified by:

analyzeExpression in interface org.drools.compiler.rule.builder.ConstraintBuilder

buildMvelFieldReadAccessor

public org.drools.core.spi.InternalReadAccessor buildMvelFieldReadAccessor(org.drools.compiler.rule.builder.RuleBuildContext context,
                                                                           org.drools.compiler.lang.descr.BaseDescr descr,
                                                                           org.drools.core.rule.Pattern pattern,
                                                                           org.drools.core.spi.ObjectType objectType,
                                                                           String fieldName,
                                                                           boolean reportError)

Specified by:

buildMvelFieldReadAccessor in interface org.drools.compiler.rule.builder.ConstraintBuilder

setExprInputs

public void setExprInputs(org.drools.compiler.rule.builder.RuleBuildContext context,
                          org.drools.compiler.rule.builder.PatternBuilder.ExprBindings descrBranch,
                          Class<?> thisClass,
                          String expr)

Specified by:

setExprInputs in interface org.drools.compiler.rule.builder.ConstraintBuilder

getMvelFieldValue

public org.drools.core.spi.FieldValue getMvelFieldValue(org.drools.compiler.rule.builder.RuleBuildContext context,
                                                        org.drools.core.base.ValueType vtype,
                                                        String value)

Specified by:

getMvelFieldValue in interface org.drools.compiler.rule.builder.ConstraintBuilder

buildExpressionQueryArgument

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

Specified by:

buildExpressionQueryArgument in interface org.drools.compiler.rule.builder.ConstraintBuilder

createMVELBeanCreator

public org.drools.compiler.kie.util.BeanCreator createMVELBeanCreator(Map<String,Object> parameters)

Specified by:

createMVELBeanCreator in interface org.drools.compiler.rule.builder.ConstraintBuilder