Package org.drools.compiler.rule.builder

Class PatternBuilder

java.lang.Object

org.drools.compiler.rule.builder.PatternBuilder

All Implemented Interfaces:

EngineElementBuilder, RuleConditionBuilder<PatternDescr>

public class PatternBuilder
extends Object
implements RuleConditionBuilder<PatternDescr>

A builder for patterns

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PatternBuilder.ExprBindings

Constructor Summary

Constructors

Constructor	Description
PatternBuilder()

Method Summary

Modifier and Type	Method	Description
RuleConditionElement	build(RuleBuildContext context, PatternDescr descr)
RuleConditionElement	build(RuleBuildContext context, PatternDescr patternDescr, Pattern prefixPattern)	Build a pattern for the given descriptor in the current context and using the given utils object
static AnalysisResult	buildAnalysis(RuleBuildContext context, Pattern pattern, PredicateDescr predicateDescr, Map<String,OperatorDescr> aliases)
protected Constraint	buildConstraintForPattern(RuleBuildContext context, Pattern pattern, RelationalExprDescr relDescr, String expr, String value1, String value2, boolean isConstant, Map<String,OperatorDescr> aliases)
protected Constraint	buildEval(RuleBuildContext context, Pattern pattern, PredicateDescr predicateDescr, Map<String,OperatorDescr> aliases, String expr, boolean isEvalExpression)
protected LiteralRestrictionDescr	buildLiteralRestrictionDescr(RuleBuildContext context, RelationalExprDescr exprDescr, String rightValue, boolean isRightLiteral)
static Map<String,EvaluatorWrapper>	buildOperators(RuleBuildContext context, Pattern pattern, BaseDescr predicateDescr, Map<String,OperatorDescr> aliases)
protected Constraint	buildRelationalExpression(RuleBuildContext context, Pattern pattern, RelationalExprDescr relDescr, String expr, Map<String,OperatorDescr> aliases)
protected void	buildRuleBindings(RuleBuildContext context, PatternDescr patternDescr, Declaration xpathStartDeclaration, Pattern pattern, BindingDescr fieldBindingDescr)
protected void	buildRuleBindings(RuleBuildContext context, PatternDescr patternDescr, Declaration xpathStartDeclaration, Pattern pattern, BindingDescr fieldBindingDescr, TypeDeclaration typeDeclaration)
protected Constraint	createAndBuildPredicate(RuleBuildContext context, Pattern pattern, BaseDescr base, String expr, Map<String,OperatorDescr> aliases)
protected static Declaration	createDeclarationObject(RuleBuildContext context, String identifier, String expr, Pattern pattern)
protected static Declaration	createDeclarationObject(RuleBuildContext context, String identifier, Pattern pattern)	Creates a declaration object for the field identified by the given identifier on the give pattern object
static void	createImplicitBindings(RuleBuildContext context, Pattern pattern, Set<String> unboundIdentifiers, BoundIdentifiers boundIdentifiers, List<Declaration> factDeclarations)
static ReadAccessor	getFieldReadAccessor(RuleBuildContext context, BaseDescr descr, Pattern pattern, String fieldName, AcceptsReadAccessor target, boolean reportError)
static ReadAccessor	getFieldReadAccessor(RuleBuildContext context, BaseDescr descr, Pattern pattern, ObjectType objectType, String fieldName, AcceptsReadAccessor target, boolean reportError)
static EvaluatorWrapper[]	getOperators(Map<String,EvaluatorWrapper> operatorMap)
protected Collection<String>	getSettableProperties(RuleBuildContext context, PatternDescr patternDescr, Pattern pattern)
static Declaration[][]	getUsedDeclarations(RuleBuildContext context, Pattern pattern, AnalysisResult analysis)
boolean	isInternalFact(PatternDescr patternDescr, RuleBuildContext context)
protected boolean	isSimpleExpr(RelationalExprDescr relDescr)
static Collection<String>	lookAheadFieldsOfIdentifier(RuleDescr ruleDescr, PatternDescr patternDescr)
protected ConstraintConnectiveDescr	parseExpression(RuleBuildContext context, PatternDescr patternDescr, BaseDescr original, String expression)
protected void	processAnnotations(RuleBuildContext context, PatternDescr patternDescr, Pattern pattern)
protected Constraint	processAtomicExpression(RuleBuildContext context, Pattern pattern, BaseDescr d, String expr, Map<String,OperatorDescr> aliases)
protected void	processListenedPropertiesAnnotation(RuleBuildContext context, PatternDescr patternDescr, Pattern pattern)
protected void	processMetadataAnnotations(PatternDescr patternDescr, Pattern pattern, org.drools.util.TypeResolver typeResolver)
static void	registerDescrBuildError(RuleBuildContext context, BaseDescr patternDescr, Object object, String error)
static void	registerDescrBuildError(RuleBuildContext context, BaseDescr patternDescr, String error)
static void	registerReadAccessor(RuleBuildContext context, ObjectType objectType, String fieldName, AcceptsReadAccessor target)

Methods inherited from class java.lang.Object

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

Constructor Details

PatternBuilder

public PatternBuilder()

Method Details

build

public RuleConditionElement build(RuleBuildContext context,
 PatternDescr descr)

Specified by:

build in interface RuleConditionBuilder<PatternDescr>

build

public RuleConditionElement build(RuleBuildContext context,
 PatternDescr patternDescr,
 Pattern prefixPattern)

Build a pattern for the given descriptor in the current context and using the given utils object

Specified by:

build in interface RuleConditionBuilder<PatternDescr>

isInternalFact

public boolean isInternalFact(PatternDescr patternDescr,
 RuleBuildContext context)

processAnnotations

protected void processAnnotations(RuleBuildContext context,
 PatternDescr patternDescr,
 Pattern pattern)

processMetadataAnnotations

protected void processMetadataAnnotations(PatternDescr patternDescr,
 Pattern pattern,
 org.drools.util.TypeResolver typeResolver)

processListenedPropertiesAnnotation

protected void processListenedPropertiesAnnotation(RuleBuildContext context,
 PatternDescr patternDescr,
 Pattern pattern)

getSettableProperties

protected Collection<String> getSettableProperties(RuleBuildContext context,
 PatternDescr patternDescr,
 Pattern pattern)

lookAheadFieldsOfIdentifier

public static Collection<String> lookAheadFieldsOfIdentifier(RuleDescr ruleDescr,
 PatternDescr patternDescr)

buildRelationalExpression

protected Constraint buildRelationalExpression(RuleBuildContext context,
 Pattern pattern,
 RelationalExprDescr relDescr,
 String expr,
 Map<String,OperatorDescr> aliases)

buildConstraintForPattern

protected Constraint buildConstraintForPattern(RuleBuildContext context,
 Pattern pattern,
 RelationalExprDescr relDescr,
 String expr,
 String value1,
 String value2,
 boolean isConstant,
 Map<String,OperatorDescr> aliases)

buildLiteralRestrictionDescr

protected LiteralRestrictionDescr buildLiteralRestrictionDescr(RuleBuildContext context,
 RelationalExprDescr exprDescr,
 String rightValue,
 boolean isRightLiteral)

processAtomicExpression

protected Constraint processAtomicExpression(RuleBuildContext context,
 Pattern pattern,
 BaseDescr d,
 String expr,
 Map<String,OperatorDescr> aliases)

isSimpleExpr

protected boolean isSimpleExpr(RelationalExprDescr relDescr)

createAndBuildPredicate

protected Constraint createAndBuildPredicate(RuleBuildContext context,
 Pattern pattern,
 BaseDescr base,
 String expr,
 Map<String,OperatorDescr> aliases)

buildRuleBindings

protected void buildRuleBindings(RuleBuildContext context,
 PatternDescr patternDescr,
 Declaration xpathStartDeclaration,
 Pattern pattern,
 BindingDescr fieldBindingDescr)

buildRuleBindings

protected void buildRuleBindings(RuleBuildContext context,
 PatternDescr patternDescr,
 Declaration xpathStartDeclaration,
 Pattern pattern,
 BindingDescr fieldBindingDescr,
 TypeDeclaration typeDeclaration)

buildEval

protected Constraint buildEval(RuleBuildContext context,
 Pattern pattern,
 PredicateDescr predicateDescr,
 Map<String,OperatorDescr> aliases,
 String expr,
 boolean isEvalExpression)

getOperators

public static EvaluatorWrapper[] getOperators(Map<String,EvaluatorWrapper> operatorMap)

getUsedDeclarations

public static Declaration[][] getUsedDeclarations(RuleBuildContext context,
 Pattern pattern,
 AnalysisResult analysis)

buildAnalysis

public static AnalysisResult buildAnalysis(RuleBuildContext context,
 Pattern pattern,
 PredicateDescr predicateDescr,
 Map<String,OperatorDescr> aliases)

buildOperators

public static Map<String,EvaluatorWrapper> buildOperators(RuleBuildContext context,
 Pattern pattern,
 BaseDescr predicateDescr,
 Map<String,OperatorDescr> aliases)

createImplicitBindings

public static void createImplicitBindings(RuleBuildContext context,
 Pattern pattern,
 Set<String> unboundIdentifiers,
 BoundIdentifiers boundIdentifiers,
 List<Declaration> factDeclarations)

createDeclarationObject

protected static Declaration createDeclarationObject(RuleBuildContext context,
 String identifier,
 Pattern pattern)

Creates a declaration object for the field identified by the given identifier on the give pattern object

createDeclarationObject

protected static Declaration createDeclarationObject(RuleBuildContext context,
 String identifier,
 String expr,
 Pattern pattern)

registerReadAccessor

public static void registerReadAccessor(RuleBuildContext context,
 ObjectType objectType,
 String fieldName,
 AcceptsReadAccessor target)

getFieldReadAccessor

public static ReadAccessor getFieldReadAccessor(RuleBuildContext context,
 BaseDescr descr,
 Pattern pattern,
 String fieldName,
 AcceptsReadAccessor target,
 boolean reportError)

getFieldReadAccessor

public static ReadAccessor getFieldReadAccessor(RuleBuildContext context,
 BaseDescr descr,
 Pattern pattern,
 ObjectType objectType,
 String fieldName,
 AcceptsReadAccessor target,
 boolean reportError)

parseExpression

protected ConstraintConnectiveDescr parseExpression(RuleBuildContext context,
 PatternDescr patternDescr,
 BaseDescr original,
 String expression)

registerDescrBuildError

public static void registerDescrBuildError(RuleBuildContext context,
 BaseDescr patternDescr,
 String error)

registerDescrBuildError

public static void registerDescrBuildError(RuleBuildContext context,
 BaseDescr patternDescr,
 Object object,
 String error)