com.espertech.esper.filter
Class FilterSpecCompiler

java.lang.Object
  com.espertech.esper.filter.FilterSpecCompiler

public final class FilterSpecCompiler
extends java.lang.Object

Helper to compile (validate and optimize) filter expressions as used in pattern and filter-based streams.

Field Summary

static java.lang.String

PROPERTY_NAME_BOOLEAN_EXPRESSION Assigned for filter parameters that are based on boolean expression and not on any particular property name.

Constructor Summary

FilterSpecCompiler()

Method Summary

static FilterSpecCompiled	build(java.util.List<ExprNode> validatedNodes, EventType eventType, java.lang.String eventTypeName, PropertyEvalSpec optionalPropertyEvalSpec, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes, StreamTypeService streamTypeService, java.lang.String optionalStreamName, StatementContext stmtContext, java.util.Collection<java.lang.Integer> assignedTypeNumberStack)
static FilterSpecCompiled	buildNoStmtCtx(java.util.List<ExprNode> validatedFilterNodes, EventType eventType, java.lang.String eventTypeName, PropertyEvalSpec optionalPropertyEvalSpec, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes, StreamTypeService streamTypeService, java.lang.String optionalStreamName, java.util.Collection<java.lang.Integer> assignedTypeNumberStack, ExprEvaluatorContext exprEvaluatorContext, java.lang.String statementId, java.lang.String statementName, java.lang.annotation.Annotation[] annotations, ContextDescriptor contextDescriptor, MethodResolutionService methodResolutionService, EventAdapterService eventAdapterService, TimeProvider timeProvider, VariableService variableService, TableService tableService, ConfigurationInformation configurationInformation, NamedWindowService namedWindowService)
static FilterSpecCompiled	makeFilterSpec(EventType eventType, java.lang.String eventTypeName, java.util.List<ExprNode> filterExpessions, PropertyEvalSpec optionalPropertyEvalSpec, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes, StreamTypeService streamTypeService, java.lang.String optionalStreamName, StatementContext statementContext, java.util.Collection<java.lang.Integer> assignedTypeNumberStack) Factory method for compiling filter expressions into a filter specification for use with filter service.
static java.util.List<ExprNode>	validateAllowSubquery(ExprNodeOrigin exprNodeOrigin, java.util.List<ExprNode> exprNodes, StreamTypeService streamTypeService, StatementContext statementContext, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes) Validates expression nodes and returns a list of validated nodes.

Methods inherited from class java.lang.Object

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

Field Detail

PROPERTY_NAME_BOOLEAN_EXPRESSION

public static final java.lang.String PROPERTY_NAME_BOOLEAN_EXPRESSION

Assigned for filter parameters that are based on boolean expression and not on any particular property name.

Keeping this artificial property name is a simplification as optimized filter parameters generally keep a property name.

See Also:

Constant Field Values

Constructor Detail

FilterSpecCompiler

public FilterSpecCompiler()

Method Detail

makeFilterSpec

public static FilterSpecCompiled makeFilterSpec(EventType eventType,
                                                java.lang.String eventTypeName,
                                                java.util.List<ExprNode> filterExpessions,
                                                PropertyEvalSpec optionalPropertyEvalSpec,
                                                java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes,
                                                java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes,
                                                StreamTypeService streamTypeService,
                                                java.lang.String optionalStreamName,
                                                StatementContext statementContext,
                                                java.util.Collection<java.lang.Integer> assignedTypeNumberStack)
                                         throws ExprValidationException

Factory method for compiling filter expressions into a filter specification for use with filter service.

Parameters:

eventType - is the filtered-out event type

eventTypeName - is the name of the event type

filterExpessions - is a list of filter expressions

taggedEventTypes - is a map of stream names (tags) and event types available

arrayEventTypes - is a map of name tags and event type per tag for repeat-expressions that generate an array of events

streamTypeService - is used to set rules for resolving properties

optionalStreamName - - the stream name, if provided

optionalPropertyEvalSpec - - specification for evaluating properties

statementContext - context for statement

Returns:

compiled filter specification

Throws:

ExprValidationException - if the expression or type validations failed

build

public static FilterSpecCompiled build(java.util.List<ExprNode> validatedNodes,
                                       EventType eventType,
                                       java.lang.String eventTypeName,
                                       PropertyEvalSpec optionalPropertyEvalSpec,
                                       java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes,
                                       java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes,
                                       StreamTypeService streamTypeService,
                                       java.lang.String optionalStreamName,
                                       StatementContext stmtContext,
                                       java.util.Collection<java.lang.Integer> assignedTypeNumberStack)
                                throws ExprValidationException

Throws:

ExprValidationException

buildNoStmtCtx

public static FilterSpecCompiled buildNoStmtCtx(java.util.List<ExprNode> validatedFilterNodes,
                                                EventType eventType,
                                                java.lang.String eventTypeName,
                                                PropertyEvalSpec optionalPropertyEvalSpec,
                                                java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes,
                                                java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes,
                                                StreamTypeService streamTypeService,
                                                java.lang.String optionalStreamName,
                                                java.util.Collection<java.lang.Integer> assignedTypeNumberStack,
                                                ExprEvaluatorContext exprEvaluatorContext,
                                                java.lang.String statementId,
                                                java.lang.String statementName,
                                                java.lang.annotation.Annotation[] annotations,
                                                ContextDescriptor contextDescriptor,
                                                MethodResolutionService methodResolutionService,
                                                EventAdapterService eventAdapterService,
                                                TimeProvider timeProvider,
                                                VariableService variableService,
                                                TableService tableService,
                                                ConfigurationInformation configurationInformation,
                                                NamedWindowService namedWindowService)
                                         throws ExprValidationException

Throws:

ExprValidationException

validateAllowSubquery

public static java.util.List<ExprNode> validateAllowSubquery(ExprNodeOrigin exprNodeOrigin,
                                                             java.util.List<ExprNode> exprNodes,
                                                             StreamTypeService streamTypeService,
                                                             StatementContext statementContext,
                                                             java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes,
                                                             java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes)
                                                      throws ExprValidationException

Validates expression nodes and returns a list of validated nodes.

Parameters:

exprNodes - is the nodes to validate

streamTypeService - is provding type information for each stream

taggedEventTypes - pattern tagged types

arrayEventTypes - @return list of validated expression nodes

statementContext - context

Returns:

expr nodes

Throws:

ExprValidationException - for validation errors