com.espertech.esper.epl.declexpr

Class ExprDeclaredNodeImpl

java.lang.Object

com.espertech.esper.epl.expression.core.ExprNodeBase

com.espertech.esper.epl.declexpr.ExprDeclaredNodeImpl

All Implemented Interfaces:

ExprDeclaredNode, ExprDeclaredOrLambdaNode, ExprConstantNode, ExprFilterOptimizableNode, ExprNode, ExprNodeInnerNodeProvider, ExprNodeRenderable, ExprValidator, MetaDefItem, Serializable

public class ExprDeclaredNodeImpl
extends ExprNodeBase
implements ExprDeclaredNode, ExprDeclaredOrLambdaNode, ExprFilterOptimizableNode, ExprNodeInnerNodeProvider, ExprConstantNode

Expression instance as declared elsewhere.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExprDeclaredNodeImpl(ExpressionDeclItem prototype, List<ExprNode> chainParameters, ContextDescriptor contextDescriptor)

Method Summary

Modifier and Type	Method and Description
void	accept(ExprNodeVisitor visitor) Accept the visitor.
void	accept(ExprNodeVisitorWithParent visitor) Accept the visitor.
void	acceptChildnodes(ExprNodeVisitorWithParent visitor, ExprNode parent) Accept a visitor that receives both parent and child node.
CodegenExpression	codegen(CodegenParamSetExprPremade params, CodegenContext context)
boolean	equalsNode(ExprNode node, boolean ignoreStreamPrefix) Return true if a expression node semantically equals the current node, or false if not.
List<ExprNode>	getAdditionalNodes()
ExprNode	getBody()
List<ExprNode>	getChainParameters()
Class	getConstantType()
Object	getConstantValue(ExprEvaluatorContext context)
ExprNode	getExpressionBodyCopy()
ExprEvaluator	getExprEvaluator()
FilterSpecLookupable	getFilterLookupable()
boolean	getFilterLookupEligible()
ExprForge	getForge()
LinkedHashMap<String,Integer>	getOuterStreamNames(Map<String,Integer> outerStreamNames)
ExprPrecedenceEnum	getPrecedence() Returns precedence.
ExpressionDeclItem	getPrototype()
boolean	isConstantResult() Returns true if the expression node's evaluation value doesn't depend on any events data, as must be determined at validation time, which is bottom-up and therefore reliably allows each node to determine constant value.
boolean	isConstantValue()
void	toPrecedenceFreeEPL(StringWriter writer)
ExprNode	validate(ExprValidationContext validationContext)
boolean	validated()

Methods inherited from class com.espertech.esper.epl.expression.core.ExprNodeBase

addChildNode, addChildNodes, addChildNodeToFront, getChildNodes, replaceUnlistedChildNode, setChildNode, setChildNodes, toEPL

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.epl.expression.core.ExprNode

addChildNode, addChildNodes, getChildNodes, replaceUnlistedChildNode, setChildNode, setChildNodes

Methods inherited from interface com.espertech.esper.epl.expression.core.ExprNodeRenderable

toEPL

Constructor Detail

ExprDeclaredNodeImpl

public ExprDeclaredNodeImpl(ExpressionDeclItem prototype,
                            List<ExprNode> chainParameters,
                            ContextDescriptor contextDescriptor)

Method Detail

codegen

public CodegenExpression codegen(CodegenParamSetExprPremade params,
                                 CodegenContext context)

getForge

public ExprForge getForge()

Specified by:

getForge in interface ExprNode

getBody

public ExprNode getBody()

Specified by:

getBody in interface ExprDeclaredNode

getAdditionalNodes

public List<ExprNode> getAdditionalNodes()

Specified by:

getAdditionalNodes in interface ExprNodeInnerNodeProvider

validated

public boolean validated()

Specified by:

validated in interface ExprDeclaredOrLambdaNode

getConstantType

public Class getConstantType()

Specified by:

getConstantType in interface ExprConstantNode

getConstantValue

public Object getConstantValue(ExprEvaluatorContext context)

Specified by:

getConstantValue in interface ExprConstantNode

isConstantValue

public boolean isConstantValue()

Specified by:

isConstantValue in interface ExprConstantNode

getOuterStreamNames

public LinkedHashMap<String,Integer> getOuterStreamNames(Map<String,Integer> outerStreamNames)
                                                  throws ExprValidationException

Specified by:

getOuterStreamNames in interface ExprDeclaredNode

Throws:

ExprValidationException

validate

public ExprNode validate(ExprValidationContext validationContext)
                  throws ExprValidationException

Specified by:

validate in interface ExprValidator

Throws:

ExprValidationException

getFilterLookupEligible

public boolean getFilterLookupEligible()

Specified by:

getFilterLookupEligible in interface ExprFilterOptimizableNode

getFilterLookupable

public FilterSpecLookupable getFilterLookupable()

Specified by:

getFilterLookupable in interface ExprFilterOptimizableNode

isConstantResult

public boolean isConstantResult()

Description copied from interface: ExprNode

Returns true if the expression node's evaluation value doesn't depend on any events data, as must be determined at validation time, which is bottom-up and therefore reliably allows each node to determine constant value.

Specified by:

isConstantResult in interface ExprNode

Returns:

true for constant evaluation value, false for non-constant evaluation value

equalsNode

public boolean equalsNode(ExprNode node,
                          boolean ignoreStreamPrefix)

Description copied from interface: ExprNode

Return true if a expression node semantically equals the current node, or false if not.

Concrete implementations should compare the type and any additional information that impact the evaluation of a node.

Specified by:

equalsNode in interface ExprNode

Parameters:

node - to compare to

ignoreStreamPrefix - when the equals-comparison can ignore prefix of event properties

Returns:

true if semantically equal, or false if not equals

accept

public void accept(ExprNodeVisitor visitor)

Description copied from interface: ExprNode

Accept the visitor. The visitor will first visit the parent then visit all child nodes, then their child nodes.

The visitor can decide to skip child nodes by returning false in isVisit.

Specified by:

accept in interface ExprNode

Overrides:

accept in class ExprNodeBase

Parameters:

visitor - to visit each node and each child node.

accept

public void accept(ExprNodeVisitorWithParent visitor)

Description copied from interface: ExprNode

Accept the visitor. The visitor will first visit the parent then visit all child nodes, then their child nodes.

The visitor can decide to skip child nodes by returning false in isVisit.

Specified by:

accept in interface ExprNode

Overrides:

accept in class ExprNodeBase

Parameters:

visitor - to visit each node and each child node.

acceptChildnodes

public void acceptChildnodes(ExprNodeVisitorWithParent visitor,
                             ExprNode parent)

Description copied from interface: ExprNode

Accept a visitor that receives both parent and child node.

Specified by:

acceptChildnodes in interface ExprNode

Overrides:

acceptChildnodes in class ExprNodeBase

Parameters:

visitor - to apply

parent - node

getExpressionBodyCopy

public ExprNode getExpressionBodyCopy()

getPrototype

public ExpressionDeclItem getPrototype()

Specified by:

getPrototype in interface ExprDeclaredNode

getChainParameters

public List<ExprNode> getChainParameters()

Specified by:

getChainParameters in interface ExprDeclaredNode

getExprEvaluator

public ExprEvaluator getExprEvaluator()

toPrecedenceFreeEPL

public void toPrecedenceFreeEPL(StringWriter writer)

Specified by:

toPrecedenceFreeEPL in class ExprNodeBase

getPrecedence

public ExprPrecedenceEnum getPrecedence()

Description copied from interface: ExprNode

Returns precedence.

Specified by:

getPrecedence in interface ExprNode

Returns:

precedence