com.espertech.esper.epl.script

Class ExprNodeScript

java.lang.Object

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

com.espertech.esper.epl.script.ExprNodeScript

All Implemented Interfaces:

ExprNode, ExprNodeInnerNodeProvider, ExprNodeRenderable, ExprValidator, MetaDefItem, Serializable

public class ExprNodeScript
extends ExprNodeBase
implements ExprNodeInnerNodeProvider

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	CONTEXT_BINDING_NAME

Constructor Summary

Constructors

Constructor and Description
ExprNodeScript(String defaultDialect, ExpressionScriptProvided script, List<ExprNode> parameters)

Method Summary

Modifier and Type	Method and Description
boolean	equalsNode(ExprNode node, boolean ignoreStreamPrefix) Return true if a expression node semantically equals the current node, or false if not.
List<ExprNode>	getAdditionalNodes()
String	getEventTypeNameAnnotation()
ExprNodeScriptEvaluator	getExprEvaluator()
ExprForge	getForge()
List<ExprNode>	getParameters()
ExprPrecedenceEnum	getPrecedence() Returns precedence.
ExpressionScriptProvided	getScript()
ExprNodeScriptEvaluator	getScriptExprEvaluator()
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.
void	toPrecedenceFreeEPL(StringWriter writer)
ExprNode	validate(ExprValidationContext validationContext)

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

accept, accept, acceptChildnodes, 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

Field Detail

CONTEXT_BINDING_NAME

public static final String CONTEXT_BINDING_NAME

See Also:

Constant Field Values

Constructor Detail

ExprNodeScript

public ExprNodeScript(String defaultDialect,
                      ExpressionScriptProvided script,
                      List<ExprNode> parameters)

Method Detail

getForge

public ExprForge getForge()

Specified by:

getForge in interface ExprNode

getAdditionalNodes

public List<ExprNode> getAdditionalNodes()

Specified by:

getAdditionalNodes in interface ExprNodeInnerNodeProvider

getExprEvaluator

public ExprNodeScriptEvaluator getExprEvaluator()

getScriptExprEvaluator

public ExprNodeScriptEvaluator getScriptExprEvaluator()

getParameters

public List<ExprNode> getParameters()

getEventTypeNameAnnotation

public String getEventTypeNameAnnotation()

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

getScript

public ExpressionScriptProvided getScript()

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

validate

public ExprNode validate(ExprValidationContext validationContext)
                  throws ExprValidationException

Specified by:

validate in interface ExprValidator

Throws:

ExprValidationException