com.espertech.esper.epl.expression.ops

Class ExprRelationalOpAllAnyNode

java.lang.Object

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

com.espertech.esper.epl.expression.ops.ExprRelationalOpAllAnyNode

All Implemented Interfaces:

ExprNode, ExprNodeRenderable, ExprValidator, MetaDefItem, Serializable

public class ExprRelationalOpAllAnyNode
extends ExprNodeBase

Represents a lesser or greater then (</<=/>/>=) expression in a filter expression tree.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExprRelationalOpAllAnyNode(RelationalOpEnum relationalOpEnum, boolean isAll) Ctor.

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.
ExprEvaluator	getExprEvaluator()
ExprForge	getForge()
ExprPrecedenceEnum	getPrecedence() Returns precedence.
RelationalOpEnum	getRelationalOpEnum() Returns the type of relational op used.
boolean	isAll() Returns true for ALL, false for ANY.
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

Constructor Detail

ExprRelationalOpAllAnyNode

public ExprRelationalOpAllAnyNode(RelationalOpEnum relationalOpEnum,
                                  boolean isAll)

Ctor.

Parameters:

relationalOpEnum - - type of compare, ie. lt, gt, le, ge

isAll - - true if all, false for any

Method Detail

getExprEvaluator

public ExprEvaluator getExprEvaluator()

getForge

public ExprForge getForge()

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.

Returns:

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

isAll

public boolean isAll()

Returns true for ALL, false for ANY.

Returns:

indicator all or any

getRelationalOpEnum

public RelationalOpEnum getRelationalOpEnum()

Returns the type of relational op used.

Returns:

enum with relational op type

validate

public ExprNode validate(ExprValidationContext validationContext)
                  throws ExprValidationException

Throws:

ExprValidationException

toPrecedenceFreeEPL

public void toPrecedenceFreeEPL(StringWriter writer)

Specified by:

toPrecedenceFreeEPL in class ExprNodeBase

getPrecedence

public ExprPrecedenceEnum getPrecedence()

Description copied from interface: ExprNode

Returns precedence.

Returns:

precedence

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.

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