com.espertech.esper.epl.expression.ops
Interface ExprEqualsNode

All Superinterfaces:

ExprNode, ExprValidator, MetaDefItem, java.io.Serializable

All Known Implementing Classes:

ExprEqualsNodeImpl

public interface ExprEqualsNode
extends ExprNode

Represents an equals (=, !=, <>, is, is not) comparator in a filter expressiun tree.

Method Summary

boolean	isIs() Returns true if this is a "IS" or "IS NOT" node, false if this is a EQUALS or NOT EQUALS node.
boolean	isNotEquals() Returns true if this is a NOT EQUALS node, false if this is a EQUALS node.

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

accept, accept, acceptChildnodes, addChildNode, addChildNodes, equalsNode, getChildNodes, getExprEvaluator, getPrecedence, isConstantResult, replaceUnlistedChildNode, setChildNode, setChildNodes, toEPL

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

validate

Method Detail

isNotEquals

boolean isNotEquals()

Returns true if this is a NOT EQUALS node, false if this is a EQUALS node.

Returns:

true for !=, false for =

isIs

boolean isIs()

Returns true if this is a "IS" or "IS NOT" node, false if this is a EQUALS or NOT EQUALS node.

Returns:

true for !=, false for =