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java.lang.Objectnet.esper.eql.expression.ExprNode
net.esper.eql.expression.ExprEqualsNode
public class ExprEqualsNode
Represents an equals (=) comparator in a filter expressiun tree.
Constructor Summary | |
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ExprEqualsNode(boolean isNotEquals)
Ctor. |
Method Summary | |
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boolean |
equalsNode(ExprNode node)
Return true if a expression node semantically equals the current node, or false if not. |
java.lang.Object |
evaluate(EventBean[] eventsPerStream)
Evaluate event tuple and return result. |
java.lang.Class |
getType()
Returns the type that the node's evaluate method returns an instance of. |
boolean |
isNotEquals()
Returns true if this is a NOT EQUALS node, false if this is a EQUALS node. |
java.lang.String |
toExpressionString()
Returns the expression node rendered as a string. |
void |
validate(StreamTypeService streamTypeService,
AutoImportService autoImportService)
Validate node. |
Methods inherited from class net.esper.eql.expression.ExprNode |
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accept, addChildNode, deepEquals, dumpDebug, getChildNodes, getValidatedSubtree |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ExprEqualsNode(boolean isNotEquals)
isNotEquals
- - true if this is a (!=) not equals rather then equals, false if its a '=' equalsMethod Detail |
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public boolean isNotEquals()
public void validate(StreamTypeService streamTypeService, AutoImportService autoImportService) throws ExprValidationException
ExprValidator
streamTypeService
- serves stream event type infoautoImportService
- - for resolving class names in library method invocations
ExprValidationException
- thrown when validation failedpublic java.lang.Class getType()
ExprValidator
public java.lang.Object evaluate(EventBean[] eventsPerStream)
ExprEvaluator
eventsPerStream
- - event tuple
public java.lang.String toExpressionString()
ExprNode
toExpressionString
in class ExprNode
public boolean equalsNode(ExprNode node)
ExprNode
Concrete implementations should compare the type and any additional information that impact the evaluation of a node.
equalsNode
in class ExprNode
node
- to compare to
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