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java.lang.Objectnet.esper.eql.expression.ExprNode
net.esper.eql.expression.ExprStaticMethodNode
public class ExprStaticMethodNode
Represents an invocation of a static library method in the expression tree.
Nested Class Summary |
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Nested classes/interfaces inherited from class net.esper.eql.expression.ExprNode |
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ExprNode.MappedPropertyParseResult |
Constructor Summary | |
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ExprStaticMethodNode(String className,
String methodName)
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. |
Object |
evaluate(EventBean[] eventsPerStream,
boolean isNewData)
Evaluate event tuple and return result. |
String |
getClassName()
Returns the class name. |
String |
getMethodName()
Returns the method name. |
Class[] |
getParamTypes()
Returns parameter descriptor. |
protected Method |
getStaticMethod()
Returns the static method. |
Class |
getType()
Returns the type that the node's evaluate method returns an instance of. |
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. |
String |
toExpressionString()
Returns the expression node rendered as a string. |
void |
validate(StreamTypeService streamTypeService,
MethodResolutionService methodResolutionService,
ViewResourceDelegate viewResourceDelegate,
TimeProvider timeProvider)
Validate node. |
Methods inherited from class net.esper.eql.expression.ExprNode |
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accept, addChildNode, deepEquals, dumpDebug, getChildNodes, getValidatedSubtree, parseMappedProperty |
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 ExprStaticMethodNode(String className, String methodName)
className
- - the declaring class for the method that this node will invokemethodName
- - the name of the method that this node will invokeMethod Detail |
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public boolean isConstantResult()
ExprNode
isConstantResult
in class ExprNode
protected Method getStaticMethod()
public String getClassName()
public String getMethodName()
public Class[] getParamTypes()
public 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
public void validate(StreamTypeService streamTypeService, MethodResolutionService methodResolutionService, ViewResourceDelegate viewResourceDelegate, TimeProvider timeProvider) throws ExprValidationException
ExprValidator
streamTypeService
- serves stream event type infomethodResolutionService
- - for resolving class names in library method invocationsviewResourceDelegate
- - delegates for view resources to expression nodestimeProvider
- - provides engine current time
ExprValidationException
- thrown when validation failedpublic Class getType() throws ExprValidationException
ExprValidator
ExprValidationException
- thrown when validation failedpublic Object evaluate(EventBean[] eventsPerStream, boolean isNewData)
ExprEvaluator
eventsPerStream
- - event tupleisNewData
- - indicates whether we are dealing with new data (istream) or old data (rstream)
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