Package com.espertech.esper.common.client.soda

Class PropertyExistsExpression

java.lang.Object

com.espertech.esper.common.client.soda.ExpressionBase

com.espertech.esper.common.client.soda.PropertyExistsExpression

All Implemented Interfaces:

Expression, Serializable

public class PropertyExistsExpression
extends ExpressionBase

Property-exists checks if a dynamic property exists.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
PropertyExistsExpression()	Ctor - for use to create an expression tree, without child expression.
PropertyExistsExpression(String propertyName)	Ctor.

Method Summary

Modifier and Type	Method	Description
ExpressionPrecedenceEnum	getPrecedence()	Returns precedence.
void	toPrecedenceFreeEPL(StringWriter writer)	Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.

Methods inherited from class com.espertech.esper.common.client.soda.ExpressionBase

addChild, getChildren, getTreeObjectName, renderAggregation, setChildren, setTreeObjectName, toEPL, toPrecedenceFreeEPL, toPrecedenceFreeEPL

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PropertyExistsExpression

public PropertyExistsExpression()

Ctor - for use to create an expression tree, without child expression.

PropertyExistsExpression

public PropertyExistsExpression(String propertyName)

Ctor.

Parameters:

propertyName - is the name of the property to check existence

Method Details

getPrecedence

public ExpressionPrecedenceEnum getPrecedence()

Description copied from interface: Expression

Returns precedence.

Returns:

precedence

toPrecedenceFreeEPL

public void toPrecedenceFreeEPL(StringWriter writer)

Description copied from class: ExpressionBase

Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.

Specified by:

toPrecedenceFreeEPL in class ExpressionBase

Parameters:

writer - is the output to use