com.espertech.esper.epl.spec

Class SubstitutionParameterExpressionBase

java.lang.Object

com.espertech.esper.client.soda.ExpressionBase

com.espertech.esper.epl.spec.SubstitutionParameterExpressionBase

All Implemented Interfaces:

Expression, Serializable

Direct Known Subclasses:

SubstitutionParameterExpressionIndexed, SubstitutionParameterExpressionNamed

public abstract class SubstitutionParameterExpressionBase
extends ExpressionBase

Substitution parameter that represents a node in an expression tree for which to supply a parameter value before statement creation time.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SubstitutionParameterExpressionBase()

Method Summary

Modifier and Type	Method and Description
Object	getConstant() Returns the constant value that the expression represents.
ExpressionPrecedenceEnum	getPrecedence() Returns precedence.
boolean	isSatisfied() Returns true if the parameter is satisfied, or false if not.
void	setConstant(Object constant) Sets the constant value that the expression represents.
void	toPrecedenceFreeEPL(StringWriter writer) Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.
protected abstract void	toPrecedenceFreeEPLUnsatisfied(StringWriter writer)

Methods inherited from class com.espertech.esper.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 Detail

SubstitutionParameterExpressionBase

public SubstitutionParameterExpressionBase()

Method Detail

toPrecedenceFreeEPLUnsatisfied

protected abstract void toPrecedenceFreeEPLUnsatisfied(StringWriter writer)

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

getConstant

public Object getConstant()

Returns the constant value that the expression represents.

Returns:

value of constant

isSatisfied

public boolean isSatisfied()

Returns true if the parameter is satisfied, or false if not.

Returns:

true if the actual value is supplied, false if not

setConstant

public void setConstant(Object constant)

Sets the constant value that the expression represents.

Parameters:

constant - is the value, or null to indicate the null value