com.espertech.esper.client.soda

Class CastExpression

java.lang.Object

com.espertech.esper.client.soda.ExpressionBase

com.espertech.esper.client.soda.CastExpression

All Implemented Interfaces:

Expression, Serializable

public class CastExpression
extends ExpressionBase

Cast expression casts the return value of an expression to a specified type.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CastExpression() Ctor.
CastExpression(Expression expressionToCheck, String typeName) Ctor.
CastExpression(String typeName) Ctor - for use to create an expression tree, without child expression.

Method Summary

Modifier and Type	Method and Description
ExpressionPrecedenceEnum	getPrecedence() Returns precedence.
String	getTypeName() Returns the name of the type to cast to.
void	setTypeName(String typeName) Sets the name of the type to cast to.
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.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

CastExpression

public CastExpression()

Ctor.

CastExpression

public CastExpression(String typeName)

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

Parameters:

typeName - is the type to cast to: a fully-qualified class name or Java primitive type name or "string"

CastExpression

public CastExpression(Expression expressionToCheck,
                      String typeName)

Ctor.

Parameters:

expressionToCheck - provides values to cast

typeName - is the type to cast to: a fully-qualified class names or Java primitive type names or "string"

Method Detail

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

getTypeName

public String getTypeName()

Returns the name of the type to cast to.

Returns:

type name

setTypeName

public void setTypeName(String typeName)

Sets the name of the type to cast to.

Parameters:

typeName - is the name of type to cast to