ExprCastNode (Esper API Documentation)

java.lang.Object
- com.espertech.esper.epl.expression.core.ExprNodeBase
- - com.espertech.esper.epl.expression.funcs.ExprCastNode

All Implemented Interfaces:

ExprNode, ExprNodeRenderable, ExprValidator, MetaDefItem, Serializable
```
public class ExprCastNode
extends ExprNodeBase
```
Represents the CAST(expression, type) function is an expression tree.

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static interface`	`ExprCastNode.CasterParserComputer` Casting and parsing computer.
`static interface`	`ExprCastNode.CasterParserComputerForge` Casting and parsing computer.
`static class`	`ExprCastNode.NonnumericCasterComputer` Casting and parsing computer.
`static class`	`ExprCastNode.NumberCasterComputer` Casting and parsing computer.
`static class`	`ExprCastNode.StringParserComputer` Casting and parsing computer.
`static class`	`ExprCastNode.StringToCalendarWDynamicFormatComputer`
`static class`	`ExprCastNode.StringToCalendarWDynamicFormatComputerEval`
`static class`	`ExprCastNode.StringToCalendarWStaticFormatComputer`
`static class`	`ExprCastNode.StringToCalendarWStaticISOFormatComputer`
`static class`	`ExprCastNode.StringToDateLongWDynamicFormatEval`
`static class`	`ExprCastNode.StringToDateLongWDynamicFormatForge`
`static class`	`ExprCastNode.StringToDateLongWStaticFormat`
`static class`	`ExprCastNode.StringToDateWDynamicFormatComputerEval`
`static class`	`ExprCastNode.StringToDateWDynamicFormatComputerForge`
`static class`	`ExprCastNode.StringToDateWStaticFormatComputer`
`static class`	`ExprCastNode.StringToDateWStaticISOFormatComputer`
`static class`	`ExprCastNode.StringToJava8WDynamicFormatComputerEval`
`static class`	`ExprCastNode.StringToJava8WDynamicFormatComputerForge`
`static class`	`ExprCastNode.StringToJava8WStaticFormatComputer`
`static class`	`ExprCastNode.StringToLocalDateTimeWDynamicFormatComputerEval`
`static class`	`ExprCastNode.StringToLocalDateTimeWDynamicFormatComputerForge`
`static class`	`ExprCastNode.StringToLocalDateTimeWStaticFormatComputer`
`static class`	`ExprCastNode.StringToLocalDateWDynamicFormatComputerEval`
`static class`	`ExprCastNode.StringToLocalDateWDynamicFormatComputerForge`
`static class`	`ExprCastNode.StringToLocalDateWStaticFormatComputer`
`static class`	`ExprCastNode.StringToLocalTimeWDynamicFormatComputerEval`
`static class`	`ExprCastNode.StringToLocalTimeWDynamicFormatComputerForge`
`static class`	`ExprCastNode.StringToLocalTimeWStaticFormatComputer`
`static class`	`ExprCastNode.StringToLongWDynamicFormatComputerEval`
`static class`	`ExprCastNode.StringToLongWDynamicFormatComputerForge`
`static class`	`ExprCastNode.StringToLongWStaticFormatComputer`
`static class`	`ExprCastNode.StringToLongWStaticISOFormatComputer`
`static class`	`ExprCastNode.StringToZonedDateTimeWDynamicFormatComputerEval`
`static class`	`ExprCastNode.StringToZonedDateTimeWDynamicFormatComputerForge`
`static class`	`ExprCastNode.StringToZonedDateTimeWStaticFormatComputer`
`static class`	`ExprCastNode.StringXFormComputer` Casting and parsing computer.

Constructor Summary

Constructors
Constructor and Description

ExprCastNode(String classIdentifier)
Ctor.

Constructors
Constructor and Description
`ExprCastNode(String classIdentifier)` Ctor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equalsNode(ExprNode node, boolean ignoreStreamPrefix)` Return true if a expression node semantically equals the current node, or false if not.
`String`	`getClassIdentifier()` Returns the name of the type of cast to.
`ExprEvaluator`	`getExprEvaluator()`
`ExprForge`	`getForge()`
`ExprPrecedenceEnum`	`getPrecedence()` Returns precedence.
`Class`	`getTargetType()`
`static EPException`	`handleParseException(String formatString, String date, Exception ex)`
`static EPException`	`handleParseISOException(String date, ScheduleParameterException ex)`
`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.
`static DateTimeFormatter`	`stringToDateTimeFormatterSafe(Object format)`
`static SimpleDateFormat`	`stringToSimpleDateFormatSafe(Object format)` NOTE: Code-generation-invoked method, method name and parameter order matters
`void`	`toPrecedenceFreeEPL(StringWriter writer)`
`ExprNode`	`validate(ExprValidationContext validationContext)`

Methods inherited from class com.espertech.esper.epl.expression.core.ExprNodeBase
accept, accept, acceptChildnodes, addChildNode, addChildNodes, addChildNodeToFront, getChildNodes, replaceUnlistedChildNode, setChildNode, setChildNodes, toEPL

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ExprCastNode
```
public ExprCastNode(String classIdentifier)
```
    Ctor.
    
    Parameters:
    
    classIdentifier - the the name of the type to cast to
- Method Detail
  - getExprEvaluator
```
public ExprEvaluator getExprEvaluator()
```
  - getForge
```
public ExprForge getForge()
```
  - getClassIdentifier
```
public String getClassIdentifier()
```
    Returns the name of the type of cast to.
    
    Returns:
    
    type name
  - validate
```
public ExprNode validate(ExprValidationContext validationContext)
                  throws ExprValidationException
```
    Throws:
    
    ExprValidationException
  - isConstantResult
```
public boolean isConstantResult()
```
    Description copied from interface: ExprNode
    
    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.
    
    Returns:
    
    true for constant evaluation value, false for non-constant evaluation value
  - getTargetType
```
public Class getTargetType()
```
  - toPrecedenceFreeEPL
```
public void toPrecedenceFreeEPL(StringWriter writer)
```
    Specified by:
    
    toPrecedenceFreeEPL in class ExprNodeBase
  - getPrecedence
```
public ExprPrecedenceEnum getPrecedence()
```
    Description copied from interface: ExprNode
    
    Returns precedence.
    
    Returns:
    
    precedence
  - equalsNode
```
public boolean equalsNode(ExprNode node,
                          boolean ignoreStreamPrefix)
```
    Description copied from interface: ExprNode
    
    Return true if a expression node semantically equals the current node, or false if not.
    Concrete implementations should compare the type and any additional information that impact the evaluation of a node.
    
    Parameters:
    
    node - to compare to
    
    ignoreStreamPrefix - when the equals-comparison can ignore prefix of event properties
    
    Returns:
    
    true if semantically equal, or false if not equals
  - handleParseException
```
public static EPException handleParseException(String formatString,
                                               String date,
                                               Exception ex)
```
  - handleParseISOException
```
public static EPException handleParseISOException(String date,
                                                  ScheduleParameterException ex)
```
  - stringToSimpleDateFormatSafe
```
public static SimpleDateFormat stringToSimpleDateFormatSafe(Object format)
```
    NOTE: Code-generation-invoked method, method name and parameter order matters
    
    Parameters:
    
    format - format
    
    Returns:
    
    date format
  - stringToDateTimeFormatterSafe
```
public static DateTimeFormatter stringToDateTimeFormatterSafe(Object format)
```

Class ExprCastNode

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class com.espertech.esper.epl.expression.core.ExprNodeBase

Methods inherited from class java.lang.Object

Constructor Detail

ExprCastNode

Method Detail

getExprEvaluator

getForge

getClassIdentifier

validate

isConstantResult

getTargetType

toPrecedenceFreeEPL

getPrecedence

equalsNode

handleParseException

handleParseISOException

stringToSimpleDateFormatSafe

stringToDateTimeFormatterSafe