io.crate.operation.scalar.cast

Class CastFunction

java.lang.Object

io.crate.metadata.Scalar<java.lang.Object,java.lang.Object>

io.crate.operation.scalar.cast.CastFunction

All Implemented Interfaces:

FunctionFormatSpec, FunctionImplementation

Direct Known Subclasses:

TryCastScalarFunction

public class CastFunction
extends Scalar<java.lang.Object,java.lang.Object>
implements FunctionFormatSpec

Field Summary

Fields

Modifier and Type	Field and Description
protected FunctionInfo	info
protected DataType	returnType

Method Summary

Modifier and Type	Method and Description
java.lang.String	afterArgs(Function function) stuff that comes after arguments are formatted
java.lang.String	beforeArgs(Function function) stuff that comes before arguments are formatted
java.lang.Object	evaluate(Input<java.lang.Object>... args) Evaluate the function using the provided arguments
boolean	formatArgs(Function function) whether or not to formatSymbol the arguments
FunctionInfo	info() Provides meta information about this function implementation.
Symbol	normalizeSymbol(Function symbol, TransactionContext transactionContext) Normalize a symbol into a simplified form.
protected java.lang.Object	onEvaluateException(java.lang.Object argument)
protected Symbol	onNormalizeException(Symbol argument)
static void	register(ScalarFunctionModule module)

Methods inherited from class io.crate.metadata.Scalar

anyNonLiterals, compile, withOperator

Methods inherited from class java.lang.Object

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

Field Detail

returnType

protected final DataType returnType

info

protected final FunctionInfo info

Method Detail

evaluate

@SafeVarargs
public final java.lang.Object evaluate(Input<java.lang.Object>... args)

Description copied from class: Scalar

Evaluate the function using the provided arguments

Specified by:

evaluate in class Scalar<java.lang.Object,java.lang.Object>

info

public FunctionInfo info()

Description copied from interface: FunctionImplementation

Provides meta information about this function implementation.

Specified by:

info in interface FunctionImplementation

normalizeSymbol

public Symbol normalizeSymbol(Function symbol,
                              TransactionContext transactionContext)

Description copied from interface: FunctionImplementation

Normalize a symbol into a simplified form. This may return the symbol as is if it cannot be normalized.

Specified by:

normalizeSymbol in interface FunctionImplementation

Overrides:

normalizeSymbol in class Scalar<java.lang.Object,java.lang.Object>

transactionContext - context which is shared across normalizeSymbol calls during a statement-lifecycle. This will only be present if normalizeSymbol is called on the handler node. normalizeSymbol calls during execution won't receive a StmtCtx

onNormalizeException

protected Symbol onNormalizeException(Symbol argument)

onEvaluateException

protected java.lang.Object onEvaluateException(java.lang.Object argument)

beforeArgs

public java.lang.String beforeArgs(Function function)

Description copied from interface: FunctionFormatSpec

stuff that comes before arguments are formatted

Specified by:

beforeArgs in interface FunctionFormatSpec

afterArgs

public java.lang.String afterArgs(Function function)

Description copied from interface: FunctionFormatSpec

stuff that comes after arguments are formatted

Specified by:

afterArgs in interface FunctionFormatSpec

formatArgs

public boolean formatArgs(Function function)

Description copied from interface: FunctionFormatSpec

whether or not to formatSymbol the arguments

Specified by:

formatArgs in interface FunctionFormatSpec

register

public static void register(ScalarFunctionModule module)