com.pervasive.datarush.functions

Class InvalidOperandTypeException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

com.pervasive.datarush.DRException

com.pervasive.datarush.functions.InvalidOperandTypeException

All Implemented Interfaces:

Serializable

public class InvalidOperandTypeException
extends DRException

An exception indicating the data type of a subexpression is not valid for use in the containing expression.

These errors are typically raised at one of two times:

• During definition of a function instance, when it is determined that upper bounds on the expression cannot satisfy requirements.
• When constructing an evaluator in the context of a record schema and the subexpression fails to satisfy requirements.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
InvalidOperandTypeException(String reason) Declares an exception occurred for the specified reason.
InvalidOperandTypeException(String reason, ScalarTokenType required) Declares an exception occurred for the specified reason.
InvalidOperandTypeException(String reason, ScalarTokenType required, ScalarValuedFunction operand, ScalarTokenType operandType) Declares an exception occurred for the specified reason, caused by the given subexpression yielding a result of the given type.
InvalidOperandTypeException(String reason, ScalarValuedFunction operand, ScalarTokenType operandType) Declares an exception occurred for the specified reason, caused by the given subexpression yielding a result of the given type.

Method Summary

Modifier and Type	Method and Description
void	addOperand(ScalarValuedFunction operand, ScalarTokenType operandType) Adds an additional subexpression and its type to the error.
String	getMessage()
ScalarTokenType	getRequiredType() Gets the type requirement which failed to be satisfied.

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

InvalidOperandTypeException

public InvalidOperandTypeException(String reason)

Declares an exception occurred for the specified reason. No type requirement is provided with the error.

Parameters:

reason - an explanation of the cause of the error

InvalidOperandTypeException

public InvalidOperandTypeException(String reason,
                                   ScalarTokenType required)

Declares an exception occurred for the specified reason.

Parameters:

reason - an explanation of the cause of the error

required - the type requirement which could not be met

InvalidOperandTypeException

public InvalidOperandTypeException(String reason,
                                   ScalarValuedFunction operand,
                                   ScalarTokenType operandType)

Declares an exception occurred for the specified reason, caused by the given subexpression yielding a result of the given type.

Parameters:

reason - an explanation of the cause of the error

operand - the offending subexpression

operandType - the result type of the offending subexpression

InvalidOperandTypeException

public InvalidOperandTypeException(String reason,
                                   ScalarTokenType required,
                                   ScalarValuedFunction operand,
                                   ScalarTokenType operandType)

Declares an exception occurred for the specified reason, caused by the given subexpression yielding a result of the given type.

Parameters:

reason - an explanation of the cause of the error

required - the type requirement which could not be met

operand - the offending subexpression

operandType - the result type of the offending subexpression

Method Detail

addOperand

public void addOperand(ScalarValuedFunction operand,
                       ScalarTokenType operandType)

Adds an additional subexpression and its type to the error.

In some cases, the type requirement may involve multiple subexpressions; for instance, if all arguments must be comparable. Use this method to this additional information to the exception.

Parameters:

operand - the offending subexpression

operandType - the result type of the offending subexpression

getMessage

public String getMessage()

Overrides:

getMessage in class Throwable

getRequiredType

public ScalarTokenType getRequiredType()

Gets the type requirement which failed to be satisfied.

In some cases, this may return TokenTypeConstant.SCALAR, indicating the requirement is more complex than can be expressed by a single type value.

Returns:

the type which was required