io.appform.hope.core.exceptions.errorstrategy

Interface ErrorHandlingStrategy

All Known Implementing Classes:

DefaultErrorHandlingStrategy, InjectValueErrorHandlingStrategy

public interface ErrorHandlingStrategy

This class is called in error situations. This lets' users configure the behaviour in scenarios where these scenarios appear.

Method Summary

Modifier and Type	Method and Description
<T> T	handleIllegalEval(String message, T defaultValue) This handler is called in case there is some bug in the evaluation.
<T> T	handleMissingValue(String path, T defaultValue) This handler is invoked when a value cannot be resolved from a path.
<T> T	handleTypeMismatch(String path, String expected, String actual, T defaultValue) This handler is invoked when there is type mismatch between value at path and that present in json.
default void	paramValidationFailure(String checkFailureMessage) This handler is invoked when param evaluation in a HopeFunction evaluation fails

Method Detail

handleMissingValue

<T> T handleMissingValue(String path,
                         T defaultValue)

This handler is invoked when a value cannot be resolved from a path. This happens when value is not present or null.

Type Parameters:

T - Type of default Value

Parameters:

path - Path for which value was not found

defaultValue - Default value to be returned if present

Returns:

defaultValue or exception depending on implementation

handleTypeMismatch

<T> T handleTypeMismatch(String path,
                         String expected,
                         String actual,
                         T defaultValue)

This handler is invoked when there is type mismatch between value at path and that present in json.

Type Parameters:

T - Type of defaultValue

Parameters:

path - Path for which value mismatch was detected

expected - Expected type

actual - Type found in provided json

defaultValue - Default value to be returned in case of mismatch

Returns:

defaultValue or throws exception depending on implementation

paramValidationFailure

default void paramValidationFailure(String checkFailureMessage)

This handler is invoked when param evaluation in a HopeFunction evaluation fails

Parameters:

checkFailureMessage - Message describing the failure

handleIllegalEval

<T> T handleIllegalEval(String message,
                        T defaultValue)

This handler is called in case there is some bug in the evaluation. This should never be raised faced in production. In case this happens it is a bug that should be reported.

Type Parameters:

T - Type of defaultValue

Parameters:

message - Custom message provided at assertion site

defaultValue - Default value to be returned if this state is faced

Returns:

defaultValue or throws exception depending on implementation