NAME

App::Framework::Base::Object::ErrorHandle - Adds error handling to basic object

SYNOPSIS

use App::Framework::Base::Object::ErrorHandle ;

DESCRIPTION

Any object derived from this class can throw an error and some registered error handler will catch (and handle) that error.

Hierarchy of catch handlers is:

catch_fn set for this object instance
any registered global catch function (last registered first)
default handler

Global catch functions, when registered, are added to a stack so that the last one registered is called first.

Each handler must return either 1=handled, or 0=not handled to tell this object whether to move on to the next handler.

NOTE: The default handler may be over-ridden by any derived object.

This object is set up such that when used as stand-alone objects (i.e. outside of an application framework), then errors are handled with die(), warn() etc.

DIAGNOSTICS

Setting the debug flag to level 1 prints out (to STDOUT) some debug messages, setting it to level 2 prints out more verbose messages.

AUTHOR

Steve Price <sdprice at cpan.org>

BUGS

None that I know of!

INTERFACE

new([%args])

Create a new App::Framework::Base::Object::ErrorHandle.

The %args are specified as they would be in the set method, for example:

'mmap_handler' => $mmap_handler

The full list of possible arguments are :

'fields'	=> Either ARRAY list of valid field names, or HASH of field names with default values 

init_class([%args])

Initialises the App::Framework::Base::Object::ErrorHandle object class variables. Creates a class instance so that these methods can also be called via the class (don't need a specific instance)

add_global_error($error)

Add a new error to the Class list keeping track of all runtime errors

global_error([%args])

Add a new error to the Class list keeping track of all runtime errors

%args hash contains:

* type = fatal, nonfatal, warning, note
* message = text message
* errorcode = integer error code value

global_last_error()

Returns a hash containing the information from the last error stored in the global list

Hash contains:

* type = fatal, nonfatal, warning, note
* message = text message
* errorcode = integer error code value

If there are no errors, returns undef

global_errors()

Returns the list of all errors

any_error()

Returns a hash containing the information from the last actual error (i.e. only 'fatal' or 'nonfatal' types) stored in the global list

Hash contains:

* type = fatal, error, warning, note
* message = text message
* errorcode = integer error code value

If there are no errors, returns undef

error_check($error, $mask)

Returns TRUE if the $error object type matches the mask

is_error($error)

Returns TRUE if the $error object is either 'fatal' or 'nonfatal'

is_warning($error)

Returns TRUE if the $error object is 'warning'

is_note($error)

Returns TRUE if the $error object is 'note'

error_split($error)

Split the error object into component parts and return them in an ARRAY:

[0] = Message
[1] = Error code
[2] = Type
[3] = Parent 

register_global_handler($code_ref)

Add a new global error handler on to the stack

default_error_handler($error)

Last ditch attempt to handle errors. Uses die(), warn() etc as appropriate.

_throw_error($error)

Add a new error to this object instance, also adds the error to this Class list keeping track of all runtime errors

rethrow_error($error_ref)

Throws an error for this object based on an error object associated with a different object

throw_error([%args])

Add a new error to this object instance, also adds the error to this Class list keeping track of all runtime errors

%args hash contains:

* type = fatal, nonfatal, warning, note
* message = text message
* errorcode = integer error code value

throw_fatal($message, [$errorcode])

Add a new error (type=fatal) to this object instance, also adds the error to this Class list keeping track of all runtime errors

throw_nonfatal($message, [$errorcode])

Add a new error (type=nonfatal) to this object instance, also adds the error to this Class list keeping track of all runtime errors

throw_warning($message, [$errorcode])

Add a new error (type=warning) to this object instance, also adds the error to this Class list keeping track of all runtime errors

throw_note($message, [$errorcode])

Add a new error (type=note) to this object instance, also adds the error to this Class list keeping track of all runtime errors

last_error()

Returns a hash containing the information from the last (worst case) error stored for this object i.e. if a 'fatal' error is followed by some 'note's then the 'fatal' error is returned

Hash contains:

* type = fatal, error, warning, note
* message = text message
* errorcode = integer error code value

If there are no errors, returns undef

error()

Returns a hash containing the information from the last actual error (i.e. only 'fatal' or 'nonfatal' types) stored for this object

Hash contains:

* type = fatal, error, warning, note
* message = text message
* errorcode = integer error code value

If there are no errors, returns undef

App::Framework::Base::Object::ErrorHandle::_create_error()

Returns a hash containing the information from the last error stored for this object

Hash contains:

* type = fatal, error, warning, note
* message = text message
* errorcode = integer error code value

If there are no errors, returns undef

App::Framework::Base::Object::ErrorHandle::_cmp_error($err1, $err2)

Compares error types. If the type of $err1 is more srious than $err2 then returns positive; if type $err1 is less serious than $err2 then returns negative; otherwise returns 0

Order of seriousness:

* fatal
* error
* warning
* note

App::Framework::Base::Object::ErrorHandle::_latest_worst_error($errors_aref)

Works through the specified errors list and returns the latest, worst error