Libraries JSONExport

Library	Extends	Path
JSONExport		/application/libraries/JSONExport.php

This library handles nilai data export to JSON file.

Export should be able to handle data regardless of number of marks to export. So data are processed in packs, saved to temporary file and served as attachment in the end. JSON file format has to be well defined in order to import it later line-by-line, without need to load it as a whole into memory.

Constants

Constant	Type	Default	Description
FLUSH_ON_WRITE	boolean	false	Decides if every write to the file should result in flushing it
JSON_START	string	{\n	JSON start character
JSON_END	string	}	JSON end character
JSON_MAIN_OBJECT_START	string	"export": {\n	Json export object header
JSON_ARRAY_START	string	[\n	JSON Array Start character
JSON_ARRAY_END	string	]	JSON Array End character

Methods

__construct - Public

Called automatically, creates temporary file to put data in.

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__destruct - Public

Called automatically, removes temporary file with data.

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addMark - Public

Add selected mark to export file

Arguments

Variable	Type	Default	Required	Description
$markData	stdObj	N/A	Yes	Single mark data with all dependent information about labels, tags etc.

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addMeta - Public

Adds metadata about export file, like number of records, file format revision etc. Data comes in key/value pair format.

Arguments

Variable	Type	Default	Required	Description
$metaName	string	N/A	Yes	Metadata key
$metaValue	string	N/A	Yes	Metadata value

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getFileForOutput - Public

Marks file as completed and returns file handle to the file containing data.