RFC #0143: Image metadata API enhancements

at 2007-11-11 in RFCs by friebe (0 comments)

Scope of Change

The fromFile() methods will throw different exceptions for different cases of errors instead of only an ImagingException.
There will be an optional default argument to the IptcData::fromFile() and ExifData::fromFile() methods which will be returned in case no meta data can be found.
There will be a public EMPTY field in the ExifData and IptcData classes which will represent empty instances of the respective class.

Rationale

Be able to distinguish the cases when data cannot be read for I/O errors and when data is not existant or malformed.
Make handling of "no metadata found"-situations easier.

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