Unified api to read the properties

[k3b]

If i want to read metadata i have to look into the sourcecode of public void showMetadata() to find out how to get data from each Metadata implementation.

As a pixymeta user
i want a simple uniform api to get the desired meta-content
so that i donot have to learn much of the internals of the implementation.

I have started implementing this in my local IMetaApi branch of the https://github.com/k3b/pixymeta-android/ repository.

The api can be used like this.

Map<MetadataType, Metadata> metadataMap = Metadata.readMetadata(dir + "test.jpg");

StringBuffer result = new StringBuffer();

for (IMetadataDirectory directory : metadataMap.values()) {
    List<IMetadataTag> tags = directory.getTags();

    if ((tags != null) && (tags.size() > 0)) {
        for (IMetadataTag tag : tags) {
            result.append(tag.getName()).append(" : ").append(tag.getValue()).append("\n");
        }
    }

    final List<IMetadataDirectory> subdirectories = directory.getSubdirectories();

    if (subdirectories != null) {
        for (IMetadataDirectory sub : subdirectories) {
            ...
        }
    }
}

[dragon66]

@k3b When I wrote pixymeta-android, I was having both metadata read and write functions in mind that's how the current pixymeta-android behaves.

Several of the metadata extracting tools define metadata based on image types and contain a common interface to view the metadata. I believe what you are trying to do is something similar to what metada-extractor does.

Anyway, this will by no doubt benefit the users at least with respect to extracting metadata.