Traverse through nodes and consume data into Sling Model

Question

I have an asset in /content/dam/myproject/<assetFile> the hierarchy being :I will get the path of the image from dialog and I have injected the same in the sling model.@586265
private String imagePath My ultimate aim is to traverse to the metadata node and get a certain property from there. Can someone please help me with the Java code for that? Also please let me know how I will get that data into frontend via HTL.Thanks!

EstebanBustamante · Accepted Answer

Hi, you can just adapt the resource (your image block.png) to an Asset object and then get the AssetMetaData object

You can use something like this:

@Model(adaptables = { SlingHttpServletRequest.class,
        Resource.class }, defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL, resourceType = "myproject/components/content/image")
@Exporter(name = "jackson", extensions = "json", options = {
        @ExporterOption(name = "MapperFeature.SORT_PROPERTIES_ALPHABETICALLY", value = "true")
})
public class ImageModel {
    private static Logger LOG = LoggerFactory.getLogger(ImageModel.class);

    @SlingObject
    private SlingHttpServletRequest request;

    private String imageMetaData;

    /**
     *  Returns the property tiff:ImageWidth from the metadata
     */
    public String getImageMetaData() {
        String url = request.getRequestURI();
        //You can get this path dynamically from HTL or resolve by other means, for now is just hardcoded
        Resource resource = request.getResourceResolver().getResource("/content/dam/my-project/image/image.png");
        Asset asset = resource.adaptTo(Asset.class);
        String width = asset.getMetadataValue("tiff:ImageWidth");
        return this.imageMetaData;
    }
}

And then use it in the HTL like this:

<!--/* Invoke the model you have created and access the method where you have obtained the information */-->
<div data-sly-use.model="com.my.models.package.ImageModel">
    <p>${model.imageMetaData @ context='html'}</p>
</div>

You can learn more here:
https://redquark.org/aem/day-07-sling-models/

http://www.aemcq5tutorials.com/tutorials/sling-model-sightly-aem/

${model.imageMetaData @ context='html'}

You can learn more here:https://redquark.org/aem/day-07-sling-models/http://www.aemcq5tutorials.com/tutorials/sling-model-sightly-aem/

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