Resize an image resource in CQ5 using Java

I already posted the question on stackoverflow, but since I am not allowed yet to post a solution, I'll post it here. I found a quite low level approach, to resizes a image identified by jcrPathToImage to int targetWidth and int targetHeight.

Resize Image

Resource resource = getResourceResolver().getResource(jcrPathToImage); Asset asset = resource.adaptTo(Asset.class); Layer layer = new Layer(asset.getOriginal().getStream()) layer.resize(targetWidth, targetHeight);

Create new rendition in JCR

Extract mime type of the original image

Image image = new Image(resource); String mimeType = image.getMimeType();

Store the resized Image using its asset representation.

ByteArrayOutputStream bout = null; ByteArrayInputStream bin = null; try { bout = new ByteArrayOutputStream(2048); layer.write(mimeType, 1, bout); bin = new ByteArrayInputStream(bout.toByteArray()); asset.addRendition(resizedImgName, bin, mimeType); } finally { // close streams ... }

This may be useful to generate thumbnails.