ImageCropper

@Named
@SessionScoped
public class CropUploaderBean implements Serializable {
    
    private CroppedImage croppedImage;
    
    private UploadedFile originalImageFile;

    public CroppedImage getCroppedImage() {
        return croppedImage;
    }

    public void setCroppedImage(CroppedImage croppedImage) {
        this.croppedImage = croppedImage;
    }
    
    public UploadedFile getOriginalImageFile() {
        return originalImageFile;
    }
    
    public void handleFileUpload(FileUploadEvent event) {
        this.originalImageFile = null;
        this.croppedImage = null;
        UploadedFile file = event.getFile();
        if(file != null && file.getContent() != null && file.getContent().length > 0 && file.getFileName() != null) {
            this.originalImageFile = file;
            FacesMessage msg = new FacesMessage("Successful", this.originalImageFile.getFileName() + " is uploaded.");
            FacesContext.getCurrentInstance().addMessage(null, msg);
        }
    }

    public void crop() {
        if(this.croppedImage == null || this.croppedImage.getBytes() == null || this.croppedImage.getBytes().length == 0) {
            FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, "Error", "Cropping failed."));
        }
        else {
            FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Success", "Cropped successfully."));
        }
    }
    
    public StreamedContent getImage() {
        
        FacesContext context = FacesContext.getCurrentInstance();

        StreamedContent result = null;
        if (context.getCurrentPhaseId() == PhaseId.RENDER_RESPONSE || this.originalImageFile == null
                || this.originalImageFile.getContent() == null || this.originalImageFile.getContent().length == 0) {
            result = new DefaultStreamedContent();
        }
        else {
            result = DefaultStreamedContent.builder().contentType(this.originalImageFile.getContentType()).stream(() -> {
                try {
                    return new ByteArrayInputStream(this.originalImageFile.getContent());
                } catch (Exception e) {
                    e.printStackTrace();
                    return null;
                }
            }).build();
        }
        
        return result;
    }

    public StreamedContent getCropped() {
        
        FacesContext context = FacesContext.getCurrentInstance();

        StreamedContent result = null;
        if (context.getCurrentPhaseId() == PhaseId.RENDER_RESPONSE || this.croppedImage == null
                || this.croppedImage.getBytes() == null || this.croppedImage.getBytes().length == 0) {
            result = new DefaultStreamedContent();
        }
        else {
            result = DefaultStreamedContent.builder().contentType(this.originalImageFile.getContentType()).stream(() -> {
                try {
                    return new ByteArrayInputStream(this.croppedImage.getBytes());
                } catch (Exception e) {
                    e.printStackTrace();
                    return null;
                }
            }).build();
        }
        
        return result;
    }
    
}