chainingOptions.java

//Checking for null through an object graph quickly becomes unwieldy
if (article.getContributor() != null &&
        article.getContributor().getImage() != null &&
        article.getContributor().getImage().getSize() != null) {

    Size size = article.getContributor().getImage().getSize();
    setContributorImageSize(size.getWidth(), size.getHeight());
}

//Chaining multiple optional values using bind and map
article.getContributor()
        .bind(Contributor::getImage)
        .map(DisplayImage::getSize)
        .map(size -> setContributorImageSize(size.getWidth(), size.getHeight()));