Get a node form currenPage in CQ5 - aem

Question

I have a component that needs to fetch properties from another component on the same page.
Is there a way to get a component's NODE object from currentPage ?
I have the name of the node I need to fetch available in the code.

Answer 1

Assuming the node you need is in Page/jcr:content/yournode:
the Page object has a method getContentResource() which returns you the jcr:content resource node by default. You can also use page.getContentResource("yournode") to get a specific node below jcr:content.
If your node, for some reason is sibling to jcr:content (it shouldn't btw), you can your iterate the children of a resource using resource.listChildren().
Remember, this is all Sling API, so you are managing resources, not nodes. You can get a JCR Node from a resource using resource.adaptTo(Node.class)

Answer 2

Usually every Page class has a method for retrieving nodes within jcr:content that’s a little cleaner:
Node node = CurrentPage.getContentResource("COMPONENTNAME").adaptTo(Node.class);
Developers should check for a resource's existence before adapting it to a Node.
Now that we have a node, we can extract properties from that node.
String title = node.getProperty("jcr:title").getString();
This way you can fetch any properties of a component.

Answer 3

I would like to add that this can be solved in more clean way by delegating request to a servlet provided the problem being solved requires separation of concerns - separate the view from the controller logic.
LINK EXPLAINING IN DETAIL HOW VALIDATION IS DONE USING SLING SERVLETS
Adds validator to a form using below logic that calls the sling servlet hosted
var url = CQ.HTTP.addParameter(dialog.path + '.validator.json', 'value', value);
var result = CQ.HTTP.eval(url);
and in the servlet we access the node and its parents using below logic
final Node currentNode = request.getResource().adaptTo(Node.class);
try {
final Node par = currentNode.getParent();
final NodeIterator nodes = par.getNodes();
// get all form names for the current paragraph system
while (nodes.hasNext()) { //and the business logic
See more at: http://www.citytechinc.com/us/en/blog/2012/04/complex_cq5_dialog_validation.html#sthash.wey3cwdI.dpuf