For your requirement, you can leverage the AssetReferenceSearch API which can give the details of Assets used in a page (node of type cq:Page).
You can use the following code to accomplish your task -
package org.redquark.aem.assets.core;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import javax.jcr.Node;
import javax.servlet.Servlet;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.osgi.service.component.annotations.Component;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.day.cq.dam.api.Asset;
import com.day.cq.dam.commons.util.AssetReferenceSearch;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
/**
* @author Anirudh Sharma
*
*/
@Component(
service = Servlet.class,
property = {
"sling.servlet.methods=GET",
"sling.servlet.resourceTypes=cq/Page",
"sling.servlet.selectors=assetreferences",
"sling.servlet.extensions=json",
"service.ranking=1000"
}
)
public class FindReferencedAssetsServlet extends SlingSafeMethodsServlet {
// Generated serial version UID
private static final long serialVersionUID = 8446564170082865006L;
private final Logger log = LoggerFactory.getLogger(this.getClass());
private static final String DAM_ROOT = "/content/dam";
@Override
protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) {
response.setContentType("application/json");
Gson gson = new GsonBuilder().setPrettyPrinting().create();
try {
// Get the current node reference from the resource object
Node currentNode = request.getResource().adaptTo(Node.class);
if (currentNode == null) {
// Every adaptTo() can return null, so let's handle the case here
// However, it is very unlikely
log.error("Cannot adapt resource {} to a node", request.getResource().getPath());
response.getOutputStream().print(new Gson().toString());
return;
}
// Using AssetReferenceSearch which will do all the work for us
AssetReferenceSearch assetReferenceSearch = new AssetReferenceSearch(currentNode, DAM_ROOT,
request.getResourceResolver());
Map<String, Asset> result = assetReferenceSearch.search();
List<AssetDetails> assetList = new LinkedList<>();
for (String key : result.keySet()) {
Asset asset = result.get(key);
AssetDetails assetDetails = new AssetDetails(asset.getName(), asset.getPath(), asset.getMimeType());
assetList.add(assetDetails);
}
String jsonOutput = gson.toJson(assetList);
response.getOutputStream().println(jsonOutput);
} catch (Exception e) {
log.error(e.getMessage(), e);
}
}
}
The corresponding AssetDetails model class is as follows -
package org.redquark.aem.assets.core;
/**
* @author Anirudh Sharma
*/
public class AssetDetails {
private String name;
private String path;
private String mimeType;
/**
* @param name
* @param path
* @param mimeType
*/
public AssetDetails(String name, String path, String mimeType) {
this.name = name;
this.path = path;
this.mimeType = mimeType;
}
/**
* @return the name
*/
public String getName() {
return name;
}
/**
* @param name the name to set
*/
public void setName(String name) {
this.name = name;
}
/**
* @return the path
*/
public String getPath() {
return path;
}
/**
* @param path the path to set
*/
public void setPath(String path) {
this.path = path;
}
/**
* @return the mimeType
*/
public String getMimeType() {
return mimeType;
}
/**
* @param mimeType the mimeType to set
*/
public void setMimeType(String mimeType) {
this.mimeType = mimeType;
}
}
Now, you can invoke this servlet by the following request -
http://localhost:4502/content/we-retail/language-masters/en/men.assetreferences.json.
This will give output in the following format
[
{
"name": "running-trail-man.jpg",
"path": "/content/dam/we-retail/en/activities/running/running-trail-man.jpg",
"mimeType": "image/jpeg"
},
{
"name": "enduro-trail-jump.jpg",
"path": "/content/dam/we-retail/en/activities/biking/enduro-trail-jump.jpg",
"mimeType": "image/jpeg"
},
{
"name": "indoor-practicing.jpg",
"path": "/content/dam/we-retail/en/activities/climbing/indoor-practicing.jpg",
"mimeType": "image/jpeg"
}
]
You can edit the AssetDetails class as per your requirement.
I hope this helps. Happy Coding!!!
