com.day.cq.dam.drive.servlet.GetChildrenServlet Maven / Gradle / Ivy
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package com.day.cq.dam.drive.servlet;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import javax.jcr.Node;
import javax.jcr.Session;
import javax.servlet.ServletException;
import org.apache.commons.collections.Predicate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferencePolicy;
import org.apache.felix.scr.annotations.ReferencePolicyOption;
import org.apache.felix.scr.annotations.Service;
import org.apache.jackrabbit.JcrConstants;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.commons.json.JSONArray;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.JSONObject;
import org.apache.sling.resource.collection.ResourceCollection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.day.cq.commons.servlets.AbstractPredicateServlet;
import com.day.cq.dam.api.AssetManager;
import com.day.cq.dam.api.DamConstants;
import com.day.cq.dam.drive.util.DriveRenditionPicker;
import com.day.cq.dam.drive.util.DriveUtil;
import com.day.cq.search.PredicateGroup;
import com.day.cq.search.Query;
import com.day.cq.search.QueryBuilder;
@Component(metatype = true)
@Service
@Properties({
@org.apache.felix.scr.annotations.Property(name = "sling.servlet.resourceTypes", value = "sling/servlet/default", propertyPrivate = true),
@Property(name = "sling.servlet.methods", value = { "GET" }),
@Property(name = "sling.servlet.extensions", value = "json"),
@Property(name = "sling.servlet.selectors", value = { "driveGetChildren",
"driveGetCollection" }) })
/**
* This servlet implements the IGetChildrenHandler of Drive API.
*/
public class GetChildrenServlet extends AbstractPredicateServlet {
/** logger */
private static Logger log = LoggerFactory.getLogger(GetChildrenServlet.class);
@Reference(policyOption = ReferencePolicyOption.GREEDY)
DriveRenditionPicker picker;
@Reference(policy = ReferencePolicy.STATIC)
private QueryBuilder queryBuilder;
/**
* {@inheritDoc}
*/
@Override
protected void doGet(SlingHttpServletRequest request,
SlingHttpServletResponse response, Predicate predicate)
throws ServletException, IOException {
// get the selectors array
String[] dTypes = DriveUtil.getDataType(request);
String selectorString = request.getRequestPathInfo().getSelectorString();
Resource resource = request.getResource();
ResourceResolver resolver = resource.getResourceResolver();
JSONObject obj = null;
if ("driveGetCollection".equals(selectorString)) {
try {
obj = handleCollection(resource, resolver, request, predicate,
dTypes);
} catch (Exception e) {
log.error("Error in Handling collection",e);
}
} else {
try {
obj = processFolder(request, predicate, dTypes);
} catch (Exception e) {
log.error("Error in Handling Folder ",e);
}
}
response.addHeader("Content-Type", "application/json;charset=utf-8");
try {
obj.write(response.getWriter());
} catch (JSONException e) {
log.error("Error in returning the JSON response ",e);
}
}
protected JSONObject handleCollection(Resource resource,
ResourceResolver resolver, SlingHttpServletRequest request,
Predicate predicate, String[] dTypes) throws Exception {
JSONObject obj = new JSONObject();
final AssetManager assetManager = request.getResourceResolver().adaptTo(
AssetManager.class);
JSONObject parentObj = new JSONObject();
JSONObject self = new JSONObject();
DriveUtil.fillRecipeData(request, dTypes, resource, picker,
assetManager, self);
JSONArray jsonArr = new JSONArray();
Resource parent = resource.getParent();
DriveUtil.fillRecipeData(request, dTypes, parent, picker, assetManager,
parentObj);
obj.put("self", self);
obj.put("parent", parentObj);
if (resource.adaptTo(ResourceCollection.class) == null) {
Map map = new HashMap();
map.put("path", DamConstants.MOUNTPOINT_ASSETS);
map.put("group.0_property", "sling:resourceType");
map.put("group.0_property.0_value", "dam/collection");
map.put("group.0_property.1_value", "dam/smartcollection");
// because of a bug in 5.6.1 resource type & resource super type
// were being set on collections in reverse order
// search for old collections with super type as dam/collection
map.put("group.1_property", "sling:resourceSuperType");
map.put("group.1_property.value", "dam/collection");
map.put("group.p.or", "true");
map.put("type", JcrConstants.NT_UNSTRUCTURED);
map.put("p.limit", "0");
Session session = resolver.adaptTo(Session.class);
Query query = queryBuilder.createQuery(PredicateGroup.create(map),
session);
query.setHitsPerPage(0); // to return all the results
Iterator it = query.getResult().getResources();
while (it.hasNext()) {
Resource kid = it.next();
processChildren(request, predicate, dTypes, assetManager,
jsonArr, kid);
}
} else {
// we are browsing a particular collection
if (!DriveUtil.isSmartCollection(resource)) {
Resource members = resource.getChild("sling:members");
Iterator itr = members.getChildren().iterator();
while (itr != null && itr.hasNext()) {
try {
Resource m = itr.next();
String orginalPath = m.adaptTo(Node.class).getProperty(
"sling:resource").getString();
Resource orig = resolver.getResource(orginalPath);
processChildren(request, predicate, dTypes,
assetManager, jsonArr, orig);
} catch (Exception e) {
log.warn("Error in adding a collection member", e);
}
}
}
}
obj.put("children", jsonArr);
return obj;
}
protected JSONObject processFolder(SlingHttpServletRequest request,
Predicate predicate, String[] dTypes) {
Resource resource = request.getResource();
Resource parent = resource.getParent();
Iterator kidz = resource.listChildren();
final AssetManager assetManager = request.getResourceResolver().adaptTo(
AssetManager.class);
JSONObject obj = new JSONObject();
JSONObject parentObj = new JSONObject();
JSONArray jsonArr = new JSONArray();
try {
DriveUtil.fillRecipeData(request, dTypes, parent, picker,
assetManager, parentObj);
obj.put("parent", parentObj);
JSONObject self = new JSONObject();
DriveUtil.fillRecipeData(request, dTypes, resource, picker,
assetManager, self);
obj.put("self", self);
while (kidz.hasNext()) {
Resource kid = kidz.next();
processChildren(request, predicate, dTypes, assetManager,
jsonArr, kid);
}
obj.put("children", jsonArr);
return obj;
} catch (Exception e) {
log.error("Error in returning children", e);
}
return null;
}
protected void processChildren(SlingHttpServletRequest request,
Predicate predicate, String[] dTypes,
final AssetManager assetManager, JSONArray jsonArr, Resource kid) {
try {
if (predicate == null || predicate.evaluate(kid)) {
JSONObject json = new JSONObject();
DriveUtil.fillRecipeData(request, dTypes, kid, picker,
assetManager, json);
jsonArr.put(json);
}
} catch (Exception e) {
log.warn("Failed processing resource ", e);
}
}
}
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