Java tutorial
/* * #%L * ACS AEM Commons Bundle * %% * Copyright (C) 2015 Adobe * %% * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * #L% */ package com.adobe.acs.commons.wcm.views.impl; import com.adobe.acs.commons.util.ParameterUtil; import com.day.cq.wcm.api.Page; import com.day.cq.wcm.api.PageManager; import com.day.cq.wcm.api.WCMMode; import com.day.cq.wcm.api.components.Component; import com.day.cq.wcm.commons.WCMUtils; import org.apache.commons.lang.ArrayUtils; import org.apache.commons.lang.StringUtils; import org.apache.felix.scr.annotations.Activate; import org.apache.felix.scr.annotations.Property; import org.apache.felix.scr.annotations.sling.SlingServlet; import org.apache.sling.api.SlingHttpServletRequest; import org.apache.sling.api.SlingHttpServletResponse; import org.apache.sling.api.resource.AbstractResourceVisitor; import org.apache.sling.api.resource.Resource; import org.apache.sling.api.resource.ValueMap; import org.apache.sling.api.servlets.SlingSafeMethodsServlet; 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.commons.osgi.PropertiesUtil; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.servlet.ServletException; import java.io.IOException; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import java.util.TreeSet; @SuppressWarnings("serial") @SlingServlet(label = "ACS AEM Commons - WCM Views Servlet", methods = { "GET" }, resourceTypes = { "cq/Page" }, selectors = { "wcm-views" }, extensions = { "json" }, metatype = true) public class WCMViewsServlet extends SlingSafeMethodsServlet { private static final Logger log = LoggerFactory.getLogger(WCMViewsServlet.class); private static final String[] DEFAULT_VIEWS = new String[] {}; private Map<String, String[]> defaultViews = new HashMap<String, String[]>(); @Property(label = "WCM Views by Path", description = "Views to add to the Sidekick by default. Takes format [/path=view-1;view-2]", cardinality = Integer.MAX_VALUE, value = {}) public static final String PROP_DEFAULT_VIEWS = "wcm-views"; @Override protected final void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) throws ServletException, IOException { response.setCharacterEncoding("UTF-8"); response.setContentType("application/json"); if (WCMMode.DISABLED.equals(WCMMode.fromRequest(request))) { response.setStatus(SlingHttpServletResponse.SC_NOT_FOUND); response.getWriter().write(""); return; } /* Valid WCMMode */ final PageManager pageManager = request.getResourceResolver().adaptTo(PageManager.class); final Page page = pageManager.getContainingPage(request.getResource()); final WCMViewsResourceVisitor visitor = new WCMViewsResourceVisitor(); visitor.accept(page.getContentResource()); final Set<String> viewSet = new HashSet<String>(visitor.getWCMViews()); // Get the Views provided by the Servlet for (final Map.Entry<String, String[]> entry : this.defaultViews.entrySet()) { if (StringUtils.startsWith(page.getPath(), entry.getKey())) { viewSet.addAll(Arrays.asList(entry.getValue())); } } final List<String> views = new ArrayList<String>(viewSet); Collections.sort(views); log.debug("Collected WCM Views {} for Page [ {} ]", views, page.getPath()); final JSONArray jsonArray = new JSONArray(); for (final String view : views) { final JSONObject json = new JSONObject(); try { json.put("title", StringUtils.capitalize(view) + " View"); json.put("value", view); jsonArray.put(json); } catch (JSONException e) { log.error("Unable to build WCM Views JSON output.", e); } } response.getWriter().write(jsonArray.toString()); } private static class WCMViewsResourceVisitor extends AbstractResourceVisitor { final Set<String> views = new TreeSet<String>(); public final List<String> getWCMViews() { return new ArrayList<String>(this.views); } @Override protected void visit(Resource resource) { final ValueMap properties = resource.adaptTo(ValueMap.class); final String[] resourceViews = properties.get(WCMViewsFilter.PN_WCM_VIEWS, String[].class); if (ArrayUtils.isNotEmpty(resourceViews)) { this.views.addAll(Arrays.asList(resourceViews)); } final Component component = WCMUtils.getComponent(resource); if (component != null) { final String[] componentViews = component.getProperties().get(WCMViewsFilter.PN_WCM_VIEWS, String[].class); if (ArrayUtils.isNotEmpty(componentViews)) { this.views.addAll(Arrays.asList(componentViews)); } } } } @Activate protected final void activate(final Map<String, String> config) { final String[] tmp = PropertiesUtil.toStringArray(config.get(PROP_DEFAULT_VIEWS), DEFAULT_VIEWS); this.defaultViews = ParameterUtil.toMap(tmp, "=", ";"); } }