[EAK-558] Reverted to use of OptionSource/OptionProvider as Lists JSON renderer

core/pom.xml

@@ -114,10 +114,6 @@
             <groupId>com.google.code.findbugs</groupId>
             <artifactId>jsr305</artifactId>
         </dependency>
-        <dependency>
-            <groupId>com.google.code.gson</groupId>
-            <artifactId>gson</artifactId>
-        </dependency>
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>

core/src/main/java/com/exadel/aem/toolkit/core/optionprovider/servlets/OptionProviderServlet.java

@@ -20,7 +20,6 @@
 import javax.annotation.Nonnull;
 import javax.servlet.Servlet;
 import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletResponse;
 
 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.sling.api.SlingHttpServletRequest;
@@ -73,28 +72,28 @@ public class OptionProviderServlet extends SlingSafeMethodsServlet {
      * @param response {@code SlingHttpServletResponse} instance
      */
     @Override
-    protected void doGet(@Nonnull SlingHttpServletRequest request, @Nonnull SlingHttpServletResponse response) throws ServletException, IOException {
+    protected void doGet(@Nonnull SlingHttpServletRequest request, @Nonnull SlingHttpServletResponse response)
+        throws ServletException, IOException {
 
         List<Resource> options = optionProvider.getOptions(request);
 
-        if (CollectionUtils.isEmpty(options) && isJsonOutput(request)) {
-            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+        if (!isJsonOutput(request)) {
+            DataSource ds = new SimpleDataSource(options.iterator());
+            request.setAttribute(DataSource.class.getName(), ds);
             return;
         }
 
-        if (isJsonOutput(request)) {
-            response.setContentType(CoreConstants.CONTENT_TYPE_JSON);
-            response.setCharacterEncoding(StandardCharsets.UTF_8.toString());
-            try {
-                response.getWriter().print(getJsonOutput(options));
-            } catch (JSONException | NullPointerException e) {
-                throw new ServletException(e);
-            }
+        response.setCharacterEncoding(StandardCharsets.UTF_8.toString());
+        response.setContentType(CoreConstants.CONTENT_TYPE_JSON);
+        if (CollectionUtils.isEmpty(options)) {
+            response.getWriter().write(CoreConstants.ARRAY_OPENING + CoreConstants.ARRAY_CLOSING);
             return;
         }
-
-        DataSource ds = new SimpleDataSource(options.iterator());
-        request.setAttribute(DataSource.class.getName(), ds);
+        try {
+            response.getWriter().print(getJsonOutput(options));
+        } catch (JSONException | NullPointerException e) {
+            throw new ServletException(e);
+        }
     }
 
     /**
@@ -103,6 +102,9 @@ protected void doGet(@Nonnull SlingHttpServletRequest request, @Nonnull SlingHtt
      * @return True or false
      */
     private static boolean isJsonOutput(SlingHttpServletRequest request) {
+        if (QUERY_VALUE_JSON.equalsIgnoreCase(request.getRequestPathInfo().getExtension())) {
+            return true;
+        }
         RequestParameter jsonParameter = request.getRequestParameter(QUERY_KEY_OUTPUT);
         if (jsonParameter == null) {
             return false;

docs/content/authoring-tools/etoolbox-lists.md

@@ -126,4 +126,6 @@ public class MyComponent {
 
 ## Retrieving Lists' content via HTTP
 
-You website's authoring logic may require fetching the content of a list via HTTP - e.g., with an AJAX request. EToolbox provides a servlet that delivers a flat array of items in JSON format. The data will be stripped of all the "system" properties like _jcr:created_, etc. Request it with the `.list.` selector and `.json` extension. Example: `/content/path/to/your/lists/sampleList.list.json`.
+Your website's authoring logic may require fetching the content of a list via HTTP — e.g., with an AJAX request. This can be achieved with the OptionSource / [OptionProvider](../dev-tools/option-provider.md) servlet. Make a GET request to `/apps/etoolbox-authoring-kit/datasources/option-provider.json?path=<path_to_EToolbox_list>`.
+
+By default, the servlet returns a JSON array of objects with `text` and `value` properties matching the same-named attributes of list items. You will probably want to modify the mapping. To say, a typical EToolbox List makes use of `jcr:title` and `value` attributes. Add `&textMember=jcr:title` to expose _jcr:title_. Similarly, you can alter the `valueMember` parameter, add some `attributeMembers`, etc. Please remember that if an item doesn't have a non-blank mapping for both _text_ and _value_, it won't be displayed.

pom.xml

@@ -489,12 +489,6 @@
                 <version>3.0.2</version>
                 <scope>provided</scope>
             </dependency>
-            <dependency>
-                <groupId>com.google.code.gson</groupId>
-                <artifactId>gson</artifactId>
-                <version>2.11.0</version>
-                <scope>test</scope>
-            </dependency>
             <dependency>
                 <groupId>com.codeborne</groupId>
                 <artifactId>selenide</artifactId>