[sling-whiteboard] branch master updated: Adding a method to list the renditions available on a file

[dk...@apache.org]

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dklco pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/sling-whiteboard.git


The following commit(s) were added to refs/heads/master by this push:
     new 40e0a7b  Adding a method to list the renditions available on a file
40e0a7b is described below

commit 40e0a7b9ce03a267deb2f268bd659fe598aeaa68
Author: Dan Klco <kl...@adobe.com>
AuthorDate: Fri Jul 16 14:50:26 2021 -0400

    Adding a method to list the renditions available on a file
---
 .../org/apache/sling/thumbnails/RenditionSupport.java    | 10 ++++++++++
 .../sling/thumbnails/internal/RenditionSupportImpl.java  | 16 ++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/org.apache.sling.thumbnails/src/main/java/org/apache/sling/thumbnails/RenditionSupport.java b/org.apache.sling.thumbnails/src/main/java/org/apache/sling/thumbnails/RenditionSupport.java
index f389e89..f655e24 100644
--- a/org.apache.sling.thumbnails/src/main/java/org/apache/sling/thumbnails/RenditionSupport.java
+++ b/org.apache.sling.thumbnails/src/main/java/org/apache/sling/thumbnails/RenditionSupport.java
@@ -17,6 +17,7 @@
 package org.apache.sling.thumbnails;
 
 import java.io.InputStream;
+import java.util.List;
 
 import org.apache.sling.api.resource.PersistenceException;
 import org.apache.sling.api.resource.Resource;
@@ -52,6 +53,15 @@ public interface RenditionSupport {
     InputStream getRenditionContent(@NotNull Resource file, @NotNull String renditionName);
 
     /**
+     * Retrieves all of the renditions for the specified file.
+     * 
+     * @param file the file from which to retrieve the renditions
+     * @return the renditions
+     */
+    @NotNull
+    List<Resource> listRenditions(@NotNull Resource file);
+
+    /**
      * Returns true if the requested rendition exists for the specified file.
      * 
      * @param file          the file to check
diff --git a/org.apache.sling.thumbnails/src/main/java/org/apache/sling/thumbnails/internal/RenditionSupportImpl.java b/org.apache.sling.thumbnails/src/main/java/org/apache/sling/thumbnails/internal/RenditionSupportImpl.java
index a17c13d..cad8477 100644
--- a/org.apache.sling.thumbnails/src/main/java/org/apache/sling/thumbnails/internal/RenditionSupportImpl.java
+++ b/org.apache.sling.thumbnails/src/main/java/org/apache/sling/thumbnails/internal/RenditionSupportImpl.java
@@ -17,10 +17,13 @@
 package org.apache.sling.thumbnails.internal;
 
 import java.io.InputStream;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Optional;
+import java.util.stream.StreamSupport;
 
 import org.apache.jackrabbit.JcrConstants;
 import org.apache.sling.api.resource.LoginException;
@@ -65,6 +68,19 @@ public class RenditionSupportImpl implements RenditionSupport {
     }
 
     @Override
+    public @NotNull List<Resource> listRenditions(@NotNull Resource file) {
+        List<Resource> renditions = new ArrayList<>();
+        if (this.supportsRenditions(file)) {
+            Optional.ofNullable(file.getChild(thumbnailSupport.getRenditionPath(file.getResourceType())))
+                    .ifPresent(renditionFolder -> {
+                        StreamSupport.stream(renditionFolder.getChildren().spliterator(), false)
+                                .filter(c -> JcrConstants.NT_FILE.equals(c.getResourceType())).forEach(renditions::add);
+                    });
+        }
+        return renditions;
+    }
+
+    @Override
     public boolean renditionExists(@NotNull Resource file, @NotNull String renditionName) {
         return getRendition(file, renditionName) != null;
     }