Added skip limit methods for fetching assets

CHANGELOG.md

@@ -1,5 +1,12 @@
 # CHANGELOG
 
+## v2.0.3
+
+### Date: 3-March-2025
+
+- Added skip limit methods for Assets
+- Resolved a bug
+
 ## v2.0.2
 
 ### Date: 5-December-2024

src/main/java/com/contentstack/sdk/AssetLibrary.java

@@ -133,6 +133,101 @@ public int getCount() {
         return count;
     }
 
+     /**
+     * Add param assetlibrary.
+     *
+     * @param paramKey   the param key
+     * @param paramValue the param value
+     * @return the assetlibrary
+     *
+     *         <br>
+     *         <br>
+     *         <b>Example :</b><br>
+     *
+     *         <pre class="prettyprint">
+     *         Stack stack = Contentstack.stack("apiKey", "deliveryToken", "environment");
+     *         AssetLibrary assetLibObject = stack.assetlibrary();
+     *         assetLibObject.addParam();
+     *         </pre>
+     */
+    public AssetLibrary addParam(@NotNull String paramKey, @NotNull Object paramValue) {
+        urlQueries.put(paramKey, paramValue);
+        return this;
+    }
+
+    /**
+     * Remove param key assetlibrary.
+     *
+     * @param paramKey   the param key
+     * @return the assetlibrary
+     *
+     *         <br>
+     *         <br>
+     *         <b>Example :</b><br>
+     *
+     *         <pre class="prettyprint">
+     *         Stack stack = Contentstack.stack("apiKey", "deliveryToken", "environment");
+     *         AssetLibrary assetLibObject = stack.assetlibrary();
+     *         assetLibObject.removeParam(paramKey);
+     *         </pre>
+     */
+    public AssetLibrary removeParam(@NotNull String paramKey){
+         if(urlQueries.has(paramKey)){
+            urlQueries.remove(paramKey);
+        }
+        return this;
+    }
+
+
+
+    /**
+     * The number of objects to skip before returning any.
+     *
+     * @param number No of objects to skip from returned objects
+     * @return {@link Query} object, so you can chain this call.
+     * <p>
+     * <b> Note: </b> The skip parameter can be used for pagination,
+     * &#34;skip&#34; specifies the number of objects to skip in the response. <br>
+     *
+     * <br>
+     * <br>
+     * <b>Example :</b><br>
+     *
+     * <pre class="prettyprint">
+     *          Stack stack = Contentstack.stack( "apiKey", "deliveryToken", "environment");
+     *          AssetLibrary assetLibObject = stack.assetlibrary.skip(4);<br>
+     *         </pre>
+     */
+
+    public AssetLibrary skip (@NotNull int number) {
+        urlQueries.put("skip",number);
+        return this;
+    }
+
+    /**
+     * A limit on the number of objects to return.
+     *
+     * @param number No of objects to limit.
+     * @return {@link Query} object, so you can chain this call.
+     * <p>
+     * <b> Note:</b> The limit parameter can be used for pagination, &#34;
+     * limit&#34; specifies the number of objects to limit to in the response. <br>
+     *
+     * <br>
+     * <br>
+     * <b>Example :</b><br>
+     *
+     * <pre class="prettyprint">
+     *          Stack stack = Contentstack.stack( "apiKey", "deliveryToken", "environment");
+     *           AssetLibrary assetLibObject = stack.assetlibrary.limit(4);<br>
+     *         </pre>
+     */
+
+    public AssetLibrary limit (@NotNull int number) {
+        urlQueries.put("limit", number);
+        return this;
+    }
+
     /**
      * Fetch all.
      *
@@ -180,6 +275,10 @@ public void getResultObject(List<Object> objects, JSONObject jsonObject, boolean
 
         List<Asset> assets = new ArrayList<>();
 
+        // if (objects == null || objects.isEmpty()) {
+        //     System.out.println("Objects list is null or empty");
+        // }
+
         if (objects != null && !objects.isEmpty()) {
             for (Object object : objects) {
                 AssetModel model = (AssetModel) object;
@@ -193,7 +292,10 @@ public void getResultObject(List<Object> objects, JSONObject jsonObject, boolean
                 asset.setTags(model.tags);
                 assets.add(asset);
             }
-        }
+        } 
+        // else {
+        // System.out.println("Object is not an instance of AssetModel");
+        // }
 
         if (callback != null) {
             callback.onRequestFinish(ResponseType.NETWORK, assets);

src/main/java/com/contentstack/sdk/AssetsModel.java

@@ -2,10 +2,10 @@
 
 import java.util.ArrayList;
 import java.util.List;
+
 import org.json.JSONArray;
 import org.json.JSONObject;
 
-
 /**
  * The type Assets model.
  */

src/test/java/com/contentstack/sdk/TestAssetLibrary.java

@@ -6,7 +6,6 @@
 import java.util.List;
 import java.util.logging.Logger;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
 
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
@@ -24,15 +23,15 @@ void testNewAssetLibrary() {
             public void onCompletion(ResponseType responseType, List<Asset> assets, Error error) {
                 Asset model = assets.get(0);
                 Assertions.assertTrue(model.getAssetUid().startsWith("blt"));
-                assertEquals("image/png", model.getFileType());
-                assertEquals("13006", model.getFileSize());
-                assertEquals("iot-icon.png", model.getFileName());
+                Assertions.assertEquals("image/png", model.getFileType());
+                Assertions.assertEquals("13006", model.getFileSize());
+                Assertions.assertEquals("iot-icon.png", model.getFileName());
                 Assertions.assertTrue(model.getUrl().endsWith("iot-icon.png"));
                 Assertions.assertTrue(model.toJSON().has("created_at"));
                 Assertions.assertTrue(model.getCreatedBy().startsWith("blt"));
-                assertEquals("gregory", model.getUpdateAt().getCalendarType());
+                Assertions.assertEquals("gregory", model.getUpdateAt().getCalendarType());
                 Assertions.assertTrue(model.getUpdatedBy().startsWith("blt"));
-                assertEquals("", model.getDeletedBy());
+                Assertions.assertEquals("", model.getDeletedBy());
                 logger.info("passed...");
             }
         });
@@ -107,4 +106,60 @@ public void onCompletion(ResponseType responseType, List<Asset> assets, Error er
         }
     });
     }
+
+    @Test
+    void testFetchFirst10Assets() throws IllegalAccessException {
+        AssetLibrary assetLibrary = stack.assetLibrary();
+        assetLibrary.skip(0).limit(10).fetchAll(new FetchAssetsCallback() {
+            @Override
+            public void onCompletion(ResponseType responseType, List<Asset> assets, Error error) {
+                Assertions.assertNotNull(assets, "Assets list should not be null");
+                Assertions.assertTrue(assets.size() <= 10, "Assets fetched should not exceed the limit");
+            }
+        });
+    }
+
+    @Test
+    void testFetchAssetsWithSkip() throws IllegalAccessException {
+        AssetLibrary assetLibrary = stack.assetLibrary();
+        assetLibrary.skip(10).limit(10).fetchAll(new FetchAssetsCallback() {
+            @Override
+            public void onCompletion(ResponseType responseType, List<Asset> assets, Error error) {
+                Assertions.assertNotNull(assets, "Assets list should not be null");
+                Assertions.assertTrue(assets.size() <= 10, "Assets fetched should not exceed the limit");
+            }
+        });
+    }
+
+    @Test
+    void testFetchBeyondAvailableAssets() throws IllegalAccessException {
+        AssetLibrary assetLibrary = stack.assetLibrary();
+        assetLibrary.skip(5000).limit(10).fetchAll(new FetchAssetsCallback() {
+            @Override
+            public void onCompletion(ResponseType responseType, List<Asset> assets, Error error) {
+                Assertions.assertNotNull(assets, "Assets list should not be null");
+                Assertions.assertEquals(0, assets.size(), "No assets should be fetched when skip exceeds available assets");
+            }
+        });
+    }
+
+    @Test
+    void testFetchAllAssetsInBatches() throws IllegalAccessException {
+        AssetLibrary assetLibrary = stack.assetLibrary();
+        int limit = 50;
+        int totalAssetsFetched[] = {0};
+
+        for (int skip = 0; skip < 150; skip += limit) {
+            assetLibrary.skip(skip).limit(limit).fetchAll(new FetchAssetsCallback() {
+                @Override
+                public void onCompletion(ResponseType responseType, List<Asset> assets, Error error) {
+                    totalAssetsFetched[0] += assets.size();
+                    Assertions.assertNotNull(assets, "Assets list should not be null");
+                    Assertions.assertTrue(assets.size() <= limit, "Assets fetched should not exceed the limit");
+                    Assertions.assertEquals(6, totalAssetsFetched[0]);
+                }
+            });
+        }
+    }
+
 }