Fix BoxWeblink deserialization

CHANGELOG.md

@@ -6,6 +6,10 @@ __New Features and Enhancements:__
 
 - Add file request support ([#869](https://github.com/box/box-java-sdk/pull/869))
 
+__Bug Fixes:__
+
+- Fix `BoxWeblink` deserialization ([#881](https://github.com/box/box-java-sdk/pull/881))
+
 ## 2.53.0 [2021-01-08]
 
 __New Features and Enhancements:__

src/main/java/com/box/sdk/BoxWebLink.java

@@ -275,7 +275,11 @@ protected void parseJSONMember(JsonObject.Member member) {
             try {
                 if (memberName.equals("url")) {
                     try {
-                        this.linkURL = new URL(value.asString());
+                        if (value.asString().isEmpty()) {
+                            this.linkURL = null;
+                        } else {
+                            this.linkURL = new URL(value.asString());
+                        }
                     } catch (MalformedURLException e) {
                         throw new BoxAPIException("Couldn't parse url for weblink", e);
                     }

src/test/Fixtures/BoxCollection/GetCollectionItems200.json

@@ -13,6 +13,14 @@
             "etag": "1",
             "sha1": "9f425a006e19bb38566af5b2122abd2e0c5dd851",
             "name": "Simple Contract Final.pdf"
+        },
+        {
+            "type": "web_link",
+            "id": "123456",
+            "sequence_id": "0",
+            "etag": "0",
+            "name": "google.com",
+            "url": ""
         }
     ],
     "limit": 100,

src/test/java/com/box/sdk/BoxCollectionTest.java

@@ -148,8 +148,10 @@ public void getCollectionSucceeds() throws IOException {
     public void testGetItemsParsesFieldsCorrectly() throws IOException {
         String result = "";
         final String collectionID = "12345";
+        final String collectionID2 = "123456";
         final String collectionItemsURL = "/collections/12345/items/";
         final String collectionName = "Simple Contract Final.pdf";
+        final String collectionName2 = "google.com";
 
         result = TestConfig.getFixture("BoxCollection/GetCollectionItems200");
 
@@ -160,9 +162,13 @@ public void testGetItemsParsesFieldsCorrectly() throws IOException {
 
         BoxCollection collection = new BoxCollection(this.api, collectionID);
         Iterator<BoxItem.Info> iterator = collection.getItems().iterator();
-        BoxItem.Info info = iterator.next();
+        BoxFile.Info info = (BoxFile.Info) iterator.next();
+        BoxWebLink.Info info2 = (BoxWebLink.Info) iterator.next();
 
         Assert.assertEquals(collectionID, info.getID());
         Assert.assertEquals(collectionName, info.getName());
+        Assert.assertEquals(collectionID2, info2.getID());
+        Assert.assertEquals(collectionName2, info2.getName());
+        Assert.assertEquals(null, info2.getLinkURL());
     }
 }