Add example for custom JsonAdapter.

2025-10-18 23:49:21 +08:00 · 2015-10-06 17:06:05 +02:00
parent 6ed45f0bb2
commit 68f2fb1d74
2 changed files with 172 additions and 0 deletions
--- a/examples/src/main/java/com/squareup/moshi/recipes/FromJsonWithoutStrings.java
+++ b/examples/src/main/java/com/squareup/moshi/recipes/FromJsonWithoutStrings.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2015 Square, Inc.
+ *
+ * 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.
+ */
+package com.squareup.moshi.recipes;
+
+import com.squareup.moshi.FromJson;
+import com.squareup.moshi.JsonAdapter;
+import com.squareup.moshi.Moshi;
+import com.squareup.moshi.ToJson;
+
+public final class FromJsonWithoutStrings {
+
+    public void run() throws Exception {
+        // for some reason our JSON has date and time as separate fields -
+        // we will clean that up during parsing: Moshi will first parse
+        // the JSON directly to an EventJson and from that the EventJsonAdapter
+        // will create the actual Event
+        String json = ""
+                + "{\n"
+                + "  \"title\": \"Blackjack tournament\",\n"
+                + "  \"begin_date\": \"20151010\",\n"
+                + "  \"begin_time\": \"17:04\"\n"
+                + "}\n";
+
+        Moshi moshi = new Moshi.Builder()
+                .add(new EventJsonAdapter())
+                .build();
+        JsonAdapter<Event> jsonAdapter = moshi.adapter(Event.class);
+
+        Event event = jsonAdapter.fromJson(json);
+        System.out.println(event);
+        System.out.println(jsonAdapter.toJson(event));
+    }
+
+    public static void main(String[] args) throws Exception {
+        new FromJsonWithoutStrings().run();
+    }
+
+    private static final class EventJson {
+        String title;
+        String begin_date;
+        String begin_time;
+    }
+
+    public static final class Event {
+        String title;
+        String beginDateAndTime;
+
+        @Override
+        public String toString() {
+            return "Event{" +
+                    "title='" + title + '\'' +
+                    ", beginDateAndTime='" + beginDateAndTime + '\'' +
+                    '}';
+        }
+    }
+
+    private static final class EventJsonAdapter {
+
+        @FromJson
+        Event eventFromJson(EventJson eventJson) {
+            Event event = new Event();
+            event.title = eventJson.title;
+            event.beginDateAndTime = eventJson.begin_date + " " + eventJson.begin_time;
+            return event;
+        }
+
+        @ToJson
+        EventJson eventToJson(Event event) {
+            EventJson json = new EventJson();
+            json.title = event.title;
+            json.begin_date = event.beginDateAndTime.substring(0, 8);
+            json.begin_time = event.beginDateAndTime.substring(9, 14);
+            return json;
+        }
+
+    }
+}