Rewrite @FromJson/@ToJson example.
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README.md
30
README.md
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@ -132,6 +132,8 @@ Voila:
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}
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```
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#### Another example
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Note that the method annotated with `@FromJson` does not need to take a String as an argument. Rather it can take
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input of any type and Moshi will first parse the JSON to an object of that type and then use the `@FromJson`
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method to produce the desired final value. Conversely, the method annotated with `@ToJson` does not have to produce
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@ -149,9 +151,18 @@ separate strings.
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```
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We would like to combine these two fields into one string to facilitate the date parsing at a
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later point. That is, while the `EventJson` class corresponds to the JSON structure directly, we would rather
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have an `Event` that looks like below (while we are at it, we are also changing the variable names to
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CamelCase).
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later point. Also, we would like to have all variable names in CamelCase. Therefore, the `Event` class we
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want Moshi to produce like this:
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```java
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class Event {
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String title;
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String beginDateAndTime;
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}
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```
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Instead of manually parsing the JSON line per line (which we could also do) we can have Moshi
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do the transformation automatically. We simply define another class `EventJson` that directly corresponds to the JSON structure:
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```java
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class EventJson {
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@ -159,16 +170,11 @@ class EventJson {
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String begin_date;
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String begin_time;
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}
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class Event {
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String title;
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String beginDateAndTime;
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}
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```
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To enable Moshi to do that transformation automatically we define a class with the `@FromJson`
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(and `@ToJson`) methods:
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And another class with the appropriate `@FromJson` and `@ToJson` methods that are telling Moshi how to convert
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an `EventJson` to an `Event` and back. Now, whenever we are asking Moshi to parse a JSON to an `Event` it will first parse it to an `EventJson` as an intermediate step. Conversely, to serialize an `Event` Moshi will first
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create an `EventJson` object and then serialize that object as usual.
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```java
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class EventJsonAdapter {
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@ -193,7 +199,7 @@ class EventJsonAdapter {
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}
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```
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And register it with Moshi.
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Again we register the adapter with Moshi.
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```java
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Moshi moshi = new Moshi.Builder()
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