JarCastinggson-deep-merge
gson-deep-merge is a library that allows deep merging of objects with Gson.
Usage
Include this in your POM:
<dependency>
<groupId>com.github.brymck</groupId>
<artifactId>gson-deep-merge</artifactId>
<version>0.9.0</version>
</dependency>
And use it as so, given two instances original and update of class Example:
Gson gson = new Gson();
GsonDeepMerge gsonDeepMerge = new GsonDeepMerge();
Example merged = gsonDeepMerge.deepMerge(gson, original, update, Example.class);
One obvious use case for tools like Kotlin is to embed this in an extension function. For instance, given the above Example class:
// Extension implementation
private val gson = Gson()
private val gsonDeepMerge = GsonDeepMerge()
fun Example.deepMerge(other: Example): Example =
gsonDeepMerge.deepMerge(gson, this, other, this::class.java)
// Usage
val foo = Example(foo = Foo())
val bar = Example(bar = Bar())
val fooBar = foo.deepMerge(bar);