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> When passing a mutable instance into a method which makes a deep copy of the
> instance, it results in discrepancies between the forked instances. It is
> prone to errors if one expects the state change on the original instance to be
> reflected on the method with its forked instance.
```java
Location location = new Location("gps");
Bundle bundle = new Bundle();
bundle.putFloat("someFloat", 12.3f);
location.setExtras(bundle);
// Now add more things to the bundle, but it won't modify the internal
// representation stored by Location.
bundle.putInt("someInt", 7);
```
```java
private static Bundle getLocationExtras(Location location) {
Bundle bundle = location.getExtras();
if (bundle != null) {
return bundle;
}
bundle = new Bundle();
location.setExtras(bundle);
// Now leaks the bundle which is subject to modification in its
// method of invocation.
return bundle;
}
```
|
