# Use Optional::map
# Properties
| Property | Value |
|---|---|
| Rule ID | OptionalMap |
| First seen in jSparrow version | 3.13.0 |
| Minimum Java version | 8 |
| Remediation cost | 2 min |
# Description
Extracts an Optional::map from the consumer used in Optional::ifPresent.
This makes complicated code blocks easier to read and reuse.
# Benefits
Arguably, the lambda expression is easier to read and can be combined with other Optional operations.
# Code Changes
# Base Case
Pre
findById(userId)
.ifPresent(user -> {
String email = user.getMail();
sendMail(email);
});
Post
findById(userId)
.map(user -> user.getMail())
.ifPresent(email -> sendMail(email));
# Multiple Statements in Lambda Body
Pre
Optional<User> oUser = findById(userId);
oUser.ifPresent(user -> {
Address address = user.getAddress();
sendGiftCard(address);
sendAds(address);
});
Post
Optional<User> oUser = findById(userId);
oUser.map(user -> user.getAddress()).ifPresent(address -> {
sendGiftCard(address);
sendAds(address);
});
Automatic Application of This Rule
The automatic application of this rule is supported in the following jSparrow version:
# Tags
1
You & jSparrow
