Collapse If Statements
Properties
| Property | Value |
|---|---|
| First seen in jSparrow version | 3.2.0 |
| Minimum Java version | 1.1 |
| Remediation cost | 5 min |
| Links | S1066 |
Description
Collapses, when possible, the nested if-statements into a single one by concatenating their conditions with the infix operator &&.
If the concatenation results to an infix expression with more than two components, then a new local variable is introduced to store the condition.
Benefits
Improves the readability by reducing the number of the nested language constructs.
Requirement & Tags
Requirements
None
Code Changes
Simple collapse
Pre
if (a) {
if (b) {
System.out.println("Ok");
}
}
Post
if (a && b) {
System.out.println("Ok");
}
Collapsing more than two statements
Pre
if (a) {
if (b) {
if (c) {
System.out.println("Ok");
}
}
}
Post
boolean condition = a && b && c;
if (condition) {
System.out.println("Ok");
}
Compound conditions
Pre
if (a) {
if (b || c) {
System.out.println("Ok");
}
}
Post
boolean condition = a && (b || c);
if (condition) {
System.out.println("Ok");
}
Automatic Application of This Rule
The automatic application of this rule is supported in the following jSparrow version: