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Chapter D. Metric Extraction Illustration
1 /∗∗ Total counts for a subset of metrics are included in the header
2 ∗ LIC (Load Count) = 15, SIC ( Store Count) = 2, NOM (Number of Methods) = 2
3 ∗ NOB (Number of Branches ) = 6, TCC (Type Construction Count) = 1
4 ∗ MCC (Method Call Count) = 3, THC (Throw Count) = 1, EXC ( Exception Count) = 1
5 ∗ ODC (Out Degree Count) = 4 ( String , Exception , PrintStream , System. out )
6 ∗ NOF (Number of Fields ) = 3, IOC ( Increment Operation Count) = 3
7 ∗ LVC ( Local Variable Count) = 3
8 ∗/
9 public class MetricCountExample
10 {
11 private boolean bField ; // un−initialised field
12
13 // 2 LOADS: this , constant integer
14 private int index = 5; // 1 STORE
15
16 // 2 LOADS: this , constant string
17 private String str = " Hello World ! " ; // 1 STORE
18
19 // Default Constructor
20 // 1 LOAD ( this ) , 1 METHOD CALL ( constructor of super class java . lang . Object )
21
22 public void methodX ( String msg ) throws Exception
23 {
24 int a = 5; // 1 LOAD constant of 5, 1 STORE into local variable a
25 methodY ( ) ; // 1 INTERNAL method call , 1 LOAD: this object
26
27 // BRANCH count = 2, one for the i f and another for &&
28 // 4 LOADS: a , this , index , and bField
29 i f ( ( a > index ) && ( bField == f a l s e ) ) return ;
30
31 // BRANCH count = 2, default is not counted , 1 per each case
32 switch ( index ) // 2 LOADS: this , index
33 {
34 case 0: a++; // INCREMENT operation
35 case 1: a−−; // INCREMENT operation with −1
36 default : a−−; // INCREMENT operation with −1
37 }
38
39 // BRANCH COUNT = 1, TYPE Construction Count = 1 (new Exception )
40 // THROW Count = 1, 2 LOADS: args array , constant value 3
41 i f ( msg == null ) throw new Exception ( " Something odd" ) ;
42 }
43
44 public void methodY ( )
45 {
46 // 2 LOAD constants , 1 STORE, 1 INCREMENT OPERATION, 1 BRANCH ( for loop condition
)
47 for ( int j=0; j