158-4-212

try { JUnitTest t = (JUnitTest) super.clone(); t.props = props == null ? null : (Properties) props.clone(); t.formatters = (Vector) formatters.clone(); return t; } catch (CloneNotSupportedException e) { // plain impossible return this; }
try { return (Node) elementAt(i); } catch (ArrayIndexOutOfBoundsException e) { return null; // conforming to NodeList interface }

Clone fragments detected by clone detection tool
File path: /apache-ant-1.7.0/src/org/apache/tools/ant/taskdefs/optional/junit/JUnitTest.java |  | File path: /apache-ant-1.7.0/src/org/apache/tools/ant/taskdefs/optional/junit/DOMUtil.java
Method name: `Object clone()` |  | Method name: `Node item(int)`
Number of AST nodes: 5 |  | Number of AST nodes: 2

1

    try {↵

1

    try {↵

2

                JUnitTest t = (JUnitTest) super.clone();↵

2

                ↵

3

                t.props = props == null ? null : (Properties) props.clone();↵

4

                t.formatters = (Vector) formatters.clone();↵

5

                return t;↵

6

            } catch (CloneNotSupportedException e) {↵

7

                // plain impossible↵

8

                return this;↵

3

        return (Node) elementAt(i);↵

4

                } catch (ArrayIndexOutOfBoundsException e) {↵

5

                    return null; // conforming to NodeList interface↵

9

            }

6

                }

See real code fragment |  | See real code fragment

Summary
Number of common nesting structure subtrees | 1
Number of refactorable cases | 0
Number of non-refactorable cases | 1
Time elapsed for finding largest common nesting structure subtrees (ms) | 0.2
Clones location | Clones are in different classes
Number of node comparisons | 10

1. {Non-refactorable}

   Mapping Summary
   Number of mapped statements | 1
   Number of unmapped statements in the first code fragment | 4
   Number of unmapped statements in the second code fragment | 1
   Time elapsed for statement mapping (ms) | 0.6
   Clone type | Type 3

   Mapped Statements
   ID | Statement |  | ID | Statement
   --- | --- | --- | --- | ---

   1

       try

   1 | try
   1 | try

   Differences
   Expression1 | Expression2 | Difference
   --- | --- | ---
   java.lang.CloneNotSupportedException | java.lang.ArrayIndexOutOfBoundsException | SUBCLASS_TYPE_MISMATCH
   java.lang.CloneNotSupportedException | java.lang.ArrayIndexOutOfBoundsException | SUBCLASS_TYPE_MISMATCH
   this | null | TYPE_COMPATIBLE_REPLACEMENT

   1

       try

   2 | return (Node)elementAt(i);

   Preondition Violations
   Unmatched return (Node)elementAt(i);

   2

       return (Node)elementAt(i);

   2

       JUnitTest t = (JUnitTest)super.clone();

   2 | JUnitTest t = (JUnitTest)super.clone();

   Preondition Violations
   Unmatched statement JUnitTest t=(JUnitTest)super.clone(); cannot be moved before or after the extracted code, because it throws exception(s) that should be caught by a try block that will be extracted

   3

       t.props = props == null ? null : (Properties)props.clone();

   4

       t.formatters = (Vector)formatters.clone();

   5

       return t;

   5 | return t;

   Preondition Violations
   Unmatched return t;

   Precondition Violations (3)
   Row | Violation
   --- | ---
   1 | Unmatched return (Node)elementAt(i);
   2 | Unmatched statement JUnitTest t=(JUnitTest)super.clone(); cannot be moved before or after the extracted code, because it throws exception(s) that should be caught by a try block that will be extracted
   3 | Unmatched return t;