if (instance == null) { try { instance = new Config(); } catch (Exception e) { e.printStackTrace(); } }
try { cache.persist(); } catch (IOException e) { cache.clear(); }
Clone fragments detected by clone detection tool
File path: /columba-1.4-src/calendar/src/main/java/org/columba/calendar/config/Config.java File path: /columba-1.4-src/mail/src/main/java/org/columba/mail/folder/imap/IMAPCache.java
Method name: IConfig getInstance() Method name: void run()
Number of AST nodes: 3 Number of AST nodes: 2
1
if (instance == null) {
2
			try {
3
				instance = new Config
1
try {
4
();
2
			cache.persist();
5
			} catch (Exception e) {
3
		} catch (IOException e) {
6
				e.printStackTrace();
4
			
7
			}
5
cache.clear();
8
		}
6
		}
Summary
Number of common nesting structure subtrees1
Number of refactorable cases0
Number of non-refactorable cases1
Time elapsed for finding largest common nesting structure subtrees (ms)0.3
Clones locationClones are in different classes
Number of node comparisons4
  1. {Non-refactorable}
    Mapping Summary
    Number of mapped statements1
    Number of unmapped statements in the first code fragment1
    Number of unmapped statements in the second code fragment1
    Time elapsed for statement mapping (ms)7.3
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    2
    try
    2
    try
    1
    try
    Differences
    Expression1Expression2Difference
    java.lang.Exceptionjava.io.IOExceptionSUBCLASS_TYPE_MISMATCH
    java.lang.Exceptionjava.io.IOExceptionSUBCLASS_TYPE_MISMATCH
    printStackTraceclearMETHOD_INVOCATION_NAME_MISMATCH
    ecacheVARIABLE_NAME_MISMATCH
    java.lang.Exceptionorg.columba.core.io.StreamCacheVARIABLE_TYPE_MISMATCH
    Preondition Violations
    Expression e.printStackTrace() cannot be parameterized, because it has dependencies to/from statements that will be extracted
    Expression e.printStackTrace() is a void method call, and thus it cannot be parameterized
    Expression cache.clear() is a void method call, and thus it cannot be parameterized
    Expression e cannot be parameterized, because it has dependencies to/from statements that will be extracted
    Type java.lang.Exception of variable e does not match with type org.columba.core.io.StreamCache of variable cache
    • Make classes java.lang.Exception and org.columba.core.io.StreamCache extend a common superclass
    1
    try
                                          
    2
    cache.persist();
    Preondition Violations
    Unmatched statement cache.persist(); 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
    2
    cache.persist();
    3
    instance = new Config();
    3
    instance = new Config();
    Preondition Violations
    Unmatched statement instance=new Config(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    Unmatched statement instance=new Config(); 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
                                                      
    Precondition Violations (9)
    Row Violation
    1Expression e.printStackTrace() cannot be parameterized, because it has dependencies to/from statements that will be extracted
    2Expression e.printStackTrace() is a void method call, and thus it cannot be parameterized
    3Expression cache.clear() is a void method call, and thus it cannot be parameterized
    4Expression e cannot be parameterized, because it has dependencies to/from statements that will be extracted
    5Type java.lang.Exception of variable e does not match with type org.columba.core.io.StreamCache of variable cache
    6Unmatched statement cache.persist(); 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
    7Unmatched statement instance=new Config(); cannot be moved before the extracted code, because it has control dependencies from statements that will be extracted
    8Unmatched statement instance=new Config(); 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
    9The refactoring of the clones is infeasible, because classes org.columba.calendar.config.Config and org.columba.mail.folder.imap.IMAPCache do not have a common superclass