synchronized (taskClassDefinitions) { synchronized (antTypeTable) { if (rebuildTaskClassDefinitions) { taskClassDefinitions.clear(); for (Iterator i = antTypeTable.keySet().iterator(); i.hasNext();) { String name = (String) i.next(); Class clazz = antTypeTable.getExposedClass(name); if (clazz == null) { continue; } if (Task.class.isAssignableFrom(clazz)) { taskClassDefinitions.put( name, antTypeTable.getTypeClass(name)); } } rebuildTaskClassDefinitions = false; } } }
synchronized (antTypeTable) { if (rebuildTypeClassDefinitions) { typeClassDefinitions.clear(); for (Iterator i = antTypeTable.keySet().iterator(); i.hasNext();) { String name = (String) i.next(); Class clazz = antTypeTable.getExposedClass(name); if (clazz == null) { continue; } if (!(Task.class.isAssignableFrom(clazz))) { typeClassDefinitions.put( name, antTypeTable.getTypeClass(name)); } } rebuildTypeClassDefinitions = false; } }
Clone fragments detected by clone detection tool
File path: /apache-ant-1.7.0/src/org/apache/tools/ant/ComponentHelper.java File path: /apache-ant-1.7.0/src/org/apache/tools/ant/ComponentHelper.java
Method name: Hashtable getTaskDefinitions() Method name: Hashtable getDataTypeDefinitions()
Number of AST nodes: 12 Number of AST nodes: 11
1
synchronized (taskClassDefinitions) {
2
            synchronized (antTypeTable) {
1
synchronized (antTypeTable) {
3
                if (rebuildTaskClassDefinitions) {
2
                if (rebuildTypeClassDefinitions) {
4
                    taskClassDefinitions.clear();
3
                    typeClassDefinitions.clear();
5
                    for (Iterator i = antTypeTable.keySet().iterator();
4
                    for (Iterator i = antTypeTable.keySet().iterator();
6
                         i.hasNext();) {
5
                         i.hasNext();) {
7
                        String name = (String) i.next();
6
                        String name = (String) i.next();
8
                        Class clazz = antTypeTable.getExposedClass(name);
7
                        Class clazz = antTypeTable.getExposedClass(name);
9
                        if (clazz == null) {
8
                        if (clazz == null) {
10
                            continue;
9
                            continue;
11
                        }
10
                        }
12
                        if (Task.class.isAssignableFrom(clazz)) {
11
                        if (!(Task.class.isAssignableFrom(clazz))) {
13
                            taskClassDefinitions.put(
12
                            typeClassDefinitions.put(
14
                                name, antTypeTable.getTypeClass(name));
13
                                name, antTypeTable.getTypeClass(name));
15
                        }
14
                        }
16
                    }
15
                    }
17
                    rebuildTaskClassDefinitions = false;
16
                    rebuildTypeClassDefinitions = false;
18
                }
17
                }
19
            }
18
            }
20
        }
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)0.5
Clones locationClones are declared in the same class
Number of node comparisons33
  1. {Non-refactorable}
    Mapping Summary
    Number of mapped statements11
    Number of unmapped statements in the first code fragment0
    Number of unmapped statements in the second code fragment0
    Time elapsed for statement mapping (ms)7.0
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    2
    synchronized (antTypeTable)
    2
    synchronized (antTypeTable)
    3
    if (rebuildTaskClassDefinitions)
    3
    if (rebuildTaskClassDefinitions)
    3
    if (rebuildTypeClassDefinitions)
    Differences
    Expression1Expression2Difference
    rebuildTaskClassDefinitionsrebuildTypeClassDefinitionsVARIABLE_NAME_MISMATCH
    3
    if (rebuildTypeClassDefinitions)
    4
    taskClassDefinitions.clear();
    4
    taskClassDefinitions.clear();
    4
    typeClassDefinitions.clear();
    Differences
    Expression1Expression2Difference
    taskClassDefinitionstypeClassDefinitionsVARIABLE_NAME_MISMATCH
    4
    typeClassDefinitions.clear();
    5
    for (Iterator i = antTypeTable.keySet().iterator(); i.hasNext(); )
    5
    for (Iterator i = antTypeTable.keySet().iterator(); i.hasNext(); )
    6
    String name = (String)i.next();
    6
    String name = (String)i.next();
    7
    Class clazz = antTypeTable.getExposedClass(name);
    7
    Class clazz = antTypeTable.getExposedClass(name);
    8
    if (clazz == null)
    8
    if (clazz == null)
    9
    continue;
    9
    continue;
    10
    if (Task.class.isAssignableFrom(clazz))
    10
    if (Task.class.isAssignableFrom(clazz))
    10
    if (!(Task.class.isAssignableFrom(clazz)))
    Differences
    Expression1Expression2Difference
    Task.class.isAssignableFrom(clazz)!(Task.class.isAssignableFrom(clazz))TYPE_COMPATIBLE_REPLACEMENT
    Preondition Violations
    Expression Task.class.isAssignableFrom(clazz) cannot be parameterized, because it has dependencies to/from statements that will be extracted
    Expression !(Task.class.isAssignableFrom(clazz)) cannot be parameterized, because it has dependencies to/from statements that will be extracted
    10
    if (!(Task.class.isAssignableFrom(clazz)))
    11
    taskClassDefinitions.put(name, antTypeTable.getTypeClass(name));
    11
    taskClassDefinitions.put(name, antTypeTable.getTypeClass(name));
    11
    typeClassDefinitions.put(name, antTypeTable.getTypeClass(name));
    Differences
    Expression1Expression2Difference
    taskClassDefinitionstypeClassDefinitionsVARIABLE_NAME_MISMATCH
    11
    typeClassDefinitions.put(name, antTypeTable.getTypeClass(name));
    12
    rebuildTaskClassDefinitions = false;
    12
    rebuildTaskClassDefinitions = false;
    12
    rebuildTypeClassDefinitions = false;
    Differences
    Expression1Expression2Difference
    rebuildTaskClassDefinitionsrebuildTypeClassDefinitionsVARIABLE_NAME_MISMATCH
    Preondition Violations
    Expression rebuildTaskClassDefinitions is a field being modified, and thus it cannot be parameterized
    Expression rebuildTypeClassDefinitions is a field being modified, and thus it cannot be parameterized
    12
    rebuildTypeClassDefinitions = false;
    Precondition Violations (4)
    Row Violation
    1Expression Task.class.isAssignableFrom(clazz) cannot be parameterized, because it has dependencies to/from statements that will be extracted
    2Expression !(Task.class.isAssignableFrom(clazz)) cannot be parameterized, because it has dependencies to/from statements that will be extracted
    3Expression rebuildTaskClassDefinitions is a field being modified, and thus it cannot be parameterized
    4Expression rebuildTypeClassDefinitions is a field being modified, and thus it cannot be parameterized