if (children == null) { children = new ArrayList(); } children.add(child);
if (dependencies == null) { dependencies = new ArrayList(2); } dependencies.add(dependency);
Clone fragments detected by clone detection tool
File path: /apache-ant-1.7.0/src/org/apache/tools/ant/UnknownElement.java File path: /apache-ant-1.7.0/src/org/apache/tools/ant/Target.java
Method name: void addChild(UnknownElement) Method name: void addDependency(String)
Number of AST nodes: 3 Number of AST nodes: 3
1
if (children == null) {
1
if (dependencies == null) {
2
            children = new ArrayList();
2
            dependencies = new ArrayList(2);
3
        }
3
        }
4
        children.add(child);
4
        dependencies.add(dependency);
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)0.1
Clones locationClones are in different classes
Number of node comparisons5
  1. {Non-refactorable}
    Mapping Summary
    Number of mapped statements3
    Number of unmapped statements in the first code fragment0
    Number of unmapped statements in the second code fragment0
    Time elapsed for statement mapping (ms)0.6
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (children == null)
    1
    if (children == null)
    1
    if (dependencies == null)
    Differences
    Expression1Expression2Difference
    childrendependenciesVARIABLE_NAME_MISMATCH
    1
    if (dependencies == null)
    2
    children = new ArrayList();
    2
    children = new ArrayList();
    2
    dependencies = new ArrayList(2);
    Differences
    Expression1Expression2Difference
    childrendependenciesVARIABLE_NAME_MISMATCH
    new ArrayList()new ArrayList(2)ARGUMENT_NUMBER_MISMATCH
    Preondition Violations
    Expression children is a field being modified, and thus it cannot be parameterized
    Expression dependencies is a field being modified, and thus it cannot be parameterized
    2
    dependencies = new ArrayList(2);
    3
    children.add(child);
    3
    children.add(child);
    3
    dependencies.add(dependency);
    Differences
    Expression1Expression2Difference
    childdependencyVARIABLE_NAME_MISMATCH
    org.apache.tools.ant.UnknownElementjava.lang.StringVARIABLE_TYPE_MISMATCH
    childrendependenciesVARIABLE_NAME_MISMATCH
    Preondition Violations
    Type org.apache.tools.ant.UnknownElement of variable child does not match with type java.lang.String of variable dependency
    • Make classes org.apache.tools.ant.UnknownElement and java.lang.String extend a common superclass
    Expression children cannot be parameterized, because it has dependencies to/from statements that will be extracted
    Expression dependencies cannot be parameterized, because it has dependencies to/from statements that will be extracted
    3
    dependencies.add(dependency);
    Precondition Violations (5)
    Row Violation
    1Expression children is a field being modified, and thus it cannot be parameterized
    2Expression dependencies is a field being modified, and thus it cannot be parameterized
    3Type org.apache.tools.ant.UnknownElement of variable child does not match with type java.lang.String of variable dependency
    4Expression children cannot be parameterized, because it has dependencies to/from statements that will be extracted
    5Expression dependencies cannot be parameterized, because it has dependencies to/from statements that will be extracted