if (rc == null) { return; } resources = (resources == null) ? new FileUnion() : resources; resources.add(rc);
if (rc == null) { return; } rcs = (rcs == null) ? new Resources() : rcs; rcs.add(rc);
Clone fragments detected by clone detection tool
File path: /apache-ant-1.7.0/src/org/apache/tools/ant/taskdefs/Checksum.java File path: /apache-ant-1.7.0/src/org/apache/tools/ant/taskdefs/Delete.java
Method name: void add(ResourceCollection) Method name: void add(ResourceCollection)
Number of AST nodes: 4 Number of AST nodes: 4
1
if (rc == null) {
1
if (rc == null) {
2
            return;
2
            return;
3
        }
3
        }
4
        resources = (resources == null) ? new FileUnion() : resources;
4
        rcs = (rcs == null) ? new Resources() : rcs;
5
        resources.add(rc);
5
        rcs.add(rc);
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 having the same super class
Number of node comparisons6
  1. {Non-refactorable}
    Mapping Summary
    Number of mapped statements4
    Number of unmapped statements in the first code fragment0
    Number of unmapped statements in the second code fragment0
    Time elapsed for statement mapping (ms)0.9
    Clone typeType 2
    Mapped Statements
    ID Statement ID Statement
    1
    if (rc == null)
    1
    if (rc == null)
    2
    return;
    2
    return;
    3
    resources = (resources == null) ? new FileUnion() : resources;
    3
    resources = (resources == null) ? new FileUnion() : resources;
    3
    rcs = (rcs == null) ? new Resources() : rcs;
    Differences
    Expression1Expression2Difference
    resourcesrcsVARIABLE_NAME_MISMATCH
    org.apache.tools.ant.taskdefs.Checksum.FileUnionorg.apache.tools.ant.types.resources.ResourcesSUBCLASS_TYPE_MISMATCH
    resourcesrcsVARIABLE_NAME_MISMATCH
    org.apache.tools.ant.taskdefs.Checksum.FileUnionorg.apache.tools.ant.types.resources.ResourcesSUBCLASS_TYPE_MISMATCH
    org.apache.tools.ant.taskdefs.Checksum.FileUnionorg.apache.tools.ant.types.resources.ResourcesSUBCLASS_TYPE_MISMATCH
    resourcesrcsVARIABLE_NAME_MISMATCH
    org.apache.tools.ant.taskdefs.Checksum.FileUnionorg.apache.tools.ant.types.resources.ResourcesSUBCLASS_TYPE_MISMATCH
    Preondition Violations
    Expression resources is a field being modified, and thus it cannot be parameterized
    Expression rcs is a field being modified, and thus it cannot be parameterized
    3
    rcs = (rcs == null) ? new Resources() : rcs;
    4
    resources.add(rc);
    4
    resources.add(rc);
    4
    rcs.add(rc);
    Differences
    Expression1Expression2Difference
    resourcesrcsVARIABLE_NAME_MISMATCH
    org.apache.tools.ant.taskdefs.Checksum.FileUnionorg.apache.tools.ant.types.resources.ResourcesSUBCLASS_TYPE_MISMATCH
    Preondition Violations
    Expression resources cannot be parameterized, because it has dependencies to/from statements that will be extracted
    Expression rcs cannot be parameterized, because it has dependencies to/from statements that will be extracted
    Expression resources cannot be unified with expression rcs , because common superclass org.apache.tools.ant.types.DataType does not declare member(s) public void add(org.apache.tools.ant.types.ResourceCollection)
    4
    rcs.add(rc);
    Precondition Violations (5)
    Row Violation
    1Expression resources is a field being modified, and thus it cannot be parameterized
    2Expression rcs is a field being modified, and thus it cannot be parameterized
    3Expression resources cannot be parameterized, because it has dependencies to/from statements that will be extracted
    4Expression rcs cannot be parameterized, because it has dependencies to/from statements that will be extracted
    5Expression resources cannot be unified with expression rcs , because common superclass org.apache.tools.ant.types.DataType does not declare member(s) public void add(org.apache.tools.ant.types.ResourceCollection)