Inheritance Use Data

This page contains various information regarding the paper:

Ewan Tempero, Hong Yul Yang, James Noble ' What Programmers Do with Inheritance in Java (preprint) Accepted for ECOOP 2013

Status: "Candidate Draft" (content 100% - everything planned to be here is here, quality 85% - some wording needs improving, some organisational work needed, some QA work to be done, but the data itself is in good shape).

Data

The data is available as a gzipped tar file (5178290 bytes). It consists of:

inheritance-use-data.csv: The data used to create the charts showing results for all systems in the paper, as a tab-separated file (see file for legend and provenance details).
ant-data.csv: The data used to create the charts showing the longitudinal results for ant in the paper, as a tab-separated file (see file for legend and provenance details).
freecol-data.csv: The data used to create the charts showing the longitudinal results for freecol in the paper, as a tab-separated file (see file for legend and provenance details).
systems-data.csv: Some summary data of the systems in the study (a subset of what is available from the Qualitas Corpus website).
inheritance-graphs: Directory containing the inheritance graph models (described below) of the systems in the study described in the paper. The 93 systems are at the top level, and the releases of ant and freecol are in subdirectories. All data is provided as a tab-separated file (see file for legend and provenance details).

Inheritance Graph Models

Description of the model — gives the general description of what the data in the inheritance graph models means.
Specific details of attributes and metrics — gives the specific details of the attributes of edges and, based on the attributes, the formal definitions of the metrics. Note that the metrics used in the paper do not use all of the attributes described. Also, the terminology of the metrics is sometimes different to what is used in the paper. Specificially:

Edges used

All edges considered by the metrics used in the paper have the UserDefined and Explicit attributes.

Subtype use

Edges with the DirectSubtype or IndirectSubtype attributes.

External reuse

Edges with the DirectExReuseField, IndirectExReuseField, DirectExReuseMethod, or IndirectExReuseMethod attributes.

Internal reuse

Edges with the UpcallField or UpcallMethod attributes.