public void execute()

in src/main/org/apache/tools/ant/taskdefs/SubAnt.java [188:274]
78 lines of code
24 McCabe index (conditional complexity)

    public void execute() {
        if (buildpath == null) {
            throw new BuildException("No buildpath specified");
        }

        final String[] filenames = buildpath.list();
        final int count = filenames.length;
        if (count < 1) {
            log("No sub-builds to iterate on", Project.MSG_WARN);
            return;
        }
/*
    //REVISIT: there must be cleaner way of doing this, if it is merited at all
        if (subTarget == null) {
            subTarget = getOwningTarget().getName();
        }
*/
        BuildException buildException = null;
        for (String filename : filenames) {
            File file = null;
            String subdirPath = null;
            Throwable thrownException = null;
            try {
                File directory = null;
                file = new File(filename);
                if (file.isDirectory()) {
                    if (verbose) {
                        subdirPath = file.getPath();
                        log("Entering directory: " + subdirPath + "\n", Project.MSG_INFO);
                    }
                    if (genericantfile != null) {
                        directory = file;
                        file = genericantfile;
                    } else {
                        file = new File(file, antfile);
                    }
                }
                execute(file, directory);
                if (verbose && subdirPath != null) {
                    log("Leaving directory: " + subdirPath + "\n", Project.MSG_INFO);
                }
            } catch (RuntimeException ex) {
                if (!getProject().isKeepGoingMode()) {
                    if (verbose && subdirPath != null) {
                        log("Leaving directory: " + subdirPath + "\n", Project.MSG_INFO);
                    }
                    throw ex; // throw further
                }
                thrownException = ex;
            } catch (Throwable ex) {
                if (!getProject().isKeepGoingMode()) {
                    if (verbose && subdirPath != null) {
                        log("Leaving directory: " + subdirPath + "\n", Project.MSG_INFO);
                    }
                    throw new BuildException(ex);
                }
                thrownException = ex;
            }
            if (thrownException != null) {
                if (thrownException instanceof BuildException) {
                    log("File '" + file
                        + "' failed with message '"
                        + thrownException.getMessage() + "'.", Project.MSG_ERR);
                    // only the first build exception is reported
                    if (buildException == null) {
                        buildException = (BuildException) thrownException;
                    }
                } else {
                    log("Target '" + file
                        + "' failed with message '"
                        + thrownException.getMessage() + "'.", Project.MSG_ERR);
                    log(StringUtils.getStackTrace(thrownException), Project.MSG_ERR);
                    if (buildException == null) {
                        buildException =
                            new BuildException(thrownException);
                    }
                }
                if (verbose && subdirPath != null) {
                    log("Leaving directory: " + subdirPath + "\n", Project.MSG_INFO);
                }
            }
        }
        // check if one of the builds failed in keep going mode
        if (buildException != null) {
            throw buildException;
        }
    }