public void execute()

in src/main/org/apache/ant/compress/taskdefs/ArchiveBase.java [276:329]
49 lines of code
9 McCabe index (conditional complexity)

    public void execute() {
        validate();
        final Resource targetArchive = getDest();
        if (!targetArchive.isExists()) {
            // force create mode
            mode = new Mode();
            mode.setValue(Mode.FORCE_CREATE);
        }
        Collection sourceResources;
        try {
            sourceResources = findSources();
        } catch (IOException ioex) {
            throw new BuildException("Failed to read sources", ioex);
        }
        if (sourceResources.size() == 0) {
            if (WhenEmpty.SKIP.equals(emptyBehavior.getValue())) {
                log(NO_SOURCES_MSG, Project.MSG_WARN);
            } else {
                throw new BuildException(NO_SOURCES_MSG);
            }
        } else {
            File copyOfDest = maybeCopyTarget();
            Resource destOrCopy = copyOfDest == null
                ? targetArchive
                : new FileResource(copyOfDest);
            ArchiveFileSet existingEntries =
                fileSetBuilder.buildFileSet(destOrCopy);
            existingEntries.setProject(getProject());
            try {

                List/*<ResourceWithFlags>*/ toAdd
                    = new ArrayList/*<ResourceWithFlags>*/();
                toAdd.addAll(sourceResources);

                if (checkAndLogUpToDate(toAdd, targetArchive,
                                        existingEntries)) {
                    return;
                }

                addResourcesToKeep(toAdd, existingEntries, sourceResources);
                sort(toAdd);

                try {
                    writeArchive(toAdd);
                } catch (IOException ioex) {
                    throw new BuildException("Failed to write archive", ioex);
                }
            } finally {
                if (copyOfDest != null) {
                    FILE_UTILS.tryHardToDelete(copyOfDest);
                }
            }
        }
    }