private void handleSubsystemArtifact()

in src/main/java/org/apache/sling/installer/factories/subsystems/base/impl/SubsystemBaseTransformer.java [162:216]
50 lines of code
9 McCabe index (conditional complexity)

    private void handleSubsystemArtifact(String artifactName, ZipInputStream zis, ZipOutputStream zos,
            StringBuilder subsystemContent) throws IOException {
        int idx = artifactName.indexOf('/');
        int idx2 = artifactName.lastIndexOf('/');
        if (idx != idx2 || idx == 0)
            throw new IOException("Invalid entry name, should have format .../<num>/artifact.jar: " + artifactName);

        int startOrder = Integer.parseInt(artifactName.substring(0, idx));
        idx++;
        if (artifactName.length() > idx) {
            File tempArtifact = File.createTempFile("sling-generated", ".tmp");
            tempArtifact.deleteOnExit();
            Path tempPath = tempArtifact.toPath();
            Files.copy(zis, tempPath, StandardCopyOption.REPLACE_EXISTING);

            try (JarFile jf = new JarFile(tempArtifact)) {
                Attributes ma = jf.getManifest().getMainAttributes();
                String bsn = ma.getValue(Constants.BUNDLE_SYMBOLICNAME);
                String version = ma.getValue(Constants.BUNDLE_VERSION);
                if (version == null)
                    version = "0";
                String type = ma.getValue(Constants.FRAGMENT_HOST) != null ?
                        IdentityNamespace.TYPE_FRAGMENT : IdentityNamespace.TYPE_BUNDLE;
                if (bsn != null) {
                    if (subsystemContent.length() > 0)
                        subsystemContent.append(',');

                    subsystemContent.append(bsn);
                    subsystemContent.append(';');
                    subsystemContent.append(IdentityNamespace.CAPABILITY_VERSION_ATTRIBUTE);
                    subsystemContent.append('=');
                    subsystemContent.append(version);
                    subsystemContent.append(';');
                    subsystemContent.append(IdentityNamespace.CAPABILITY_TYPE_ATTRIBUTE);
                    subsystemContent.append('=');
                    subsystemContent.append(type);
                    subsystemContent.append(';');
                    subsystemContent.append(SubsystemConstants.START_ORDER_DIRECTIVE);
                    subsystemContent.append(":=");
                    subsystemContent.append(startOrder);
                }

            } catch (Exception ex) {
                // apparently not a valid JarFile
            }
            ZipEntry zoe = new ZipEntry(artifactName.substring(idx));
            try {
                zos.putNextEntry(zoe);
                Files.copy(tempPath, zos);
            } finally {
                zos.closeEntry();
                tempArtifact.delete();
            }
        }
    }