public InputStream getInputStream()

in src/main/java/org/apache/commons/compress/archivers/zip/ZipFile.java [944:1006]
53 lines of code
22 McCabe index (conditional complexity)

    public InputStream getInputStream(final ZipArchiveEntry zipEntry)
        throws IOException {
        if (!(zipEntry instanceof Entry)) {
            return null;
        }
        // cast validity is checked just above
        ZipUtil.checkRequestedFeatures(zipEntry);

        // doesn't get closed if the method is not supported - which
        // should never happen because of the checkRequestedFeatures
        // call above
        final InputStream is = new BufferedInputStream(getRawInputStream(zipEntry)); //NOSONAR
        switch (ZipMethod.getMethodByCode(zipEntry.getMethod())) {
            case STORED:
                return new StoredStatisticsStream(is);
            case UNSHRINKING:
                return new UnshrinkingInputStream(is);
            case IMPLODING:
                try {
                    return new ExplodingInputStream(zipEntry.getGeneralPurposeBit().getSlidingDictionarySize(),
                            zipEntry.getGeneralPurposeBit().getNumberOfShannonFanoTrees(), is);
                } catch (final IllegalArgumentException ex) {
                    throw new IOException("bad IMPLODE data", ex);
                }
            case DEFLATED:
                final Inflater inflater = new Inflater(true);
                // Inflater with nowrap=true has this odd contract for a zero padding
                // byte following the data stream; this used to be zlib's requirement
                // and has been fixed a long time ago, but the contract persists so
                // we comply.
                // https://docs.oracle.com/javase/7/docs/api/java/util/zip/Inflater.html#Inflater(boolean)
                return new InflaterInputStreamWithStatistics(new SequenceInputStream(is, new ByteArrayInputStream(ONE_ZERO_BYTE)),
                    inflater) {
                    @Override
                    public void close() throws IOException {
                        try {
                            super.close();
                        } finally {
                            inflater.end();
                        }
                    }
                };
            case BZIP2:
                return new BZip2CompressorInputStream(is);
            case ENHANCED_DEFLATED:
                return new Deflate64CompressorInputStream(is);
            case AES_ENCRYPTED:
            case EXPANDING_LEVEL_1:
            case EXPANDING_LEVEL_2:
            case EXPANDING_LEVEL_3:
            case EXPANDING_LEVEL_4:
            case JPEG:
            case LZMA:
            case PKWARE_IMPLODING:
            case PPMD:
            case TOKENIZATION:
            case UNKNOWN:
            case WAVPACK:
            case XZ:
            default:
                throw new UnsupportedZipFeatureException(ZipMethod.getMethodByCode(zipEntry.getMethod()), zipEntry);
        }
    }