public InputStream getInputStream()

in src/main/java/org/apache/commons/compress/archivers/zip/ZipFile.java [1225:1289]
55 lines of code
24 McCabe index (conditional complexity)

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

        // 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(entry)); // NOSONAR
        switch (ZipMethod.getMethodByCode(entry.getMethod())) {
        case STORED:
            return new StoredStatisticsStream(is);
        case UNSHRINKING:
            return new UnshrinkingInputStream(is);
        case IMPLODING:
            try {
                return new ExplodingInputStream(entry.getGeneralPurposeBit().getSlidingDictionarySize(),
                        entry.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/8/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 ZSTD:
        case ZSTD_DEPRECATED:
            return createZstdInputStream(is);
        case XZ:
            return new XZCompressorInputStream(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:
        default:
            throw new UnsupportedZipFeatureException(ZipMethod.getMethodByCode(entry.getMethod()), entry);
        }
    }