private BlobMigrationCase discoverBlobMigrationCase()

in oak-upgrade/src/main/java/org/apache/jackrabbit/oak/upgrade/cli/parser/DatastoreArguments.java [203:242]
29 lines of code
29 McCabe index (conditional complexity)

    private BlobMigrationCase discoverBlobMigrationCase() throws IOException {
        boolean srcDefined = options.isSrcBlobStoreDefined() || storeArguments.getSrcType() == JCR2_DIR_XML;
        boolean dstDefined = options.isDstBlobStoreDefined();
        boolean copyBinaries = options.isCopyBinaries();

        boolean srcSegment = storeArguments.getSrcType().isSegment();
        boolean dstSegment = storeArguments.getDstType().isSegment();

        // default case, no datastore-related arguments given, but blobs are stored externally
        if (!srcDefined && !dstDefined && !srcEmbedded && !copyBinaries) {
            if (srcSegment && !dstSegment) { // segment -> document is not supported for this case
                return BlobMigrationCase.UNSUPPORTED;
            } else { // we try to copy references using MissingBlobStore
                return BlobMigrationCase.COPY_REFERENCES;
            }
            // can't copy binaries if they are stored externally and we don't know where
        } else if (!srcDefined && !dstDefined && !srcEmbedded && copyBinaries) {
            return BlobMigrationCase.UNSUPPORTED;
            // can't copy binaries if they are stored externally and we don't know where
            // (even if the destination datastore is defined)
        } else if (!srcDefined && !srcEmbedded && dstDefined) {
            return BlobMigrationCase.UNSUPPORTED;
            // source is embedded and no destination given
        } else if (!srcDefined && srcEmbedded && !dstDefined) {
            return BlobMigrationCase.EMBEDDED_TO_EMBEDDED;
            // source is embedded and the destination is given
        } else if (!srcDefined && srcEmbedded && dstDefined) {
            return BlobMigrationCase.EMBEDDED_TO_EXTERNAL;
            // source is given, no destination, but also no --copy-binaries -> copy references
        } else if (srcDefined && !dstDefined && !copyBinaries) {
            return BlobMigrationCase.COPY_REFERENCES;
            // source is given, no destination, but --copy-binaries -> copy to embedded
        } else if (srcDefined && !dstDefined && copyBinaries) {
            return BlobMigrationCase.EXTERNAL_TO_EMBEDDED;
            // source and destination is given
        } else if (srcDefined && dstDefined) {
            return BlobMigrationCase.EXTERNAL_TO_EXTERNAL;
        }
        return BlobMigrationCase.UNSUPPORTED;
    }