Examples with MetadataTransactionFactory io.nem.symbol.sdk.model.transaction.MetadataTransactionFactory used on opensource projects

Example 1 with MetadataTransactionFactory

use of io.nem.symbol.sdk.model.transaction.MetadataTransactionFactory in project nem2-sdk-java by nemtech.

the class MetadataTransactionServiceImpl method processMetadata.

/**
 * Generic way of processing a metadata entity and creating a new metadata transaction factory
 * depending on the existing metadata value. This works for Account, Mosaic and Namespace
 * metadata.
 *
 * @param criteria the criteria
 * @param transactionFactory the function that creates a transaction factory
 * @param newValue the new value you want to set.
 * @param <T> the type of the transaction factory.
 * @return an Observable of a transaction factory.
 */
private <T extends MetadataTransactionFactory> Observable<T> processMetadata(MetadataSearchCriteria criteria, TriFunction<byte[], NetworkType, Deadline, T> transactionFactory, String newValue) {
    return Observable.combineLatest(networkTypeObservable, epochAdjustmentObservable, (networkType, epochAdjustment) -> metadataRepository.search(criteria).map(page -> {
        Deadline deadline = Deadline.create(epochAdjustment);
        if (page.getData().isEmpty()) {
            return transactionFactory.apply(StringEncoder.getBytes(newValue), networkType, deadline);
        } else {
            byte[] originalValue = page.getData().get(0).getValue();
            byte[] newValueBytes = StringEncoder.getBytes(newValue);
            byte[] xoredBytes = ConvertUtils.xor(originalValue, newValueBytes);
            T factory = transactionFactory.apply(xoredBytes, networkType, deadline);
            factory.valueSizeDelta(newValueBytes.length - originalValue.length);
            return factory;
        }
    })).flatMap(f -> f);
}